Some devices tend to trigger SYS_ERR interrupt while the host handling
SYS_ERR state of the device during power up. This creates a race
condition and causes a failure in booting up the device.
The issue is seen on the Sierra Wireless EM9191 modem during SYS_ERR
handling in mhi_async_power_up(). Once the host detects that the device
is in SYS_ERR state, it issues MHI_RESET and waits for the device to
process the reset request. During this time, the device triggers SYS_ERR
interrupt to the host and host starts handling SYS_ERR execution.
So by the time the device has completed reset, host starts SYS_ERR
handling. This causes the race condition and the modem fails to boot.
Hence, register the IRQ handler only after handling the SYS_ERR check
to avoid getting spurious IRQs from the device.
Cc: stable(a)vger.kernel.org
Fixes: e18d4e9fa79b ("bus: mhi: core: Handle syserr during power_up")
Reported-by: Aleksander Morgado <aleksander(a)aleksander.es>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam(a)linaro.org>
---
Changes in v3:
* Moved BHI_INTVEC setup after irq setup
* Used interval_us as the delay for the polling API
Changes in v2:
* Switched to "mhi_poll_reg_field" for detecting MHI reset in device.
drivers/bus/mhi/core/pm.c | 38 ++++++++++++++------------------------
1 file changed, 14 insertions(+), 24 deletions(-)
diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c
index fb99e3727155..ee0515a25e46 100644
--- a/drivers/bus/mhi/core/pm.c
+++ b/drivers/bus/mhi/core/pm.c
@@ -1038,7 +1038,7 @@ int mhi_async_power_up(struct mhi_controller *mhi_cntrl)
enum mhi_ee_type current_ee;
enum dev_st_transition next_state;
struct device *dev = &mhi_cntrl->mhi_dev->dev;
- u32 val;
+ u32 interval_us = 25000; /* poll register field every 25 milliseconds */
int ret;
dev_info(dev, "Requested to power ON\n");
@@ -1055,13 +1055,7 @@ int mhi_async_power_up(struct mhi_controller *mhi_cntrl)
mutex_lock(&mhi_cntrl->pm_mutex);
mhi_cntrl->pm_state = MHI_PM_DISABLE;
- ret = mhi_init_irq_setup(mhi_cntrl);
- if (ret)
- goto error_setup_irq;
-
- /* Setup BHI INTVEC */
write_lock_irq(&mhi_cntrl->pm_lock);
- mhi_write_reg(mhi_cntrl, mhi_cntrl->bhi, BHI_INTVEC, 0);
mhi_cntrl->pm_state = MHI_PM_POR;
mhi_cntrl->ee = MHI_EE_MAX;
current_ee = mhi_get_exec_env(mhi_cntrl);
@@ -1072,7 +1066,7 @@ int mhi_async_power_up(struct mhi_controller *mhi_cntrl)
dev_err(dev, "%s is not a valid EE for power on\n",
TO_MHI_EXEC_STR(current_ee));
ret = -EIO;
- goto error_async_power_up;
+ goto error_setup_irq;
}
state = mhi_get_mhi_state(mhi_cntrl);
@@ -1081,20 +1075,12 @@ int mhi_async_power_up(struct mhi_controller *mhi_cntrl)
if (state == MHI_STATE_SYS_ERR) {
mhi_set_mhi_state(mhi_cntrl, MHI_STATE_RESET);
- ret = wait_event_timeout(mhi_cntrl->state_event,
- MHI_PM_IN_FATAL_STATE(mhi_cntrl->pm_state) ||
- mhi_read_reg_field(mhi_cntrl,
- mhi_cntrl->regs,
- MHICTRL,
- MHICTRL_RESET_MASK,
- MHICTRL_RESET_SHIFT,
- &val) ||
- !val,
- msecs_to_jiffies(mhi_cntrl->timeout_ms));
- if (!ret) {
- ret = -EIO;
+ ret = mhi_poll_reg_field(mhi_cntrl, mhi_cntrl->regs, MHICTRL,
+ MHICTRL_RESET_MASK, MHICTRL_RESET_SHIFT, 0,
+ interval_us);
+ if (ret) {
dev_info(dev, "Failed to reset MHI due to syserr state\n");
- goto error_async_power_up;
+ goto error_setup_irq;
}
/*
@@ -1104,6 +1090,13 @@ int mhi_async_power_up(struct mhi_controller *mhi_cntrl)
mhi_write_reg(mhi_cntrl, mhi_cntrl->bhi, BHI_INTVEC, 0);
}
+ ret = mhi_init_irq_setup(mhi_cntrl);
+ if (ret)
+ goto error_setup_irq;
+
+ /* Setup BHI INTVEC */
+ mhi_write_reg(mhi_cntrl, mhi_cntrl->bhi, BHI_INTVEC, 0);
+
/* Transition to next state */
next_state = MHI_IN_PBL(current_ee) ?
DEV_ST_TRANSITION_PBL : DEV_ST_TRANSITION_READY;
@@ -1116,9 +1109,6 @@ int mhi_async_power_up(struct mhi_controller *mhi_cntrl)
return 0;
-error_async_power_up:
- mhi_deinit_free_irq(mhi_cntrl);
-
error_setup_irq:
mhi_cntrl->pm_state = MHI_PM_DISABLE;
mutex_unlock(&mhi_cntrl->pm_mutex);
--
2.25.1
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>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From ff2d23843f7fb4f13055be5a4a9a20ddd04e6e9c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michel=20D=C3=A4nzer?= <mdaenzer(a)redhat.com>
Date: Fri, 23 Jul 2021 09:58:57 +0200
Subject: [PATCH] dma-buf/poll: Get a file reference for outstanding fence
callbacks
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
This makes sure we don't hit the
BUG_ON(dmabuf->cb_in.active || dmabuf->cb_out.active);
in dma_buf_release, which could be triggered by user space closing the
dma-buf file description while there are outstanding fence callbacks
from dma_buf_poll.
Cc: stable(a)vger.kernel.org
Signed-off-by: Michel Dänzer <mdaenzer(a)redhat.com>
Reviewed-by: Christian König <christian.koenig(a)amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210723075857.4065-1-michel@…
Signed-off-by: Christian König <christian.koenig(a)amd.com>
diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index beb504a92d60..35fe1cb5ad98 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -67,12 +67,9 @@ static void dma_buf_release(struct dentry *dentry)
BUG_ON(dmabuf->vmapping_counter);
/*
- * Any fences that a dma-buf poll can wait on should be signaled
- * before releasing dma-buf. This is the responsibility of each
- * driver that uses the reservation objects.
- *
- * If you hit this BUG() it means someone dropped their ref to the
- * dma-buf while still having pending operation to the buffer.
+ * If you hit this BUG() it could mean:
+ * * There's a file reference imbalance in dma_buf_poll / dma_buf_poll_cb or somewhere else
+ * * dmabuf->cb_in/out.active are non-0 despite no pending fence callback
*/
BUG_ON(dmabuf->cb_in.active || dmabuf->cb_out.active);
@@ -200,6 +197,7 @@ static loff_t dma_buf_llseek(struct file *file, loff_t offset, int whence)
static void dma_buf_poll_cb(struct dma_fence *fence, struct dma_fence_cb *cb)
{
struct dma_buf_poll_cb_t *dcb = (struct dma_buf_poll_cb_t *)cb;
+ struct dma_buf *dmabuf = container_of(dcb->poll, struct dma_buf, poll);
unsigned long flags;
spin_lock_irqsave(&dcb->poll->lock, flags);
@@ -207,6 +205,8 @@ static void dma_buf_poll_cb(struct dma_fence *fence, struct dma_fence_cb *cb)
dcb->active = 0;
spin_unlock_irqrestore(&dcb->poll->lock, flags);
dma_fence_put(fence);
+ /* Paired with get_file in dma_buf_poll */
+ fput(dmabuf->file);
}
static bool dma_buf_poll_add_cb(struct dma_resv *resv, bool write,
@@ -259,6 +259,9 @@ static __poll_t dma_buf_poll(struct file *file, poll_table *poll)
spin_unlock_irq(&dmabuf->poll.lock);
if (events & EPOLLOUT) {
+ /* Paired with fput in dma_buf_poll_cb */
+ get_file(dmabuf->file);
+
if (!dma_buf_poll_add_cb(resv, true, dcb))
/* No callback queued, wake up any other waiters */
dma_buf_poll_cb(NULL, &dcb->cb);
@@ -279,6 +282,9 @@ static __poll_t dma_buf_poll(struct file *file, poll_table *poll)
spin_unlock_irq(&dmabuf->poll.lock);
if (events & EPOLLIN) {
+ /* Paired with fput in dma_buf_poll_cb */
+ get_file(dmabuf->file);
+
if (!dma_buf_poll_add_cb(resv, false, dcb))
/* No callback queued, wake up any other waiters */
dma_buf_poll_cb(NULL, &dcb->cb);
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>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From ff2d23843f7fb4f13055be5a4a9a20ddd04e6e9c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michel=20D=C3=A4nzer?= <mdaenzer(a)redhat.com>
Date: Fri, 23 Jul 2021 09:58:57 +0200
Subject: [PATCH] dma-buf/poll: Get a file reference for outstanding fence
callbacks
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
This makes sure we don't hit the
BUG_ON(dmabuf->cb_in.active || dmabuf->cb_out.active);
in dma_buf_release, which could be triggered by user space closing the
dma-buf file description while there are outstanding fence callbacks
from dma_buf_poll.
Cc: stable(a)vger.kernel.org
Signed-off-by: Michel Dänzer <mdaenzer(a)redhat.com>
Reviewed-by: Christian König <christian.koenig(a)amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210723075857.4065-1-michel@…
Signed-off-by: Christian König <christian.koenig(a)amd.com>
diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index beb504a92d60..35fe1cb5ad98 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -67,12 +67,9 @@ static void dma_buf_release(struct dentry *dentry)
BUG_ON(dmabuf->vmapping_counter);
/*
- * Any fences that a dma-buf poll can wait on should be signaled
- * before releasing dma-buf. This is the responsibility of each
- * driver that uses the reservation objects.
- *
- * If you hit this BUG() it means someone dropped their ref to the
- * dma-buf while still having pending operation to the buffer.
+ * If you hit this BUG() it could mean:
+ * * There's a file reference imbalance in dma_buf_poll / dma_buf_poll_cb or somewhere else
+ * * dmabuf->cb_in/out.active are non-0 despite no pending fence callback
*/
BUG_ON(dmabuf->cb_in.active || dmabuf->cb_out.active);
@@ -200,6 +197,7 @@ static loff_t dma_buf_llseek(struct file *file, loff_t offset, int whence)
static void dma_buf_poll_cb(struct dma_fence *fence, struct dma_fence_cb *cb)
{
struct dma_buf_poll_cb_t *dcb = (struct dma_buf_poll_cb_t *)cb;
+ struct dma_buf *dmabuf = container_of(dcb->poll, struct dma_buf, poll);
unsigned long flags;
spin_lock_irqsave(&dcb->poll->lock, flags);
@@ -207,6 +205,8 @@ static void dma_buf_poll_cb(struct dma_fence *fence, struct dma_fence_cb *cb)
dcb->active = 0;
spin_unlock_irqrestore(&dcb->poll->lock, flags);
dma_fence_put(fence);
+ /* Paired with get_file in dma_buf_poll */
+ fput(dmabuf->file);
}
static bool dma_buf_poll_add_cb(struct dma_resv *resv, bool write,
@@ -259,6 +259,9 @@ static __poll_t dma_buf_poll(struct file *file, poll_table *poll)
spin_unlock_irq(&dmabuf->poll.lock);
if (events & EPOLLOUT) {
+ /* Paired with fput in dma_buf_poll_cb */
+ get_file(dmabuf->file);
+
if (!dma_buf_poll_add_cb(resv, true, dcb))
/* No callback queued, wake up any other waiters */
dma_buf_poll_cb(NULL, &dcb->cb);
@@ -279,6 +282,9 @@ static __poll_t dma_buf_poll(struct file *file, poll_table *poll)
spin_unlock_irq(&dmabuf->poll.lock);
if (events & EPOLLIN) {
+ /* Paired with fput in dma_buf_poll_cb */
+ get_file(dmabuf->file);
+
if (!dma_buf_poll_add_cb(resv, false, dcb))
/* No callback queued, wake up any other waiters */
dma_buf_poll_cb(NULL, &dcb->cb);
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>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 00b55eaf45549ce26424224d069a091c7e5d8bac Mon Sep 17 00:00:00 2001
From: Sven Schnelle <svens(a)linux.ibm.com>
Date: Thu, 11 Nov 2021 10:58:26 +0100
Subject: [PATCH] s390/vdso: filter out -mstack-guard and -mstack-size
When CONFIG_VMAP_STACK is disabled, the user can enable CONFIG_STACK_CHECK,
which adds a stack overflow check to each C function in the kernel. This is
also done for functions in the vdso page. These functions are run in user
context and user stack sizes are usually different to what the kernel uses.
This might trigger the stack check although the stack size is valid.
Therefore filter the -mstack-guard and -mstack-size flags when compiling
vdso C files.
Cc: stable(a)kernel.org # 5.10+
Fixes: 4bff8cb54502 ("s390: convert to GENERIC_VDSO")
Reported-by: Janosch Frank <frankja(a)linux.ibm.com>
Signed-off-by: Sven Schnelle <svens(a)linux.ibm.com>
Reviewed-by: Heiko Carstens <hca(a)linux.ibm.com>
Signed-off-by: Heiko Carstens <hca(a)linux.ibm.com>
diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index 69c45f600273..609e3697324b 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -77,10 +77,12 @@ KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
ifneq ($(call cc-option,-mstack-size=8192 -mstack-guard=128),)
-cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
-ifeq ($(call cc-option,-mstack-size=8192),)
-cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
-endif
+ CC_FLAGS_CHECK_STACK := -mstack-size=$(STACK_SIZE)
+ ifeq ($(call cc-option,-mstack-size=8192),)
+ CC_FLAGS_CHECK_STACK += -mstack-guard=$(CONFIG_STACK_GUARD)
+ endif
+ export CC_FLAGS_CHECK_STACK
+ cflags-$(CONFIG_CHECK_STACK) += $(CC_FLAGS_CHECK_STACK)
endif
ifdef CONFIG_EXPOLINE
diff --git a/arch/s390/kernel/vdso64/Makefile b/arch/s390/kernel/vdso64/Makefile
index e7d911780935..9e2b95a222a9 100644
--- a/arch/s390/kernel/vdso64/Makefile
+++ b/arch/s390/kernel/vdso64/Makefile
@@ -8,8 +8,9 @@ ARCH_REL_TYPE_ABS += R_390_GOT|R_390_PLT
include $(srctree)/lib/vdso/Makefile
obj-vdso64 = vdso_user_wrapper.o note.o
obj-cvdso64 = vdso64_generic.o getcpu.o
-CFLAGS_REMOVE_getcpu.o = -pg $(CC_FLAGS_FTRACE) $(CC_FLAGS_EXPOLINE)
-CFLAGS_REMOVE_vdso64_generic.o = -pg $(CC_FLAGS_FTRACE) $(CC_FLAGS_EXPOLINE)
+VDSO_CFLAGS_REMOVE := -pg $(CC_FLAGS_FTRACE) $(CC_FLAGS_EXPOLINE) $(CC_FLAGS_CHECK_STACK)
+CFLAGS_REMOVE_getcpu.o = $(VDSO_CFLAGS_REMOVE)
+CFLAGS_REMOVE_vdso64_generic.o = $(VDSO_CFLAGS_REMOVE)
# Build rules
The patch below does not apply to the 5.4-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>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From f15863b27752682bb700c21de5f83f613a0fb77e Mon Sep 17 00:00:00 2001
From: Vandita Kulkarni <vandita.kulkarni(a)intel.com>
Date: Tue, 9 Nov 2021 17:34:28 +0530
Subject: [PATCH] Revert "drm/i915/tgl/dsi: Gate the ddi clocks after pll
mapping"
This reverts commit 991d9557b0c4 ("drm/i915/tgl/dsi: Gate the ddi clocks
after pll mapping"). The Bspec was updated recently with the pll ungate
sequence similar to that of icl dsi enable sequence. Hence reverting.
Bspec: 49187
Fixes: 991d9557b0c4 ("drm/i915/tgl/dsi: Gate the ddi clocks after pll mapping")
Cc: <stable(a)vger.kernel.org> # v5.4+
Signed-off-by: Vandita Kulkarni <vandita.kulkarni(a)intel.com>
Signed-off-by: Jani Nikula <jani.nikula(a)intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211109120428.15211-1-vandit…
(cherry picked from commit 4579509ef181480f4e4510d436c691519167c5c2)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi(a)intel.com>
diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c
index 168c84a74d30..00f270c41894 100644
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -696,10 +696,7 @@ static void gen11_dsi_map_pll(struct intel_encoder *encoder,
intel_de_write(dev_priv, ICL_DPCLKA_CFGCR0, val);
for_each_dsi_phy(phy, intel_dsi->phys) {
- if (DISPLAY_VER(dev_priv) >= 12)
- val |= ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy);
- else
- val &= ~ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy);
+ val &= ~ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy);
}
intel_de_write(dev_priv, ICL_DPCLKA_CFGCR0, val);
@@ -1135,8 +1132,6 @@ static void
gen11_dsi_enable_port_and_phy(struct intel_encoder *encoder,
const struct intel_crtc_state *crtc_state)
{
- struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
-
/* step 4a: power up all lanes of the DDI used by DSI */
gen11_dsi_power_up_lanes(encoder);
@@ -1162,8 +1157,7 @@ gen11_dsi_enable_port_and_phy(struct intel_encoder *encoder,
gen11_dsi_configure_transcoder(encoder, crtc_state);
/* Step 4l: Gate DDI clocks */
- if (DISPLAY_VER(dev_priv) == 11)
- gen11_dsi_gate_clocks(encoder);
+ gen11_dsi_gate_clocks(encoder);
}
static void gen11_dsi_powerup_panel(struct intel_encoder *encoder)
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>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From f15863b27752682bb700c21de5f83f613a0fb77e Mon Sep 17 00:00:00 2001
From: Vandita Kulkarni <vandita.kulkarni(a)intel.com>
Date: Tue, 9 Nov 2021 17:34:28 +0530
Subject: [PATCH] Revert "drm/i915/tgl/dsi: Gate the ddi clocks after pll
mapping"
This reverts commit 991d9557b0c4 ("drm/i915/tgl/dsi: Gate the ddi clocks
after pll mapping"). The Bspec was updated recently with the pll ungate
sequence similar to that of icl dsi enable sequence. Hence reverting.
Bspec: 49187
Fixes: 991d9557b0c4 ("drm/i915/tgl/dsi: Gate the ddi clocks after pll mapping")
Cc: <stable(a)vger.kernel.org> # v5.4+
Signed-off-by: Vandita Kulkarni <vandita.kulkarni(a)intel.com>
Signed-off-by: Jani Nikula <jani.nikula(a)intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211109120428.15211-1-vandit…
(cherry picked from commit 4579509ef181480f4e4510d436c691519167c5c2)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi(a)intel.com>
diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c
index 168c84a74d30..00f270c41894 100644
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -696,10 +696,7 @@ static void gen11_dsi_map_pll(struct intel_encoder *encoder,
intel_de_write(dev_priv, ICL_DPCLKA_CFGCR0, val);
for_each_dsi_phy(phy, intel_dsi->phys) {
- if (DISPLAY_VER(dev_priv) >= 12)
- val |= ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy);
- else
- val &= ~ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy);
+ val &= ~ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy);
}
intel_de_write(dev_priv, ICL_DPCLKA_CFGCR0, val);
@@ -1135,8 +1132,6 @@ static void
gen11_dsi_enable_port_and_phy(struct intel_encoder *encoder,
const struct intel_crtc_state *crtc_state)
{
- struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
-
/* step 4a: power up all lanes of the DDI used by DSI */
gen11_dsi_power_up_lanes(encoder);
@@ -1162,8 +1157,7 @@ gen11_dsi_enable_port_and_phy(struct intel_encoder *encoder,
gen11_dsi_configure_transcoder(encoder, crtc_state);
/* Step 4l: Gate DDI clocks */
- if (DISPLAY_VER(dev_priv) == 11)
- gen11_dsi_gate_clocks(encoder);
+ gen11_dsi_gate_clocks(encoder);
}
static void gen11_dsi_powerup_panel(struct intel_encoder *encoder)
This patchset is a backport of DAMON fixes that merged in the mainline,
for v5.15.x stable series.
SeongJae Park (2):
mm/damon/dbgfs: use '__GFP_NOWARN' for user-specified size buffer
allocation
mm/damon/dbgfs: fix missed use of damon_dbgfs_lock
mm/damon/dbgfs.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
--
2.17.1