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[PATCH 6/6] arm64: dts: qcom: x1e80100-qcp: fix nvme regulator boot glitch

by Johan Hovold

The NVMe regulator has been left enabled by the boot firmware. Mark it as such to avoid disabling the regulator temporarily during boot. Fixes: eb57cbe730d1 ("arm64: dts: qcom: x1e80100: Describe the PCIe 6a resources") Cc: stable(a)vger.kernel.org # 6.11 Cc: Abel Vesa <abel.vesa(a)linaro.org> Signed-off-by: Johan Hovold <johan+linaro(a)kernel.org> --- arch/arm64/boot/dts/qcom/x1e80100-qcp.dts | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/x1e80100-qcp.dts b/arch/arm64/boot/dts/qcom/x1e80100-qcp.dts index 1c3a6a7b3ed6..5ef030c60abe 100644 --- a/arch/arm64/boot/dts/qcom/x1e80100-qcp.dts +++ b/arch/arm64/boot/dts/qcom/x1e80100-qcp.dts @@ -253,6 +253,8 @@ vreg_nvme: regulator-nvme { pinctrl-names = "default"; pinctrl-0 = <&nvme_reg_en>; + + regulator-boot-on; }; }; -- 2.45.2

2 days, 21 hours

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[PATCH 4/6] arm64: dts: qcom: x1e80100-yoga-slim7x: fix nvme regulator boot glitch

by Johan Hovold

The NVMe regulator has been left enabled by the boot firmware. Mark it as such to avoid disabling the regulator temporarily during boot. Fixes: 45247fe17db2 ("arm64: dts: qcom: x1e80100: add Lenovo Thinkpad Yoga slim 7x devicetree") Cc: stable(a)vger.kernel.org # 6.11 Cc: Srinivas Kandagatla <srinivas.kandagatla(a)linaro.org> Signed-off-by: Johan Hovold <johan+linaro(a)kernel.org> --- arch/arm64/boot/dts/qcom/x1e80100-lenovo-yoga-slim7x.dts | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/x1e80100-lenovo-yoga-slim7x.dts b/arch/arm64/boot/dts/qcom/x1e80100-lenovo-yoga-slim7x.dts index 3c13331a9ef4..0cdaff9c8cf0 100644 --- a/arch/arm64/boot/dts/qcom/x1e80100-lenovo-yoga-slim7x.dts +++ b/arch/arm64/boot/dts/qcom/x1e80100-lenovo-yoga-slim7x.dts @@ -205,6 +205,8 @@ vreg_nvme: regulator-nvme { pinctrl-0 = <&nvme_reg_en>; pinctrl-names = "default"; + + regulator-boot-on; }; }; -- 2.45.2

2 days, 21 hours

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[PATCH 3/6] arm64: dts: qcom: x1e80100-vivobook-s15: fix nvme regulator boot glitch

by Johan Hovold

The NVMe regulator has been left enabled by the boot firmware. Mark it as such to avoid disabling the regulator temporarily during boot. Fixes: d0e2f8f62dff ("arm64: dts: qcom: Add device tree for ASUS Vivobook S 15") Cc: stable(a)vger.kernel.org # 6.11 Cc: Xilin Wu <wuxilin123(a)gmail.com> Signed-off-by: Johan Hovold <johan+linaro(a)kernel.org> --- arch/arm64/boot/dts/qcom/x1e80100-asus-vivobook-s15.dts | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/x1e80100-asus-vivobook-s15.dts b/arch/arm64/boot/dts/qcom/x1e80100-asus-vivobook-s15.dts index 20616bd4aa6c..fb4a48a1e2a8 100644 --- a/arch/arm64/boot/dts/qcom/x1e80100-asus-vivobook-s15.dts +++ b/arch/arm64/boot/dts/qcom/x1e80100-asus-vivobook-s15.dts @@ -134,6 +134,8 @@ vreg_nvme: regulator-nvme { pinctrl-0 = <&nvme_reg_en>; pinctrl-names = "default"; + + regulator-boot-on; }; }; -- 2.45.2

2 days, 21 hours

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[PATCH 2/6] arm64: dts: qcom: x1e80100-crd: fix nvme regulator boot glitch

by Johan Hovold

The NVMe regulator has been left enabled by the boot firmware. Mark it as such to avoid disabling the regulator temporarily during boot. Fixes: eb57cbe730d1 ("arm64: dts: qcom: x1e80100: Describe the PCIe 6a resources") Cc: stable(a)vger.kernel.org # 6.11 Cc: Abel Vesa <abel.vesa(a)linaro.org> Signed-off-by: Johan Hovold <johan+linaro(a)kernel.org> --- arch/arm64/boot/dts/qcom/x1e80100-crd.dts | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/x1e80100-crd.dts b/arch/arm64/boot/dts/qcom/x1e80100-crd.dts index 10b28d870f08..5d2eec8590ce 100644 --- a/arch/arm64/boot/dts/qcom/x1e80100-crd.dts +++ b/arch/arm64/boot/dts/qcom/x1e80100-crd.dts @@ -300,6 +300,8 @@ vreg_nvme: regulator-nvme { pinctrl-names = "default"; pinctrl-0 = <&nvme_reg_en>; + + regulator-boot-on; }; vreg_wwan: regulator-wwan { -- 2.45.2

2 days, 21 hours

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[PATCH] tools/nolibc/stdlib: fix getenv() with empty environment

by Thomas Weißschuh

The environ pointer itself is never NULL, this is guaranteed by crt.h. However if the environment is empty, environ will point to a NULL pointer. While this case will be checked by the loop later, this only happens after the first loop iteration. To avoid reading invalid memory inside the loop, fix the test that checks for an empty environment. Fixes: 077d0a392446 ("tools/nolibc/stdlib: add a simple getenv() implementation") Cc: stable(a)vger.kernel.org Signed-off-by: Thomas Weißschuh <thomas.weissschuh(a)linutronix.de> --- tools/include/nolibc/stdlib.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/include/nolibc/stdlib.h b/tools/include/nolibc/stdlib.h index 75aa273c23a6153db6a32facaea16457a522703b..c31967378cf1f699283d801487c1a91d17e4d1ce 100644 --- a/tools/include/nolibc/stdlib.h +++ b/tools/include/nolibc/stdlib.h @@ -90,7 +90,7 @@ char *getenv(const char *name) { int idx, i; - if (environ) { + if (*environ) { for (idx = 0; environ[idx]; idx++) { for (i = 0; name[i] && name[i] == environ[idx][i];) i++; --- base-commit: 2f87d0916ce0d2925cedbc9e8f5d6291ba2ac7b2 change-id: 20241016-nolibc-getenv-f99f4d3df2cd Best regards, -- Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>

2 days, 21 hours

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[PATCH 0/5] cxl: Initialization and shutdown fixes

by Dan Williams

Gregory's modest proposal to fix CXL cxl_mem_probe() failures due to delayed arrival of the CXL "root" infrastructure [1] prompted questions of how the existing mechanism for retrying cxl_mem_probe() could be failing. The critical missing piece in the debug was that Gregory's setup had almost all CXL modules built-in to the kernel. On the way to that discovery several other bugs and init-order corner cases were discovered. The main fix is to make sure the drivers/cxl/Makefile object order supports root CXL ports being fully initialized upon cxl_acpi_probe() exit. The modular case has some similar potential holes that are fixed with MODULE_SOFTDEP() and other fix ups. Finally, an attempt to update cxl_test to reproduce the original report resulted in the discovery of a separate long standing use after free bug in cxl_region_detach(). [1]: http://lore.kernel.org/20241004212504.1246-1-gourry@gourry.net --- Dan Williams (5): cxl/port: Fix CXL port initialization order when the subsystem is built-in cxl/port: Fix cxl_bus_rescan() vs bus_rescan_devices() cxl/acpi: Ensure ports ready at cxl_acpi_probe() return cxl/port: Fix use-after-free, permit out-of-order decoder shutdown cxl/test: Improve init-order fidelity relative to real-world systems drivers/base/core.c | 35 +++++++ drivers/cxl/Kconfig | 1 drivers/cxl/Makefile | 12 +-- drivers/cxl/acpi.c | 7 + drivers/cxl/core/hdm.c | 50 +++++++++-- drivers/cxl/core/port.c | 13 ++- drivers/cxl/core/region.c | 48 +++------- drivers/cxl/cxl.h | 3 - include/linux/device.h | 3 + tools/testing/cxl/test/cxl.c | 200 +++++++++++++++++++++++------------------- tools/testing/cxl/test/mem.c | 1 11 files changed, 228 insertions(+), 145 deletions(-) base-commit: 8cf0b93919e13d1e8d4466eb4080a4c4d9d66d7b

2 days, 21 hours

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[PATCH ath-current] wifi: ath10k: Fix memory leak in management tx

by Manikanta Pubbisetty

In the current logic, memory is allocated for storing the MSDU context during management packet TX but this memory is not being freed during management TX completion. Similar leaks are seen in the management TX cleanup logic. Kmemleak reports this problem as below, unreferenced object 0xffffff80b64ed250 (size 16): comm "kworker/u16:7", pid 148, jiffies 4294687130 (age 714.199s) hex dump (first 16 bytes): 00 2b d8 d8 80 ff ff ff c4 74 e9 fd 07 00 00 00 .+.......t...... backtrace: [<ffffffe6e7b245dc>] __kmem_cache_alloc_node+0x1e4/0x2d8 [<ffffffe6e7adde88>] kmalloc_trace+0x48/0x110 [<ffffffe6bbd765fc>] ath10k_wmi_tlv_op_gen_mgmt_tx_send+0xd4/0x1d8 [ath10k_core] [<ffffffe6bbd3eed4>] ath10k_mgmt_over_wmi_tx_work+0x134/0x298 [ath10k_core] [<ffffffe6e78d5974>] process_scheduled_works+0x1ac/0x400 [<ffffffe6e78d60b8>] worker_thread+0x208/0x328 [<ffffffe6e78dc890>] kthread+0x100/0x1c0 [<ffffffe6e78166c0>] ret_from_fork+0x10/0x20 Free the memory during completion and cleanup to fix the leak. Protect the mgmt_pending_tx idr_remove() operation in ath10k_wmi_tlv_op_cleanup_mgmt_tx_send() using ar->data_lock similar to other instances. Tested-on: WCN3990 hw1.0 SNOC WLAN.HL.2.0-01387-QCAHLSWMTPLZ-1 Fixes: dc405152bb64 ("ath10k: handle mgmt tx completion event") Fixes: c730c477176a ("ath10k: Remove msdu from idr when management pkt send fails") Cc: stable(a)vger.kernel.org Signed-off-by: Manikanta Pubbisetty <quic_mpubbise(a)quicinc.com> --- drivers/net/wireless/ath/ath10k/wmi-tlv.c | 7 ++++++- drivers/net/wireless/ath/ath10k/wmi.c | 2 ++ 2 files changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath10k/wmi-tlv.c b/drivers/net/wireless/ath/ath10k/wmi-tlv.c index dbaf26d6a7a6..16d07d619b4d 100644 --- a/drivers/net/wireless/ath/ath10k/wmi-tlv.c +++ b/drivers/net/wireless/ath/ath10k/wmi-tlv.c @@ -3043,9 +3043,14 @@ ath10k_wmi_tlv_op_cleanup_mgmt_tx_send(struct ath10k *ar, struct sk_buff *msdu) { struct ath10k_skb_cb *cb = ATH10K_SKB_CB(msdu); + struct ath10k_mgmt_tx_pkt_addr *pkt_addr; struct ath10k_wmi *wmi = &ar->wmi; - idr_remove(&wmi->mgmt_pending_tx, cb->msdu_id); + spin_lock_bh(&ar->data_lock); + pkt_addr = idr_remove(&wmi->mgmt_pending_tx, cb->msdu_id); + spin_unlock_bh(&ar->data_lock); + + kfree(pkt_addr); return 0; } diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c index 4861179b2217..5e061f7525a6 100644 --- a/drivers/net/wireless/ath/ath10k/wmi.c +++ b/drivers/net/wireless/ath/ath10k/wmi.c @@ -2441,6 +2441,7 @@ wmi_process_mgmt_tx_comp(struct ath10k *ar, struct mgmt_tx_compl_params *param) dma_unmap_single(ar->dev, pkt_addr->paddr, msdu->len, DMA_TO_DEVICE); info = IEEE80211_SKB_CB(msdu); + kfree(pkt_addr); if (param->status) { info->flags &= ~IEEE80211_TX_STAT_ACK; @@ -9612,6 +9613,7 @@ static int ath10k_wmi_mgmt_tx_clean_up_pending(int msdu_id, void *ptr, dma_unmap_single(ar->dev, pkt_addr->paddr, msdu->len, DMA_TO_DEVICE); ieee80211_free_txskb(ar->hw, msdu); + kfree(pkt_addr); return 0; } -- 2.17.1

2 days, 21 hours

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[PATCH 4/4] xhci: dbc: honor usb transfer size boundaries.

by Mathias Nyman

Treat each completed full size write to /dev/ttyDBC0 as a separate usb transfer. Make sure the size of the TRBs matches the size of the tty write by first queuing as many max packet size TRBs as possible up to the last TRB which will be cut short to match the size of the tty write. This solves an issue where userspace writes several transfers back to back via /dev/ttyDBC0 into a kfifo before dbgtty can find available request to turn that kfifo data into TRBs on the transfer ring. The boundary between transfer was lost as xhci-dbgtty then turned everyting in the kfifo into as many 'max packet size' TRBs as possible. DbC would then send more data to the host than intended for that transfer, causing host to issue a babble error. Refuse to write more data to kfifo until previous tty write data is turned into properly sized TRBs with data size boundaries matching tty write size Tested-by: Uday M Bhat <uday.m.bhat(a)intel.com> Tested-by: Łukasz Bartosik <ukaszb(a)chromium.org> Cc: <stable(a)vger.kernel.org> Signed-off-by: Mathias Nyman <mathias.nyman(a)linux.intel.com> --- drivers/usb/host/xhci-dbgcap.h | 1 + drivers/usb/host/xhci-dbgtty.c | 55 ++++++++++++++++++++++++++++++---- 2 files changed, 51 insertions(+), 5 deletions(-) diff --git a/drivers/usb/host/xhci-dbgcap.h b/drivers/usb/host/xhci-dbgcap.h index 8ec813b6e9fd..9dc8f4d8077c 100644 --- a/drivers/usb/host/xhci-dbgcap.h +++ b/drivers/usb/host/xhci-dbgcap.h @@ -110,6 +110,7 @@ struct dbc_port { struct tasklet_struct push; struct list_head write_pool; + unsigned int tx_boundary; bool registered; }; diff --git a/drivers/usb/host/xhci-dbgtty.c b/drivers/usb/host/xhci-dbgtty.c index b8e78867e25a..d719c16ea30b 100644 --- a/drivers/usb/host/xhci-dbgtty.c +++ b/drivers/usb/host/xhci-dbgtty.c @@ -24,6 +24,29 @@ static inline struct dbc_port *dbc_to_port(struct xhci_dbc *dbc) return dbc->priv; } +static unsigned int +dbc_kfifo_to_req(struct dbc_port *port, char *packet) +{ + unsigned int len; + + len = kfifo_len(&port->port.xmit_fifo); + + if (len == 0) + return 0; + + len = min(len, DBC_MAX_PACKET); + + if (port->tx_boundary) + len = min(port->tx_boundary, len); + + len = kfifo_out(&port->port.xmit_fifo, packet, len); + + if (port->tx_boundary) + port->tx_boundary -= len; + + return len; +} + static int dbc_start_tx(struct dbc_port *port) __releases(&port->port_lock) __acquires(&port->port_lock) @@ -36,7 +59,7 @@ static int dbc_start_tx(struct dbc_port *port) while (!list_empty(pool)) { req = list_entry(pool->next, struct dbc_request, list_pool); - len = kfifo_out(&port->port.xmit_fifo, req->buf, DBC_MAX_PACKET); + len = dbc_kfifo_to_req(port, req->buf); if (len == 0) break; do_tty_wake = true; @@ -200,14 +223,32 @@ static ssize_t dbc_tty_write(struct tty_struct *tty, const u8 *buf, { struct dbc_port *port = tty->driver_data; unsigned long flags; + unsigned int written = 0; spin_lock_irqsave(&port->port_lock, flags); - if (count) - count = kfifo_in(&port->port.xmit_fifo, buf, count); - dbc_start_tx(port); + + /* + * Treat tty write as one usb transfer. Make sure the writes are turned + * into TRB request having the same size boundaries as the tty writes. + * Don't add data to kfifo before previous write is turned into TRBs + */ + if (port->tx_boundary) { + spin_unlock_irqrestore(&port->port_lock, flags); + return 0; + } + + if (count) { + written = kfifo_in(&port->port.xmit_fifo, buf, count); + + if (written == count) + port->tx_boundary = kfifo_len(&port->port.xmit_fifo); + + dbc_start_tx(port); + } + spin_unlock_irqrestore(&port->port_lock, flags); - return count; + return written; } static int dbc_tty_put_char(struct tty_struct *tty, u8 ch) @@ -241,6 +282,10 @@ static unsigned int dbc_tty_write_room(struct tty_struct *tty) spin_lock_irqsave(&port->port_lock, flags); room = kfifo_avail(&port->port.xmit_fifo); + + if (port->tx_boundary) + room = 0; + spin_unlock_irqrestore(&port->port_lock, flags); return room; -- 2.25.1

2 days, 22 hours

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[PATCH 1/4] xhci: Fix incorrect stream context type macro

by Mathias Nyman

The stream contex type (SCT) bitfield is used both in the stream context data structure, and in the 'Set TR Dequeue pointer' command TRB. In both cases it uses bits 3:1 The SCT_FOR_TRB(p) macro used to set the stream context type (SCT) field for the 'Set TR Dequeue pointer' command TRB incorrectly shifts the value 1 bit left before masking the three bits. Fix this by first masking and rshifting, just like the similar SCT_FOR_CTX(p) macro does This issue has not been visibile as the lost bit 3 is only used with secondary stream arrays (SSA). Xhci driver currently only supports using a primary stream array with Linear stream addressing. Fixes: 95241dbdf828 ("xhci: Set SCT field for Set TR dequeue on streams") Cc: stable(a)vger.kernel.org Signed-off-by: Mathias Nyman <mathias.nyman(a)linux.intel.com> --- drivers/usb/host/xhci.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 620502de971a..f0fb696d5619 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1001,7 +1001,7 @@ enum xhci_setup_dev { /* Set TR Dequeue Pointer command TRB fields, 6.4.3.9 */ #define TRB_TO_STREAM_ID(p) ((((p) & (0xffff << 16)) >> 16)) #define STREAM_ID_FOR_TRB(p) ((((p)) & 0xffff) << 16) -#define SCT_FOR_TRB(p) (((p) << 1) & 0x7) +#define SCT_FOR_TRB(p) (((p) & 0x7) << 1) /* Link TRB specific fields */ #define TRB_TC (1<<1) -- 2.25.1

2 days, 22 hours

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[PATCH v4 2/2] staging: vchiq_arm: Use devm_kzalloc() for drv_mgmt allocation

by Umang Jain

The struct drv_mgmt 'mgmt' is currently allocated dynamically using kzalloc(). Unfortunately, it is subjected to memory leaks in the error handling paths of the probe() function. To address this issue, use device resource management helper devm_kzalloc(), to ensure cleanup after the allocation. Cc: stable(a)vger.kernel.org Fixes: 1c9e16b73166 ("staging: vc04_services: vchiq_arm: Split driver static and runtime data") Signed-off-by: Umang Jain <umang.jain(a)ideasonboard.com> Reviewed-by: Dan Carpenter <dan.carpenter(a)linaro.org> --- drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c index 7ece82c361ee..8412be7183fc 100644 --- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c +++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c @@ -1343,7 +1343,7 @@ static int vchiq_probe(struct platform_device *pdev) return -ENOENT; } - mgmt = kzalloc(sizeof(*mgmt), GFP_KERNEL); + mgmt = devm_kzalloc(&pdev->dev, sizeof(*mgmt), GFP_KERNEL); if (!mgmt) return -ENOMEM; @@ -1397,8 +1397,6 @@ static void vchiq_remove(struct platform_device *pdev) arm_state = vchiq_platform_get_arm_state(&mgmt->state); kthread_stop(arm_state->ka_thread); - - kfree(mgmt); } static struct platform_driver vchiq_driver = { -- 2.45.2

2 days, 23 hours

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