The patch below does not apply to the 6.6-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y
git checkout FETCH_HEAD
git cherry-pick -x a0fd1c6098633f9a95fc2f636383546c82b704c3
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025051949-line-blog-2ffe@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From a0fd1c6098633f9a95fc2f636383546c82b704c3 Mon Sep 17 00:00:00 2001
From: Boris Burkov <boris(a)bur.io>
Date: Wed, 7 May 2025 12:42:24 -0700
Subject: [PATCH] btrfs: fix folio leak in submit_one_async_extent()
If btrfs_reserve_extent() fails while submitting an async_extent for a
compressed write, then we fail to call free_async_extent_pages() on the
async_extent and leak its folios. A likely cause for such a failure
would be btrfs_reserve_extent() failing to find a large enough
contiguous free extent for the compressed extent.
I was able to reproduce this by:
1. mount with compress-force=zstd:3
2. fallocating most of a filesystem to a big file
3. fragmenting the remaining free space
4. trying to copy in a file which zstd would generate large compressed
extents for (vmlinux worked well for this)
Step 4. hits the memory leak and can be repeated ad nauseam to
eventually exhaust the system memory.
Fix this by detecting the case where we fallback to uncompressed
submission for a compressed async_extent and ensuring that we call
free_async_extent_pages().
Fixes: 131a821a243f ("btrfs: fallback if compressed IO fails for ENOSPC")
CC: stable(a)vger.kernel.org # 6.1+
Reviewed-by: Filipe Manana <fdmanana(a)suse.com>
Co-developed-by: Josef Bacik <josef(a)toxicpanda.com>
Signed-off-by: Boris Burkov <boris(a)bur.io>
Reviewed-by: David Sterba <dsterba(a)suse.com>
Signed-off-by: David Sterba <dsterba(a)suse.com>
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index d295a37fa049..c1bd17915f81 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1109,6 +1109,7 @@ static void submit_one_async_extent(struct async_chunk *async_chunk,
struct extent_state *cached = NULL;
struct extent_map *em;
int ret = 0;
+ bool free_pages = false;
u64 start = async_extent->start;
u64 end = async_extent->start + async_extent->ram_size - 1;
@@ -1129,7 +1130,10 @@ static void submit_one_async_extent(struct async_chunk *async_chunk,
}
if (async_extent->compress_type == BTRFS_COMPRESS_NONE) {
+ ASSERT(!async_extent->folios);
+ ASSERT(async_extent->nr_folios == 0);
submit_uncompressed_range(inode, async_extent, locked_folio);
+ free_pages = true;
goto done;
}
@@ -1145,6 +1149,7 @@ static void submit_one_async_extent(struct async_chunk *async_chunk,
* fall back to uncompressed.
*/
submit_uncompressed_range(inode, async_extent, locked_folio);
+ free_pages = true;
goto done;
}
@@ -1186,6 +1191,8 @@ static void submit_one_async_extent(struct async_chunk *async_chunk,
done:
if (async_chunk->blkcg_css)
kthread_associate_blkcg(NULL);
+ if (free_pages)
+ free_async_extent_pages(async_extent);
kfree(async_extent);
return;
The patch below does not apply to the 5.10-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y
git checkout FETCH_HEAD
git cherry-pick -x 54db6d1bdd71fa90172a2a6aca3308bbf7fa7eb5
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025051934-turret-savage-e165@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 54db6d1bdd71fa90172a2a6aca3308bbf7fa7eb5 Mon Sep 17 00:00:00 2001
From: Filipe Manana <fdmanana(a)suse.com>
Date: Mon, 5 May 2025 16:03:16 +0100
Subject: [PATCH] btrfs: fix discard worker infinite loop after disabling
discard
If the discard worker is running and there's currently only one block
group, that block group is a data block group, it's in the unused block
groups discard list and is being used (it got an extent allocated from it
after becoming unused), the worker can end up in an infinite loop if a
transaction abort happens or the async discard is disabled (during remount
or unmount for example).
This happens like this:
1) Task A, the discard worker, is at peek_discard_list() and
find_next_block_group() returns block group X;
2) Block group X is in the unused block groups discard list (its discard
index is BTRFS_DISCARD_INDEX_UNUSED) since at some point in the past
it become an unused block group and was added to that list, but then
later it got an extent allocated from it, so its ->used counter is not
zero anymore;
3) The current transaction is aborted by task B and we end up at
__btrfs_handle_fs_error() in the transaction abort path, where we call
btrfs_discard_stop(), which clears BTRFS_FS_DISCARD_RUNNING from
fs_info, and then at __btrfs_handle_fs_error() we set the fs to RO mode
(setting SB_RDONLY in the super block's s_flags field);
4) Task A calls __add_to_discard_list() with the goal of moving the block
group from the unused block groups discard list into another discard
list, but at __add_to_discard_list() we end up doing nothing because
btrfs_run_discard_work() returns false, since the super block has
SB_RDONLY set in its flags and BTRFS_FS_DISCARD_RUNNING is not set
anymore in fs_info->flags. So block group X remains in the unused block
groups discard list;
5) Task A then does a goto into the 'again' label, calls
find_next_block_group() again we gets block group X again. Then it
repeats the previous steps over and over since there are not other
block groups in the discard lists and block group X is never moved
out of the unused block groups discard list since
btrfs_run_discard_work() keeps returning false and therefore
__add_to_discard_list() doesn't move block group X out of that discard
list.
When this happens we can get a soft lockup report like this:
[71.957] watchdog: BUG: soft lockup - CPU#0 stuck for 27s! [kworker/u4:3:97]
[71.957] Modules linked in: xfs af_packet rfkill (...)
[71.957] CPU: 0 UID: 0 PID: 97 Comm: kworker/u4:3 Tainted: G W 6.14.2-1-default #1 openSUSE Tumbleweed 968795ef2b1407352128b466fe887416c33af6fa
[71.957] Tainted: [W]=WARN
[71.957] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.2-3-gd478f380-rebuilt.opensuse.org 04/01/2014
[71.957] Workqueue: btrfs_discard btrfs_discard_workfn [btrfs]
[71.957] RIP: 0010:btrfs_discard_workfn+0xc4/0x400 [btrfs]
[71.957] Code: c1 01 48 83 (...)
[71.957] RSP: 0018:ffffafaec03efe08 EFLAGS: 00000246
[71.957] RAX: ffff897045500000 RBX: ffff8970413ed8d0 RCX: 0000000000000000
[71.957] RDX: 0000000000000001 RSI: ffff8970413ed8d0 RDI: 0000000a8f1272ad
[71.957] RBP: 0000000a9d61c60e R08: ffff897045500140 R09: 8080808080808080
[71.957] R10: ffff897040276800 R11: fefefefefefefeff R12: ffff8970413ed860
[71.957] R13: ffff897045500000 R14: ffff8970413ed868 R15: 0000000000000000
[71.957] FS: 0000000000000000(0000) GS:ffff89707bc00000(0000) knlGS:0000000000000000
[71.957] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[71.957] CR2: 00005605bcc8d2f0 CR3: 000000010376a001 CR4: 0000000000770ef0
[71.957] PKRU: 55555554
[71.957] Call Trace:
[71.957] <TASK>
[71.957] process_one_work+0x17e/0x330
[71.957] worker_thread+0x2ce/0x3f0
[71.957] ? __pfx_worker_thread+0x10/0x10
[71.957] kthread+0xef/0x220
[71.957] ? __pfx_kthread+0x10/0x10
[71.957] ret_from_fork+0x34/0x50
[71.957] ? __pfx_kthread+0x10/0x10
[71.957] ret_from_fork_asm+0x1a/0x30
[71.957] </TASK>
[71.957] Kernel panic - not syncing: softlockup: hung tasks
[71.987] CPU: 0 UID: 0 PID: 97 Comm: kworker/u4:3 Tainted: G W L 6.14.2-1-default #1 openSUSE Tumbleweed 968795ef2b1407352128b466fe887416c33af6fa
[71.989] Tainted: [W]=WARN, [L]=SOFTLOCKUP
[71.989] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.2-3-gd478f380-rebuilt.opensuse.org 04/01/2014
[71.991] Workqueue: btrfs_discard btrfs_discard_workfn [btrfs]
[71.992] Call Trace:
[71.993] <IRQ>
[71.994] dump_stack_lvl+0x5a/0x80
[71.994] panic+0x10b/0x2da
[71.995] watchdog_timer_fn.cold+0x9a/0xa1
[71.996] ? __pfx_watchdog_timer_fn+0x10/0x10
[71.997] __hrtimer_run_queues+0x132/0x2a0
[71.997] hrtimer_interrupt+0xff/0x230
[71.998] __sysvec_apic_timer_interrupt+0x55/0x100
[71.999] sysvec_apic_timer_interrupt+0x6c/0x90
[72.000] </IRQ>
[72.000] <TASK>
[72.001] asm_sysvec_apic_timer_interrupt+0x1a/0x20
[72.002] RIP: 0010:btrfs_discard_workfn+0xc4/0x400 [btrfs]
[72.002] Code: c1 01 48 83 (...)
[72.005] RSP: 0018:ffffafaec03efe08 EFLAGS: 00000246
[72.006] RAX: ffff897045500000 RBX: ffff8970413ed8d0 RCX: 0000000000000000
[72.006] RDX: 0000000000000001 RSI: ffff8970413ed8d0 RDI: 0000000a8f1272ad
[72.007] RBP: 0000000a9d61c60e R08: ffff897045500140 R09: 8080808080808080
[72.008] R10: ffff897040276800 R11: fefefefefefefeff R12: ffff8970413ed860
[72.009] R13: ffff897045500000 R14: ffff8970413ed868 R15: 0000000000000000
[72.010] ? btrfs_discard_workfn+0x51/0x400 [btrfs 23b01089228eb964071fb7ca156eee8cd3bf996f]
[72.011] process_one_work+0x17e/0x330
[72.012] worker_thread+0x2ce/0x3f0
[72.013] ? __pfx_worker_thread+0x10/0x10
[72.014] kthread+0xef/0x220
[72.014] ? __pfx_kthread+0x10/0x10
[72.015] ret_from_fork+0x34/0x50
[72.015] ? __pfx_kthread+0x10/0x10
[72.016] ret_from_fork_asm+0x1a/0x30
[72.017] </TASK>
[72.017] Kernel Offset: 0x15000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[72.019] Rebooting in 90 seconds..
So fix this by making sure we move a block group out of the unused block
groups discard list when calling __add_to_discard_list().
Fixes: 2bee7eb8bb81 ("btrfs: discard one region at a time in async discard")
Link: https://bugzilla.suse.com/show_bug.cgi?id=1242012
CC: stable(a)vger.kernel.org # 5.10+
Reviewed-by: Boris Burkov <boris(a)bur.io>
Reviewed-by: Daniel Vacek <neelx(a)suse.com>
Signed-off-by: Filipe Manana <fdmanana(a)suse.com>
Signed-off-by: David Sterba <dsterba(a)suse.com>
diff --git a/fs/btrfs/discard.c b/fs/btrfs/discard.c
index d6eef4bd9e9d..de23c4b3515e 100644
--- a/fs/btrfs/discard.c
+++ b/fs/btrfs/discard.c
@@ -94,8 +94,6 @@ static void __add_to_discard_list(struct btrfs_discard_ctl *discard_ctl,
struct btrfs_block_group *block_group)
{
lockdep_assert_held(&discard_ctl->lock);
- if (!btrfs_run_discard_work(discard_ctl))
- return;
if (list_empty(&block_group->discard_list) ||
block_group->discard_index == BTRFS_DISCARD_INDEX_UNUSED) {
@@ -118,6 +116,9 @@ static void add_to_discard_list(struct btrfs_discard_ctl *discard_ctl,
if (!btrfs_is_block_group_data_only(block_group))
return;
+ if (!btrfs_run_discard_work(discard_ctl))
+ return;
+
spin_lock(&discard_ctl->lock);
__add_to_discard_list(discard_ctl, block_group);
spin_unlock(&discard_ctl->lock);
@@ -244,6 +245,18 @@ static struct btrfs_block_group *peek_discard_list(
block_group->used != 0) {
if (btrfs_is_block_group_data_only(block_group)) {
__add_to_discard_list(discard_ctl, block_group);
+ /*
+ * The block group must have been moved to other
+ * discard list even if discard was disabled in
+ * the meantime or a transaction abort happened,
+ * otherwise we can end up in an infinite loop,
+ * always jumping into the 'again' label and
+ * keep getting this block group over and over
+ * in case there are no other block groups in
+ * the discard lists.
+ */
+ ASSERT(block_group->discard_index !=
+ BTRFS_DISCARD_INDEX_UNUSED);
} else {
list_del_init(&block_group->discard_list);
btrfs_put_block_group(block_group);
The patch below does not apply to the 5.15-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y
git checkout FETCH_HEAD
git cherry-pick -x 9a9c3e1fe5256da14a0a307dff0478f90c55fc8c
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025051918-corned-scrounger-ebcc@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 9a9c3e1fe5256da14a0a307dff0478f90c55fc8c Mon Sep 17 00:00:00 2001
From: Wayne Lin <Wayne.Lin(a)amd.com>
Date: Tue, 13 May 2025 11:20:24 +0800
Subject: [PATCH] drm/amd/display: Avoid flooding unnecessary info messages
It's expected that we'll encounter temporary exceptions
during aux transactions. Adjust logging from drm_info to
drm_dbg_dp to prevent flooding with unnecessary log messages.
Fixes: 3637e457eb00 ("drm/amd/display: Fix wrong handling for AUX_DEFER case")
Cc: Mario Limonciello <mario.limonciello(a)amd.com>
Cc: Alex Deucher <alexander.deucher(a)amd.com>
Signed-off-by: Wayne Lin <Wayne.Lin(a)amd.com>
Acked-by: Alex Deucher <alexander.deucher(a)amd.com>
Link: https://lore.kernel.org/r/20250513032026.838036-1-Wayne.Lin@amd.com
Signed-off-by: Mario Limonciello <mario.limonciello(a)amd.com>
Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com>
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index 0d7b72c75802..25e8befbcc47 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -107,7 +107,7 @@ static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux,
if (payload.write && result >= 0) {
if (result) {
/*one byte indicating partially written bytes*/
- drm_info(adev_to_drm(adev), "amdgpu: AUX partially written\n");
+ drm_dbg_dp(adev_to_drm(adev), "amdgpu: AUX partially written\n");
result = payload.data[0];
} else if (!payload.reply[0])
/*I2C_ACK|AUX_ACK*/
@@ -133,11 +133,11 @@ static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux,
break;
}
- drm_info(adev_to_drm(adev), "amdgpu: DP AUX transfer fail:%d\n", operation_result);
+ drm_dbg_dp(adev_to_drm(adev), "amdgpu: DP AUX transfer fail:%d\n", operation_result);
}
if (payload.reply[0])
- drm_info(adev_to_drm(adev), "amdgpu: AUX reply command not ACK: 0x%02x.",
+ drm_dbg_dp(adev_to_drm(adev), "amdgpu: AUX reply command not ACK: 0x%02x.",
payload.reply[0]);
return result;
The patch below does not apply to the 6.1-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y
git checkout FETCH_HEAD
git cherry-pick -x 9a9c3e1fe5256da14a0a307dff0478f90c55fc8c
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025051918-freefall-brute-4716@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 9a9c3e1fe5256da14a0a307dff0478f90c55fc8c Mon Sep 17 00:00:00 2001
From: Wayne Lin <Wayne.Lin(a)amd.com>
Date: Tue, 13 May 2025 11:20:24 +0800
Subject: [PATCH] drm/amd/display: Avoid flooding unnecessary info messages
It's expected that we'll encounter temporary exceptions
during aux transactions. Adjust logging from drm_info to
drm_dbg_dp to prevent flooding with unnecessary log messages.
Fixes: 3637e457eb00 ("drm/amd/display: Fix wrong handling for AUX_DEFER case")
Cc: Mario Limonciello <mario.limonciello(a)amd.com>
Cc: Alex Deucher <alexander.deucher(a)amd.com>
Signed-off-by: Wayne Lin <Wayne.Lin(a)amd.com>
Acked-by: Alex Deucher <alexander.deucher(a)amd.com>
Link: https://lore.kernel.org/r/20250513032026.838036-1-Wayne.Lin@amd.com
Signed-off-by: Mario Limonciello <mario.limonciello(a)amd.com>
Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com>
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index 0d7b72c75802..25e8befbcc47 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -107,7 +107,7 @@ static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux,
if (payload.write && result >= 0) {
if (result) {
/*one byte indicating partially written bytes*/
- drm_info(adev_to_drm(adev), "amdgpu: AUX partially written\n");
+ drm_dbg_dp(adev_to_drm(adev), "amdgpu: AUX partially written\n");
result = payload.data[0];
} else if (!payload.reply[0])
/*I2C_ACK|AUX_ACK*/
@@ -133,11 +133,11 @@ static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux,
break;
}
- drm_info(adev_to_drm(adev), "amdgpu: DP AUX transfer fail:%d\n", operation_result);
+ drm_dbg_dp(adev_to_drm(adev), "amdgpu: DP AUX transfer fail:%d\n", operation_result);
}
if (payload.reply[0])
- drm_info(adev_to_drm(adev), "amdgpu: AUX reply command not ACK: 0x%02x.",
+ drm_dbg_dp(adev_to_drm(adev), "amdgpu: AUX reply command not ACK: 0x%02x.",
payload.reply[0]);
return result;
The patch below does not apply to the 6.6-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y
git checkout FETCH_HEAD
git cherry-pick -x 9a9c3e1fe5256da14a0a307dff0478f90c55fc8c
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025051918-limes-spendable-685f@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 9a9c3e1fe5256da14a0a307dff0478f90c55fc8c Mon Sep 17 00:00:00 2001
From: Wayne Lin <Wayne.Lin(a)amd.com>
Date: Tue, 13 May 2025 11:20:24 +0800
Subject: [PATCH] drm/amd/display: Avoid flooding unnecessary info messages
It's expected that we'll encounter temporary exceptions
during aux transactions. Adjust logging from drm_info to
drm_dbg_dp to prevent flooding with unnecessary log messages.
Fixes: 3637e457eb00 ("drm/amd/display: Fix wrong handling for AUX_DEFER case")
Cc: Mario Limonciello <mario.limonciello(a)amd.com>
Cc: Alex Deucher <alexander.deucher(a)amd.com>
Signed-off-by: Wayne Lin <Wayne.Lin(a)amd.com>
Acked-by: Alex Deucher <alexander.deucher(a)amd.com>
Link: https://lore.kernel.org/r/20250513032026.838036-1-Wayne.Lin@amd.com
Signed-off-by: Mario Limonciello <mario.limonciello(a)amd.com>
Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com>
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index 0d7b72c75802..25e8befbcc47 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -107,7 +107,7 @@ static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux,
if (payload.write && result >= 0) {
if (result) {
/*one byte indicating partially written bytes*/
- drm_info(adev_to_drm(adev), "amdgpu: AUX partially written\n");
+ drm_dbg_dp(adev_to_drm(adev), "amdgpu: AUX partially written\n");
result = payload.data[0];
} else if (!payload.reply[0])
/*I2C_ACK|AUX_ACK*/
@@ -133,11 +133,11 @@ static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux,
break;
}
- drm_info(adev_to_drm(adev), "amdgpu: DP AUX transfer fail:%d\n", operation_result);
+ drm_dbg_dp(adev_to_drm(adev), "amdgpu: DP AUX transfer fail:%d\n", operation_result);
}
if (payload.reply[0])
- drm_info(adev_to_drm(adev), "amdgpu: AUX reply command not ACK: 0x%02x.",
+ drm_dbg_dp(adev_to_drm(adev), "amdgpu: AUX reply command not ACK: 0x%02x.",
payload.reply[0]);
return result;
The patch below does not apply to the 6.12-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.12.y
git checkout FETCH_HEAD
git cherry-pick -x 9a9c3e1fe5256da14a0a307dff0478f90c55fc8c
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025051917-outer-worrier-c3ff@gregkh' --subject-prefix 'PATCH 6.12.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 9a9c3e1fe5256da14a0a307dff0478f90c55fc8c Mon Sep 17 00:00:00 2001
From: Wayne Lin <Wayne.Lin(a)amd.com>
Date: Tue, 13 May 2025 11:20:24 +0800
Subject: [PATCH] drm/amd/display: Avoid flooding unnecessary info messages
It's expected that we'll encounter temporary exceptions
during aux transactions. Adjust logging from drm_info to
drm_dbg_dp to prevent flooding with unnecessary log messages.
Fixes: 3637e457eb00 ("drm/amd/display: Fix wrong handling for AUX_DEFER case")
Cc: Mario Limonciello <mario.limonciello(a)amd.com>
Cc: Alex Deucher <alexander.deucher(a)amd.com>
Signed-off-by: Wayne Lin <Wayne.Lin(a)amd.com>
Acked-by: Alex Deucher <alexander.deucher(a)amd.com>
Link: https://lore.kernel.org/r/20250513032026.838036-1-Wayne.Lin@amd.com
Signed-off-by: Mario Limonciello <mario.limonciello(a)amd.com>
Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com>
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index 0d7b72c75802..25e8befbcc47 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -107,7 +107,7 @@ static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux,
if (payload.write && result >= 0) {
if (result) {
/*one byte indicating partially written bytes*/
- drm_info(adev_to_drm(adev), "amdgpu: AUX partially written\n");
+ drm_dbg_dp(adev_to_drm(adev), "amdgpu: AUX partially written\n");
result = payload.data[0];
} else if (!payload.reply[0])
/*I2C_ACK|AUX_ACK*/
@@ -133,11 +133,11 @@ static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux,
break;
}
- drm_info(adev_to_drm(adev), "amdgpu: DP AUX transfer fail:%d\n", operation_result);
+ drm_dbg_dp(adev_to_drm(adev), "amdgpu: DP AUX transfer fail:%d\n", operation_result);
}
if (payload.reply[0])
- drm_info(adev_to_drm(adev), "amdgpu: AUX reply command not ACK: 0x%02x.",
+ drm_dbg_dp(adev_to_drm(adev), "amdgpu: AUX reply command not ACK: 0x%02x.",
payload.reply[0]);
return result;
The patch below does not apply to the 6.14-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.14.y
git checkout FETCH_HEAD
git cherry-pick -x 9a9c3e1fe5256da14a0a307dff0478f90c55fc8c
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025051917-kabob-bagginess-9b30@gregkh' --subject-prefix 'PATCH 6.14.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 9a9c3e1fe5256da14a0a307dff0478f90c55fc8c Mon Sep 17 00:00:00 2001
From: Wayne Lin <Wayne.Lin(a)amd.com>
Date: Tue, 13 May 2025 11:20:24 +0800
Subject: [PATCH] drm/amd/display: Avoid flooding unnecessary info messages
It's expected that we'll encounter temporary exceptions
during aux transactions. Adjust logging from drm_info to
drm_dbg_dp to prevent flooding with unnecessary log messages.
Fixes: 3637e457eb00 ("drm/amd/display: Fix wrong handling for AUX_DEFER case")
Cc: Mario Limonciello <mario.limonciello(a)amd.com>
Cc: Alex Deucher <alexander.deucher(a)amd.com>
Signed-off-by: Wayne Lin <Wayne.Lin(a)amd.com>
Acked-by: Alex Deucher <alexander.deucher(a)amd.com>
Link: https://lore.kernel.org/r/20250513032026.838036-1-Wayne.Lin@amd.com
Signed-off-by: Mario Limonciello <mario.limonciello(a)amd.com>
Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com>
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index 0d7b72c75802..25e8befbcc47 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -107,7 +107,7 @@ static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux,
if (payload.write && result >= 0) {
if (result) {
/*one byte indicating partially written bytes*/
- drm_info(adev_to_drm(adev), "amdgpu: AUX partially written\n");
+ drm_dbg_dp(adev_to_drm(adev), "amdgpu: AUX partially written\n");
result = payload.data[0];
} else if (!payload.reply[0])
/*I2C_ACK|AUX_ACK*/
@@ -133,11 +133,11 @@ static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux,
break;
}
- drm_info(adev_to_drm(adev), "amdgpu: DP AUX transfer fail:%d\n", operation_result);
+ drm_dbg_dp(adev_to_drm(adev), "amdgpu: DP AUX transfer fail:%d\n", operation_result);
}
if (payload.reply[0])
- drm_info(adev_to_drm(adev), "amdgpu: AUX reply command not ACK: 0x%02x.",
+ drm_dbg_dp(adev_to_drm(adev), "amdgpu: AUX reply command not ACK: 0x%02x.",
payload.reply[0]);
return result;
This patch series aims to fix various issues throughout the QinHeng CH9200
driver. This driver fails to handle various failures, which in one
case has lead to a uninit access bug found via syzbot. Upon reviewing
the driver I fixed a few more issues which I have included in this patch
series.
Parts of this series are the product of discussions and suggestions I had
from others like Andrew Lunn, Simon Horman and Jakub Kicinski you can view those
discussions below:
Link: <https://lore.kernel.org/all/20250319112156.48312-1-qasdev00@gmail.com>
Link: <https://lore.kernel.org/all/20250218002443.11731-1-qasdev00@gmail.com/>
Link: <https://lore.kernel.org/all/20250311161157.49065-1-qasdev00@gmail.com/>
Qasim Ijaz (5):
fix uninitialised access bug during mii_nway_restart
remove extraneous return that prevents error propagation
fail fast on control_read() failures during get_mac_address()
add missing error handling in ch9200_bind()
avoid triggering NWay restart on non-zero PHY ID
drivers/net/usb/ch9200.c | 61 ++++++++++++++++++++++++++--------------
1 file changed, 40 insertions(+), 21 deletions(-)
--
2.39.5
Signal vt subsystem to redraw console when switching to dummycon
with deferred takeover enabled. Makes the console switch to fbcon
and displays the available output.
With deferred takeover enabled, dummycon acts as the placeholder
until the first output to the console happens. At that point, fbcon
takes over. If the output happens while dummycon is not active, it
cannot inform fbcon. This is the case if the vt subsystem runs in
graphics mode.
A typical graphical boot starts plymouth, a display manager and a
compositor; all while leaving out dummycon. Switching to a text-mode
console leaves the console with dummycon even if a getty terminal
has been started.
Returning true from dummycon's con_switch helper signals the vt
subsystem to redraw the screen. If there's output available dummycon's
con_putc{s} helpers trigger deferred takeover of fbcon, which sets a
display mode and displays the output. If no output is available,
dummycon remains active.
Signed-off-by: Thomas Zimmermann <tzimmermann(a)suse.de>
Reported-by: Andrei Borzenkov <arvidjaar(a)gmail.com>
Closes: https://bugzilla.suse.com/show_bug.cgi?id=1242191
Tested-by: Andrei Borzenkov <arvidjaar(a)gmail.com>
Fixes: 83d83bebf401 ("console/fbcon: Add support for deferred console takeover")
Cc: Hans de Goede <hdegoede(a)redhat.com>
Cc: linux-fbdev(a)vger.kernel.org
Cc: dri-devel(a)lists.freedesktop.org
Cc: <stable(a)vger.kernel.org> # v4.19+
---
drivers/video/console/dummycon.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/drivers/video/console/dummycon.c b/drivers/video/console/dummycon.c
index 139049368fdc..afb8e4d2fc34 100644
--- a/drivers/video/console/dummycon.c
+++ b/drivers/video/console/dummycon.c
@@ -85,6 +85,12 @@ static bool dummycon_blank(struct vc_data *vc, enum vesa_blank_mode blank,
/* Redraw, so that we get putc(s) for output done while blanked */
return true;
}
+
+static bool dummycon_switch(struct vc_data *vc)
+{
+ /* Redraw, so that we get putc(s) for output done while switched away */
+ return true;
+}
#else
static void dummycon_putc(struct vc_data *vc, u16 c, unsigned int y,
unsigned int x) { }
@@ -95,6 +101,10 @@ static bool dummycon_blank(struct vc_data *vc, enum vesa_blank_mode blank,
{
return false;
}
+static bool dummycon_switch(struct vc_data *vc)
+{
+ return false;
+}
#endif
static const char *dummycon_startup(void)
@@ -124,11 +134,6 @@ static bool dummycon_scroll(struct vc_data *vc, unsigned int top,
return false;
}
-static bool dummycon_switch(struct vc_data *vc)
-{
- return false;
-}
-
/*
* The console `switch' structure for the dummy console
*
--
2.49.0