* [PATCH v5 0/2] Remove useless param of devcoredump functions and fix bugs
@ 2022-06-03 5:09 Duoming Zhou
2022-06-03 5:09 ` [PATCH v5 1/2] devcoredump: remove the useless gfp_t parameter in dev_coredumpv and dev_coredumpm Duoming Zhou
2022-06-03 5:09 ` [PATCH v5 2/2] mwifiex: fix sleep in atomic context bugs caused by dev_coredumpv Duoming Zhou
0 siblings, 2 replies; 6+ messages in thread
From: Duoming Zhou @ 2022-06-03 5:09 UTC (permalink / raw)
To: linux-wireless, linux-kernel
Cc: amitkarwar, ganapathi017, sharvari.harisangam, huxinming820,
kvalo, davem, edumazet, kuba, pabeni, netdev, johannes, gregkh,
rafael, Duoming Zhou
The first patch removes the extra gfp_t param of dev_coredumpv()
and dev_coredumpm().
The second patch fix sleep in atomic context bugs of mwifiex
caused by dev_coredumpv().
Duoming Zhou (2):
devcoredump: remove the useless gfp_t parameter in dev_coredumpv and
dev_coredumpm
mwifiex: fix sleep in atomic context bugs caused by dev_coredumpv
drivers/base/devcoredump.c | 16 ++++++----------
drivers/bluetooth/btmrvl_sdio.c | 2 +-
drivers/bluetooth/hci_qca.c | 2 +-
drivers/gpu/drm/etnaviv/etnaviv_dump.c | 2 +-
drivers/gpu/drm/msm/disp/msm_disp_snapshot.c | 4 ++--
drivers/gpu/drm/msm/msm_gpu.c | 4 ++--
drivers/media/platform/qcom/venus/core.c | 2 +-
drivers/net/can/spi/mcp251xfd/mcp251xfd-dump.c | 2 +-
drivers/net/wireless/ath/ath10k/coredump.c | 2 +-
.../net/wireless/ath/wil6210/wil_crash_dump.c | 2 +-
.../wireless/broadcom/brcm80211/brcmfmac/debug.c | 2 +-
drivers/net/wireless/intel/iwlwifi/fw/dbg.c | 6 ++----
drivers/net/wireless/marvell/mwifiex/init.c | 10 ++++++----
drivers/net/wireless/marvell/mwifiex/main.c | 3 +--
drivers/net/wireless/marvell/mwifiex/main.h | 2 +-
drivers/net/wireless/marvell/mwifiex/sta_event.c | 6 +++---
drivers/net/wireless/mediatek/mt76/mt7615/mac.c | 3 +--
drivers/net/wireless/mediatek/mt76/mt7921/mac.c | 3 +--
drivers/net/wireless/realtek/rtw88/main.c | 2 +-
drivers/net/wireless/realtek/rtw89/ser.c | 2 +-
drivers/remoteproc/qcom_q6v5_mss.c | 2 +-
drivers/remoteproc/remoteproc_coredump.c | 8 ++++----
include/drm/drm_print.h | 2 +-
include/linux/devcoredump.h | 13 ++++++-------
sound/soc/intel/avs/apl.c | 2 +-
sound/soc/intel/avs/skl.c | 2 +-
sound/soc/intel/catpt/dsp.c | 2 +-
27 files changed, 50 insertions(+), 58 deletions(-)
--
2.17.1
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH v5 1/2] devcoredump: remove the useless gfp_t parameter in dev_coredumpv and dev_coredumpm
2022-06-03 5:09 [PATCH v5 0/2] Remove useless param of devcoredump functions and fix bugs Duoming Zhou
@ 2022-06-03 5:09 ` Duoming Zhou
2022-06-06 18:17 ` Brian Norris
2022-06-03 5:09 ` [PATCH v5 2/2] mwifiex: fix sleep in atomic context bugs caused by dev_coredumpv Duoming Zhou
1 sibling, 1 reply; 6+ messages in thread
From: Duoming Zhou @ 2022-06-03 5:09 UTC (permalink / raw)
To: linux-wireless, linux-kernel
Cc: amitkarwar, ganapathi017, sharvari.harisangam, huxinming820,
kvalo, davem, edumazet, kuba, pabeni, netdev, johannes, gregkh,
rafael, Duoming Zhou
The dev_coredumpv() and dev_coredumpm() could not be used in atomic
context, because they call kvasprintf_const() and kstrdup() with
GFP_KERNEL parameter. The process is shown below:
dev_coredumpv(.., gfp_t gfp)
dev_coredumpm(.., gfp_t gfp)
dev_set_name
kobject_set_name_vargs
kvasprintf_const(GFP_KERNEL, ...); //may sleep
kstrdup(s, GFP_KERNEL); //may sleep
This patch removes gfp_t parameter of dev_coredumpv() and dev_coredumpm()
and changes the gfp_t parameter of kzalloc() in dev_coredumpm() to
GFP_KERNEL in order to show they could not be used in atomic context.
Fixes: 833c95456a70 ("device coredump: add new device coredump class")
Signed-off-by: Duoming Zhou <duoming@zju.edu.cn>
---
Changes in v5:
- Drop gfp_t parameter of dev_coredumpv() and dev_coredumpm().
drivers/base/devcoredump.c | 16 ++++++----------
drivers/bluetooth/btmrvl_sdio.c | 2 +-
drivers/bluetooth/hci_qca.c | 2 +-
drivers/gpu/drm/etnaviv/etnaviv_dump.c | 2 +-
drivers/gpu/drm/msm/disp/msm_disp_snapshot.c | 4 ++--
drivers/gpu/drm/msm/msm_gpu.c | 4 ++--
drivers/media/platform/qcom/venus/core.c | 2 +-
drivers/net/can/spi/mcp251xfd/mcp251xfd-dump.c | 2 +-
drivers/net/wireless/ath/ath10k/coredump.c | 2 +-
.../net/wireless/ath/wil6210/wil_crash_dump.c | 2 +-
.../wireless/broadcom/brcm80211/brcmfmac/debug.c | 2 +-
drivers/net/wireless/intel/iwlwifi/fw/dbg.c | 6 ++----
drivers/net/wireless/marvell/mwifiex/main.c | 3 +--
drivers/net/wireless/mediatek/mt76/mt7615/mac.c | 3 +--
drivers/net/wireless/mediatek/mt76/mt7921/mac.c | 3 +--
drivers/net/wireless/realtek/rtw88/main.c | 2 +-
drivers/net/wireless/realtek/rtw89/ser.c | 2 +-
drivers/remoteproc/qcom_q6v5_mss.c | 2 +-
drivers/remoteproc/remoteproc_coredump.c | 8 ++++----
include/drm/drm_print.h | 2 +-
include/linux/devcoredump.h | 13 ++++++-------
sound/soc/intel/avs/apl.c | 2 +-
sound/soc/intel/avs/skl.c | 2 +-
sound/soc/intel/catpt/dsp.c | 2 +-
24 files changed, 40 insertions(+), 50 deletions(-)
diff --git a/drivers/base/devcoredump.c b/drivers/base/devcoredump.c
index f4d794d6bb8..8535f0bd5df 100644
--- a/drivers/base/devcoredump.c
+++ b/drivers/base/devcoredump.c
@@ -173,15 +173,13 @@ static void devcd_freev(void *data)
* @dev: the struct device for the crashed device
* @data: vmalloc data containing the device coredump
* @datalen: length of the data
- * @gfp: allocation flags
*
* This function takes ownership of the vmalloc'ed data and will free
* it when it is no longer used. See dev_coredumpm() for more information.
*/
-void dev_coredumpv(struct device *dev, void *data, size_t datalen,
- gfp_t gfp)
+void dev_coredumpv(struct device *dev, void *data, size_t datalen)
{
- dev_coredumpm(dev, NULL, data, datalen, gfp, devcd_readv, devcd_freev);
+ dev_coredumpm(dev, NULL, data, datalen, devcd_readv, devcd_freev);
}
EXPORT_SYMBOL_GPL(dev_coredumpv);
@@ -236,7 +234,6 @@ static ssize_t devcd_read_from_sgtable(char *buffer, loff_t offset,
* @owner: the module that contains the read/free functions, use %THIS_MODULE
* @data: data cookie for the @read/@free functions
* @datalen: length of the data
- * @gfp: allocation flags
* @read: function to read from the given buffer
* @free: function to free the given buffer
*
@@ -246,7 +243,7 @@ static ssize_t devcd_read_from_sgtable(char *buffer, loff_t offset,
* function will be called to free the data.
*/
void dev_coredumpm(struct device *dev, struct module *owner,
- void *data, size_t datalen, gfp_t gfp,
+ void *data, size_t datalen,
ssize_t (*read)(char *buffer, loff_t offset, size_t count,
void *data, size_t datalen),
void (*free)(void *data))
@@ -268,7 +265,7 @@ void dev_coredumpm(struct device *dev, struct module *owner,
if (!try_module_get(owner))
goto free;
- devcd = kzalloc(sizeof(*devcd), gfp);
+ devcd = kzalloc(sizeof(*devcd), GFP_KERNEL);
if (!devcd)
goto put_module;
@@ -318,7 +315,6 @@ EXPORT_SYMBOL_GPL(dev_coredumpm);
* @dev: the struct device for the crashed device
* @table: the dump data
* @datalen: length of the data
- * @gfp: allocation flags
*
* Creates a new device coredump for the given device. If a previous one hasn't
* been read yet, the new coredump is discarded. The data lifetime is determined
@@ -326,9 +322,9 @@ EXPORT_SYMBOL_GPL(dev_coredumpm);
* it will free the data.
*/
void dev_coredumpsg(struct device *dev, struct scatterlist *table,
- size_t datalen, gfp_t gfp)
+ size_t datalen)
{
- dev_coredumpm(dev, NULL, table, datalen, gfp, devcd_read_from_sgtable,
+ dev_coredumpm(dev, NULL, table, datalen, devcd_read_from_sgtable,
devcd_free_sgtable);
}
EXPORT_SYMBOL_GPL(dev_coredumpsg);
diff --git a/drivers/bluetooth/btmrvl_sdio.c b/drivers/bluetooth/btmrvl_sdio.c
index b8ef66f89fc..9b9728719db 100644
--- a/drivers/bluetooth/btmrvl_sdio.c
+++ b/drivers/bluetooth/btmrvl_sdio.c
@@ -1515,7 +1515,7 @@ static void btmrvl_sdio_coredump(struct device *dev)
/* fw_dump_data will be free in device coredump release function
* after 5 min
*/
- dev_coredumpv(&card->func->dev, fw_dump_data, fw_dump_len, GFP_KERNEL);
+ dev_coredumpv(&card->func->dev, fw_dump_data, fw_dump_len);
BT_INFO("== btmrvl firmware dump to /sys/class/devcoredump end");
}
diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index eab34e24d94..2e4074211ae 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -1120,7 +1120,7 @@ static void qca_controller_memdump(struct work_struct *work)
qca_memdump->ram_dump_size);
memdump_buf = qca_memdump->memdump_buf_head;
dev_coredumpv(&hu->serdev->dev, memdump_buf,
- qca_memdump->received_dump, GFP_KERNEL);
+ qca_memdump->received_dump);
cancel_delayed_work(&qca->ctrl_memdump_timeout);
kfree(qca->qca_memdump);
qca->qca_memdump = NULL;
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_dump.c b/drivers/gpu/drm/etnaviv/etnaviv_dump.c
index f418e0b7577..519fcb234b3 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_dump.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_dump.c
@@ -225,5 +225,5 @@ void etnaviv_core_dump(struct etnaviv_gem_submit *submit)
etnaviv_core_dump_header(&iter, ETDUMP_BUF_END, iter.data);
- dev_coredumpv(gpu->dev, iter.start, iter.data - iter.start, GFP_KERNEL);
+ dev_coredumpv(gpu->dev, iter.start, iter.data - iter.start);
}
diff --git a/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c
index e75b97127c0..f057d294c30 100644
--- a/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c
+++ b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c
@@ -74,8 +74,8 @@ static void _msm_disp_snapshot_work(struct kthread_work *work)
* If there is a codedump pending for the device, the dev_coredumpm()
* will also free new coredump state.
*/
- dev_coredumpm(disp_state->dev, THIS_MODULE, disp_state, 0, GFP_KERNEL,
- disp_devcoredump_read, msm_disp_state_free);
+ dev_coredumpm(disp_state->dev, THIS_MODULE, disp_state, 0,
+ disp_devcoredump_read, msm_disp_state_free);
}
void msm_disp_snapshot_state(struct drm_device *drm_dev)
diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c
index eb8a6663f30..30576ced0a0 100644
--- a/drivers/gpu/drm/msm/msm_gpu.c
+++ b/drivers/gpu/drm/msm/msm_gpu.c
@@ -317,8 +317,8 @@ static void msm_gpu_crashstate_capture(struct msm_gpu *gpu,
gpu->crashstate = state;
/* FIXME: Release the crashstate if this errors out? */
- dev_coredumpm(gpu->dev->dev, THIS_MODULE, gpu, 0, GFP_KERNEL,
- msm_gpu_devcoredump_read, msm_gpu_devcoredump_free);
+ dev_coredumpm(gpu->dev->dev, THIS_MODULE, gpu, 0,
+ msm_gpu_devcoredump_read, msm_gpu_devcoredump_free);
}
#else
static void msm_gpu_crashstate_capture(struct msm_gpu *gpu,
diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
index 877eca12580..db84dfb3fb1 100644
--- a/drivers/media/platform/qcom/venus/core.c
+++ b/drivers/media/platform/qcom/venus/core.c
@@ -49,7 +49,7 @@ static void venus_coredump(struct venus_core *core)
memcpy(data, mem_va, mem_size);
memunmap(mem_va);
- dev_coredumpv(dev, data, mem_size, GFP_KERNEL);
+ dev_coredumpv(dev, data, mem_size);
}
static void venus_event_notify(struct venus_core *core, u32 event)
diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-dump.c b/drivers/net/can/spi/mcp251xfd/mcp251xfd-dump.c
index c991b30bc9f..fa520ab7c96 100644
--- a/drivers/net/can/spi/mcp251xfd/mcp251xfd-dump.c
+++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-dump.c
@@ -281,5 +281,5 @@ void mcp251xfd_dump(const struct mcp251xfd_priv *priv)
mcp251xfd_dump_end(priv, &iter);
dev_coredumpv(&priv->spi->dev, iter.start,
- iter.data - iter.start, GFP_KERNEL);
+ iter.data - iter.start);
}
diff --git a/drivers/net/wireless/ath/ath10k/coredump.c b/drivers/net/wireless/ath/ath10k/coredump.c
index fe6b6f97a91..dc923706992 100644
--- a/drivers/net/wireless/ath/ath10k/coredump.c
+++ b/drivers/net/wireless/ath/ath10k/coredump.c
@@ -1607,7 +1607,7 @@ int ath10k_coredump_submit(struct ath10k *ar)
return -ENODATA;
}
- dev_coredumpv(ar->dev, dump, le32_to_cpu(dump->len), GFP_KERNEL);
+ dev_coredumpv(ar->dev, dump, le32_to_cpu(dump->len));
return 0;
}
diff --git a/drivers/net/wireless/ath/wil6210/wil_crash_dump.c b/drivers/net/wireless/ath/wil6210/wil_crash_dump.c
index 89c12cb2aaa..79299609dd6 100644
--- a/drivers/net/wireless/ath/wil6210/wil_crash_dump.c
+++ b/drivers/net/wireless/ath/wil6210/wil_crash_dump.c
@@ -117,6 +117,6 @@ void wil_fw_core_dump(struct wil6210_priv *wil)
/* fw_dump_data will be free in device coredump release function
* after 5 min
*/
- dev_coredumpv(wil_to_dev(wil), fw_dump_data, fw_dump_size, GFP_KERNEL);
+ dev_coredumpv(wil_to_dev(wil), fw_dump_data, fw_dump_size);
wil_info(wil, "fw core dumped, size %d bytes\n", fw_dump_size);
}
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/debug.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/debug.c
index eecf8a38d94..87f3652ef3b 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/debug.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/debug.c
@@ -37,7 +37,7 @@ int brcmf_debug_create_memdump(struct brcmf_bus *bus, const void *data,
return err;
}
- dev_coredumpv(bus->dev, dump, len + ramsize, GFP_KERNEL);
+ dev_coredumpv(bus->dev, dump, len + ramsize);
return 0;
}
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
index abf49022edb..f2f7cf494a8 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
@@ -2601,8 +2601,7 @@ static void iwl_fw_error_dump(struct iwl_fw_runtime *fwrt,
fw_error_dump.trans_ptr->data,
fw_error_dump.trans_ptr->len,
fw_error_dump.fwrt_len);
- dev_coredumpsg(fwrt->trans->dev, sg_dump_data, file_len,
- GFP_KERNEL);
+ dev_coredumpsg(fwrt->trans->dev, sg_dump_data, file_len);
}
vfree(fw_error_dump.fwrt_ptr);
vfree(fw_error_dump.trans_ptr);
@@ -2647,8 +2646,7 @@ static void iwl_fw_error_ini_dump(struct iwl_fw_runtime *fwrt,
entry->data, entry->size, offs);
offs += entry->size;
}
- dev_coredumpsg(fwrt->trans->dev, sg_dump_data, file_len,
- GFP_KERNEL);
+ dev_coredumpsg(fwrt->trans->dev, sg_dump_data, file_len);
}
iwl_dump_ini_list_free(&dump_list);
}
diff --git a/drivers/net/wireless/marvell/mwifiex/main.c b/drivers/net/wireless/marvell/mwifiex/main.c
index ace7371c477..26fef0ab1b0 100644
--- a/drivers/net/wireless/marvell/mwifiex/main.c
+++ b/drivers/net/wireless/marvell/mwifiex/main.c
@@ -1115,8 +1115,7 @@ void mwifiex_upload_device_dump(struct mwifiex_adapter *adapter)
*/
mwifiex_dbg(adapter, MSG,
"== mwifiex dump information to /sys/class/devcoredump start\n");
- dev_coredumpv(adapter->dev, adapter->devdump_data, adapter->devdump_len,
- GFP_KERNEL);
+ dev_coredumpv(adapter->dev, adapter->devdump_data, adapter->devdump_len);
mwifiex_dbg(adapter, MSG,
"== mwifiex dump information to /sys/class/devcoredump end\n");
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
index bd687f7de62..5336fe8c668 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
@@ -2421,6 +2421,5 @@ void mt7615_coredump_work(struct work_struct *work)
dev_kfree_skb(skb);
}
- dev_coredumpv(dev->mt76.dev, dump, MT76_CONNAC_COREDUMP_SZ,
- GFP_KERNEL);
+ dev_coredumpv(dev->mt76.dev, dump, MT76_CONNAC_COREDUMP_SZ);
}
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
index a630ddbf19e..cac284f95ce 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
@@ -1630,8 +1630,7 @@ void mt7921_coredump_work(struct work_struct *work)
}
if (dump)
- dev_coredumpv(dev->mt76.dev, dump, MT76_CONNAC_COREDUMP_SZ,
- GFP_KERNEL);
+ dev_coredumpv(dev->mt76.dev, dump, MT76_CONNAC_COREDUMP_SZ);
mt7921_reset(&dev->mt76);
}
diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c
index efabd5b1bf5..a276544cecd 100644
--- a/drivers/net/wireless/realtek/rtw88/main.c
+++ b/drivers/net/wireless/realtek/rtw88/main.c
@@ -414,7 +414,7 @@ static void rtw_fwcd_dump(struct rtw_dev *rtwdev)
* framework. Note that a new dump will be discarded if a previous one
* hasn't been released yet.
*/
- dev_coredumpv(rtwdev->dev, desc->data, desc->size, GFP_KERNEL);
+ dev_coredumpv(rtwdev->dev, desc->data, desc->size);
}
static void rtw_fwcd_free(struct rtw_dev *rtwdev, bool free_self)
diff --git a/drivers/net/wireless/realtek/rtw89/ser.c b/drivers/net/wireless/realtek/rtw89/ser.c
index 9e95ed97271..d28fe01ad72 100644
--- a/drivers/net/wireless/realtek/rtw89/ser.c
+++ b/drivers/net/wireless/realtek/rtw89/ser.c
@@ -127,7 +127,7 @@ static void rtw89_ser_cd_send(struct rtw89_dev *rtwdev,
* will be discarded if a previous one hasn't been released by
* framework yet.
*/
- dev_coredumpv(rtwdev->dev, buf, sizeof(*buf), GFP_KERNEL);
+ dev_coredumpv(rtwdev->dev, buf, sizeof(*buf));
}
static void rtw89_ser_cd_free(struct rtw89_dev *rtwdev,
diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c
index af217de75e4..813d87faef6 100644
--- a/drivers/remoteproc/qcom_q6v5_mss.c
+++ b/drivers/remoteproc/qcom_q6v5_mss.c
@@ -597,7 +597,7 @@ static void q6v5_dump_mba_logs(struct q6v5 *qproc)
data = vmalloc(MBA_LOG_SIZE);
if (data) {
memcpy(data, mba_region, MBA_LOG_SIZE);
- dev_coredumpv(&rproc->dev, data, MBA_LOG_SIZE, GFP_KERNEL);
+ dev_coredumpv(&rproc->dev, data, MBA_LOG_SIZE);
}
memunmap(mba_region);
}
diff --git a/drivers/remoteproc/remoteproc_coredump.c b/drivers/remoteproc/remoteproc_coredump.c
index 4b093420d98..cd55c2abd22 100644
--- a/drivers/remoteproc/remoteproc_coredump.c
+++ b/drivers/remoteproc/remoteproc_coredump.c
@@ -309,7 +309,7 @@ void rproc_coredump(struct rproc *rproc)
phdr += elf_size_of_phdr(class);
}
if (dump_conf == RPROC_COREDUMP_ENABLED) {
- dev_coredumpv(&rproc->dev, data, data_size, GFP_KERNEL);
+ dev_coredumpv(&rproc->dev, data, data_size);
return;
}
@@ -318,7 +318,7 @@ void rproc_coredump(struct rproc *rproc)
dump_state.header = data;
init_completion(&dump_state.dump_done);
- dev_coredumpm(&rproc->dev, NULL, &dump_state, data_size, GFP_KERNEL,
+ dev_coredumpm(&rproc->dev, NULL, &dump_state, data_size,
rproc_coredump_read, rproc_coredump_free);
/*
@@ -449,7 +449,7 @@ void rproc_coredump_using_sections(struct rproc *rproc)
}
if (dump_conf == RPROC_COREDUMP_ENABLED) {
- dev_coredumpv(&rproc->dev, data, data_size, GFP_KERNEL);
+ dev_coredumpv(&rproc->dev, data, data_size);
return;
}
@@ -458,7 +458,7 @@ void rproc_coredump_using_sections(struct rproc *rproc)
dump_state.header = data;
init_completion(&dump_state.dump_done);
- dev_coredumpm(&rproc->dev, NULL, &dump_state, data_size, GFP_KERNEL,
+ dev_coredumpm(&rproc->dev, NULL, &dump_state, data_size,
rproc_coredump_read, rproc_coredump_free);
/* Wait until the dump is read and free is called. Data is freed
diff --git a/include/drm/drm_print.h b/include/drm/drm_print.h
index 22fabdeed29..b41850366bc 100644
--- a/include/drm/drm_print.h
+++ b/include/drm/drm_print.h
@@ -162,7 +162,7 @@ struct drm_print_iterator {
* void makecoredump(...)
* {
* ...
- * dev_coredumpm(dev, THIS_MODULE, data, 0, GFP_KERNEL,
+ * dev_coredumpm(dev, THIS_MODULE, data, 0,
* coredump_read, ...)
* }
*
diff --git a/include/linux/devcoredump.h b/include/linux/devcoredump.h
index c008169ed2c..c7d840d824c 100644
--- a/include/linux/devcoredump.h
+++ b/include/linux/devcoredump.h
@@ -52,27 +52,26 @@ static inline void _devcd_free_sgtable(struct scatterlist *table)
#ifdef CONFIG_DEV_COREDUMP
-void dev_coredumpv(struct device *dev, void *data, size_t datalen,
- gfp_t gfp);
+void dev_coredumpv(struct device *dev, void *data, size_t datalen);
void dev_coredumpm(struct device *dev, struct module *owner,
- void *data, size_t datalen, gfp_t gfp,
+ void *data, size_t datalen,
ssize_t (*read)(char *buffer, loff_t offset, size_t count,
void *data, size_t datalen),
void (*free)(void *data));
void dev_coredumpsg(struct device *dev, struct scatterlist *table,
- size_t datalen, gfp_t gfp);
+ size_t datalen);
#else
static inline void dev_coredumpv(struct device *dev, void *data,
- size_t datalen, gfp_t gfp)
+ size_t datalen)
{
vfree(data);
}
static inline void
dev_coredumpm(struct device *dev, struct module *owner,
- void *data, size_t datalen, gfp_t gfp,
+ void *data, size_t datalen,
ssize_t (*read)(char *buffer, loff_t offset, size_t count,
void *data, size_t datalen),
void (*free)(void *data))
@@ -81,7 +80,7 @@ dev_coredumpm(struct device *dev, struct module *owner,
}
static inline void dev_coredumpsg(struct device *dev, struct scatterlist *table,
- size_t datalen, gfp_t gfp)
+ size_t datalen)
{
_devcd_free_sgtable(table);
}
diff --git a/sound/soc/intel/avs/apl.c b/sound/soc/intel/avs/apl.c
index b8e2b23c9f6..1ff57f1a483 100644
--- a/sound/soc/intel/avs/apl.c
+++ b/sound/soc/intel/avs/apl.c
@@ -164,7 +164,7 @@ static int apl_coredump(struct avs_dev *adev, union avs_notify_msg *msg)
} while (offset < msg->ext.coredump.stack_dump_size);
exit:
- dev_coredumpv(adev->dev, dump, dump_size, GFP_KERNEL);
+ dev_coredumpv(adev->dev, dump, dump_size);
return 0;
}
diff --git a/sound/soc/intel/avs/skl.c b/sound/soc/intel/avs/skl.c
index bda5ec7510f..3413162768d 100644
--- a/sound/soc/intel/avs/skl.c
+++ b/sound/soc/intel/avs/skl.c
@@ -88,7 +88,7 @@ static int skl_coredump(struct avs_dev *adev, union avs_notify_msg *msg)
return -ENOMEM;
memcpy_fromio(dump, avs_sram_addr(adev, AVS_FW_REGS_WINDOW), AVS_FW_REGS_SIZE);
- dev_coredumpv(adev->dev, dump, AVS_FW_REGS_SIZE, GFP_KERNEL);
+ dev_coredumpv(adev->dev, dump, AVS_FW_REGS_SIZE);
return 0;
}
diff --git a/sound/soc/intel/catpt/dsp.c b/sound/soc/intel/catpt/dsp.c
index 346bec00030..d2afe9ff1e3 100644
--- a/sound/soc/intel/catpt/dsp.c
+++ b/sound/soc/intel/catpt/dsp.c
@@ -539,7 +539,7 @@ int catpt_coredump(struct catpt_dev *cdev)
pos += CATPT_DMA_REGS_SIZE;
}
- dev_coredumpv(cdev->dev, dump, dump_size, GFP_KERNEL);
+ dev_coredumpv(cdev->dev, dump, dump_size);
return 0;
}
--
2.17.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH v5 2/2] mwifiex: fix sleep in atomic context bugs caused by dev_coredumpv
2022-06-03 5:09 [PATCH v5 0/2] Remove useless param of devcoredump functions and fix bugs Duoming Zhou
2022-06-03 5:09 ` [PATCH v5 1/2] devcoredump: remove the useless gfp_t parameter in dev_coredumpv and dev_coredumpm Duoming Zhou
@ 2022-06-03 5:09 ` Duoming Zhou
2022-06-06 18:14 ` Brian Norris
1 sibling, 1 reply; 6+ messages in thread
From: Duoming Zhou @ 2022-06-03 5:09 UTC (permalink / raw)
To: linux-wireless, linux-kernel
Cc: amitkarwar, ganapathi017, sharvari.harisangam, huxinming820,
kvalo, davem, edumazet, kuba, pabeni, netdev, johannes, gregkh,
rafael, Duoming Zhou
There are sleep in atomic context bugs when uploading device dump
data in mwifiex. The root cause is that dev_coredumpv could not
be used in atomic contexts, because it calls dev_set_name which
include operations that may sleep. The call tree shows execution
paths that could lead to bugs:
(Interrupt context)
fw_dump_timer_fn
mwifiex_upload_device_dump
dev_coredumpv(..., GFP_KERNEL)
dev_coredumpm()
kzalloc(sizeof(*devcd), gfp); //may sleep
dev_set_name
kobject_set_name_vargs
kvasprintf_const(GFP_KERNEL, ...); //may sleep
kstrdup(s, GFP_KERNEL); //may sleep
The corresponding fail log is shown below:
[ 135.275938] usb 1-1: == mwifiex dump information to /sys/class/devcoredump start
[ 135.281029] BUG: sleeping function called from invalid context at include/linux/sched/mm.h:265
...
[ 135.293613] Call Trace:
[ 135.293613] <IRQ>
[ 135.293613] dump_stack_lvl+0x57/0x7d
[ 135.293613] __might_resched.cold+0x138/0x173
[ 135.293613] ? dev_coredumpm+0xca/0x2e0
[ 135.293613] kmem_cache_alloc_trace+0x189/0x1f0
[ 135.293613] ? devcd_match_failing+0x30/0x30
[ 135.293613] dev_coredumpm+0xca/0x2e0
[ 135.293613] ? devcd_freev+0x10/0x10
[ 135.293613] dev_coredumpv+0x1c/0x20
[ 135.293613] ? devcd_match_failing+0x30/0x30
[ 135.293613] mwifiex_upload_device_dump+0x65/0xb0
[ 135.293613] ? mwifiex_dnld_fw+0x1b0/0x1b0
[ 135.293613] call_timer_fn+0x122/0x3d0
[ 135.293613] ? msleep_interruptible+0xb0/0xb0
[ 135.293613] ? lock_downgrade+0x3c0/0x3c0
[ 135.293613] ? __next_timer_interrupt+0x13c/0x160
[ 135.293613] ? lockdep_hardirqs_on_prepare+0xe/0x220
[ 135.293613] ? mwifiex_dnld_fw+0x1b0/0x1b0
[ 135.293613] __run_timers.part.0+0x3f8/0x540
[ 135.293613] ? call_timer_fn+0x3d0/0x3d0
[ 135.293613] ? arch_restore_msi_irqs+0x10/0x10
[ 135.293613] ? lapic_next_event+0x31/0x40
[ 135.293613] run_timer_softirq+0x4f/0xb0
[ 135.293613] __do_softirq+0x1c2/0x651
...
[ 135.293613] RIP: 0010:default_idle+0xb/0x10
[ 135.293613] RSP: 0018:ffff888006317e68 EFLAGS: 00000246
[ 135.293613] RAX: ffffffff82ad8d10 RBX: ffff888006301cc0 RCX: ffffffff82ac90e1
[ 135.293613] RDX: ffffed100d9ff1b4 RSI: ffffffff831ad140 RDI: ffffffff82ad8f20
[ 135.293613] RBP: 0000000000000003 R08: 0000000000000000 R09: ffff88806cff8d9b
[ 135.293613] R10: ffffed100d9ff1b3 R11: 0000000000000001 R12: ffffffff84593410
[ 135.293613] R13: 0000000000000000 R14: 0000000000000000 R15: 1ffff11000c62fd2
...
[ 135.389205] usb 1-1: == mwifiex dump information to /sys/class/devcoredump end
This patch uses delayed work to replace timer and moves the operations
that may sleep into a delayed work in order to mitigate bugs, it was
tested on Marvell 88W8801 chip whose port is usb and the firmware is
usb8801_uapsta.bin. The following is the result after using delayed
work to replace timer.
[ 134.936453] usb 1-1: == mwifiex dump information to /sys/class/devcoredump start
[ 135.043344] usb 1-1: == mwifiex dump information to /sys/class/devcoredump end
As we can see, there is no bug now.
Fixes: f5ecd02a8b20 ("mwifiex: device dump support for usb interface")
Signed-off-by: Duoming Zhou <duoming@zju.edu.cn>
---
Changes in v5:
- Use delayed work to replace timer.
drivers/net/wireless/marvell/mwifiex/init.c | 10 ++++++----
drivers/net/wireless/marvell/mwifiex/main.h | 2 +-
drivers/net/wireless/marvell/mwifiex/sta_event.c | 6 +++---
3 files changed, 10 insertions(+), 8 deletions(-)
diff --git a/drivers/net/wireless/marvell/mwifiex/init.c b/drivers/net/wireless/marvell/mwifiex/init.c
index 88c72d1827a..3713f3e323f 100644
--- a/drivers/net/wireless/marvell/mwifiex/init.c
+++ b/drivers/net/wireless/marvell/mwifiex/init.c
@@ -63,9 +63,11 @@ static void wakeup_timer_fn(struct timer_list *t)
adapter->if_ops.card_reset(adapter);
}
-static void fw_dump_timer_fn(struct timer_list *t)
+static void fw_dump_work(struct work_struct *work)
{
- struct mwifiex_adapter *adapter = from_timer(adapter, t, devdump_timer);
+ struct mwifiex_adapter *adapter = container_of(work,
+ struct mwifiex_adapter,
+ devdump_work.work);
mwifiex_upload_device_dump(adapter);
}
@@ -321,7 +323,7 @@ static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
adapter->active_scan_triggered = false;
timer_setup(&adapter->wakeup_timer, wakeup_timer_fn, 0);
adapter->devdump_len = 0;
- timer_setup(&adapter->devdump_timer, fw_dump_timer_fn, 0);
+ INIT_DELAYED_WORK(&adapter->devdump_work, fw_dump_work);
}
/*
@@ -400,7 +402,7 @@ static void
mwifiex_adapter_cleanup(struct mwifiex_adapter *adapter)
{
del_timer(&adapter->wakeup_timer);
- del_timer_sync(&adapter->devdump_timer);
+ cancel_delayed_work_sync(&adapter->devdump_work);
mwifiex_cancel_all_pending_cmd(adapter);
wake_up_interruptible(&adapter->cmd_wait_q.wait);
wake_up_interruptible(&adapter->hs_activate_wait_q);
diff --git a/drivers/net/wireless/marvell/mwifiex/main.h b/drivers/net/wireless/marvell/mwifiex/main.h
index 332dd1c8db3..6530c6ee308 100644
--- a/drivers/net/wireless/marvell/mwifiex/main.h
+++ b/drivers/net/wireless/marvell/mwifiex/main.h
@@ -1055,7 +1055,7 @@ struct mwifiex_adapter {
/* Device dump data/length */
void *devdump_data;
int devdump_len;
- struct timer_list devdump_timer;
+ struct delayed_work devdump_work;
bool ignore_btcoex_events;
};
diff --git a/drivers/net/wireless/marvell/mwifiex/sta_event.c b/drivers/net/wireless/marvell/mwifiex/sta_event.c
index 7d42c5d2dbf..4d93386494c 100644
--- a/drivers/net/wireless/marvell/mwifiex/sta_event.c
+++ b/drivers/net/wireless/marvell/mwifiex/sta_event.c
@@ -623,8 +623,8 @@ mwifiex_fw_dump_info_event(struct mwifiex_private *priv,
* transmission event get lost, in this cornel case,
* user would still get partial of the dump.
*/
- mod_timer(&adapter->devdump_timer,
- jiffies + msecs_to_jiffies(MWIFIEX_TIMER_10S));
+ schedule_delayed_work(&adapter->devdump_work,
+ msecs_to_jiffies(MWIFIEX_TIMER_10S));
}
/* Overflow check */
@@ -643,7 +643,7 @@ mwifiex_fw_dump_info_event(struct mwifiex_private *priv,
return;
upload_dump:
- del_timer_sync(&adapter->devdump_timer);
+ cancel_delayed_work_sync(&adapter->devdump_work);
mwifiex_upload_device_dump(adapter);
}
--
2.17.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH v5 2/2] mwifiex: fix sleep in atomic context bugs caused by dev_coredumpv
2022-06-03 5:09 ` [PATCH v5 2/2] mwifiex: fix sleep in atomic context bugs caused by dev_coredumpv Duoming Zhou
@ 2022-06-06 18:14 ` Brian Norris
2022-06-07 0:22 ` duoming
0 siblings, 1 reply; 6+ messages in thread
From: Brian Norris @ 2022-06-06 18:14 UTC (permalink / raw)
To: Duoming Zhou
Cc: linux-wireless, linux-kernel, amitkarwar, ganapathi017,
sharvari.harisangam, huxinming820, kvalo, davem, edumazet, kuba,
pabeni, netdev, johannes, gregkh, rafael
On Fri, Jun 03, 2022 at 01:09:35PM +0800, Duoming Zhou wrote:
> There are sleep in atomic context bugs when uploading device dump
> data in mwifiex. The root cause is that dev_coredumpv could not
> be used in atomic contexts, because it calls dev_set_name which
> include operations that may sleep. The call tree shows execution
> paths that could lead to bugs:
...
> Fixes: f5ecd02a8b20 ("mwifiex: device dump support for usb interface")
> Signed-off-by: Duoming Zhou <duoming@zju.edu.cn>
> ---
> Changes in v5:
> - Use delayed work to replace timer.
>
> drivers/net/wireless/marvell/mwifiex/init.c | 10 ++++++----
> drivers/net/wireless/marvell/mwifiex/main.h | 2 +-
> drivers/net/wireless/marvell/mwifiex/sta_event.c | 6 +++---
> 3 files changed, 10 insertions(+), 8 deletions(-)
Looks great! Thanks for working on this.
Reviewed-by: Brian Norris <briannorris@chromium.org>
Some small nitpicks below, but they're definitely not critical.
> diff --git a/drivers/net/wireless/marvell/mwifiex/init.c b/drivers/net/wireless/marvell/mwifiex/init.c
> index 88c72d1827a..3713f3e323f 100644
> --- a/drivers/net/wireless/marvell/mwifiex/init.c
> +++ b/drivers/net/wireless/marvell/mwifiex/init.c
> @@ -63,9 +63,11 @@ static void wakeup_timer_fn(struct timer_list *t)
> adapter->if_ops.card_reset(adapter);
> }
>
> -static void fw_dump_timer_fn(struct timer_list *t)
> +static void fw_dump_work(struct work_struct *work)
> {
> - struct mwifiex_adapter *adapter = from_timer(adapter, t, devdump_timer);
> + struct mwifiex_adapter *adapter = container_of(work,
> + struct mwifiex_adapter,
> + devdump_work.work);
Super nitpicky: the hanging indent style seems a bit off. I typically
see people try to align to the first character after the parenthesis,
like:
struct mwifiex_adapter *adapter = container_of(work,
struct mwifiex_adapter,
devdump_work.work);
It's not a clearly-specified style rule I think, so I definitely
wouldn't insist.
On the bright side: I think the clang-format rules (in .clang-format)
are getting better, so one can make some formatting decisions via tools
instead of opinion and close reading! Unfortunately, we probably can't
do that extensively and automatically, because I doubt people will love
all the reformatting because of all the existing inconsistent style.
Anyway, to cut to the chase: clang-format chooses moving to a new line:
struct mwifiex_adapter *adapter =
container_of(work, struct mwifiex_adapter, devdump_work.work);
More info if you're interested:
https://www.kernel.org/doc/html/latest/process/clang-format.html
>
> mwifiex_upload_device_dump(adapter);
> }
...
> diff --git a/drivers/net/wireless/marvell/mwifiex/main.h b/drivers/net/wireless/marvell/mwifiex/main.h
> index 332dd1c8db3..6530c6ee308 100644
> --- a/drivers/net/wireless/marvell/mwifiex/main.h
> +++ b/drivers/net/wireless/marvell/mwifiex/main.h
> @@ -1055,7 +1055,7 @@ struct mwifiex_adapter {
Nitpick: main.h is probably missing a lot of #includes, but you could
probably add <linux/workqueue.h> while you're at it.
Brian
> /* Device dump data/length */
> void *devdump_data;
> int devdump_len;
> - struct timer_list devdump_timer;
> + struct delayed_work devdump_work;
>
> bool ignore_btcoex_events;
> };
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v5 1/2] devcoredump: remove the useless gfp_t parameter in dev_coredumpv and dev_coredumpm
2022-06-03 5:09 ` [PATCH v5 1/2] devcoredump: remove the useless gfp_t parameter in dev_coredumpv and dev_coredumpm Duoming Zhou
@ 2022-06-06 18:17 ` Brian Norris
0 siblings, 0 replies; 6+ messages in thread
From: Brian Norris @ 2022-06-06 18:17 UTC (permalink / raw)
To: Duoming Zhou
Cc: linux-wireless, linux-kernel, amitkarwar, ganapathi017,
sharvari.harisangam, huxinming820, kvalo, davem, edumazet, kuba,
pabeni, netdev, johannes, gregkh, rafael
On Fri, Jun 03, 2022 at 01:09:34PM +0800, Duoming Zhou wrote:
> The dev_coredumpv() and dev_coredumpm() could not be used in atomic
> context, because they call kvasprintf_const() and kstrdup() with
> GFP_KERNEL parameter. The process is shown below:
>
> dev_coredumpv(.., gfp_t gfp)
> dev_coredumpm(.., gfp_t gfp)
> dev_set_name
> kobject_set_name_vargs
> kvasprintf_const(GFP_KERNEL, ...); //may sleep
> kstrdup(s, GFP_KERNEL); //may sleep
>
> This patch removes gfp_t parameter of dev_coredumpv() and dev_coredumpm()
> and changes the gfp_t parameter of kzalloc() in dev_coredumpm() to
> GFP_KERNEL in order to show they could not be used in atomic context.
>
> Fixes: 833c95456a70 ("device coredump: add new device coredump class")
> Signed-off-by: Duoming Zhou <duoming@zju.edu.cn>
For whatever it's worth:
Reviewed-by: Brian Norris <briannorris@chromium.org>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v5 2/2] mwifiex: fix sleep in atomic context bugs caused by dev_coredumpv
2022-06-06 18:14 ` Brian Norris
@ 2022-06-07 0:22 ` duoming
0 siblings, 0 replies; 6+ messages in thread
From: duoming @ 2022-06-07 0:22 UTC (permalink / raw)
To: Brian Norris
Cc: linux-wireless, linux-kernel, amitkarwar, ganapathi017,
sharvari.harisangam, huxinming820, kvalo, davem, edumazet, kuba,
pabeni, netdev, johannes, gregkh, rafael
Hello,
On Mon, 6 Jun 2022 11:14:05 -0700 Brian wrote:
> On Fri, Jun 03, 2022 at 01:09:35PM +0800, Duoming Zhou wrote:
> > There are sleep in atomic context bugs when uploading device dump
> > data in mwifiex. The root cause is that dev_coredumpv could not
> > be used in atomic contexts, because it calls dev_set_name which
> > include operations that may sleep. The call tree shows execution
> > paths that could lead to bugs:
> ...
> > Fixes: f5ecd02a8b20 ("mwifiex: device dump support for usb interface")
> > Signed-off-by: Duoming Zhou <duoming@zju.edu.cn>
> > ---
> > Changes in v5:
> > - Use delayed work to replace timer.
> >
> > drivers/net/wireless/marvell/mwifiex/init.c | 10 ++++++----
> > drivers/net/wireless/marvell/mwifiex/main.h | 2 +-
> > drivers/net/wireless/marvell/mwifiex/sta_event.c | 6 +++---
> > 3 files changed, 10 insertions(+), 8 deletions(-)
>
> Looks great! Thanks for working on this.
>
> Reviewed-by: Brian Norris <briannorris@chromium.org>
>
> Some small nitpicks below, but they're definitely not critical.
Thank you for your time and approval!
> > diff --git a/drivers/net/wireless/marvell/mwifiex/init.c b/drivers/net/wireless/marvell/mwifiex/init.c
> > index 88c72d1827a..3713f3e323f 100644
> > --- a/drivers/net/wireless/marvell/mwifiex/init.c
> > +++ b/drivers/net/wireless/marvell/mwifiex/init.c
> > @@ -63,9 +63,11 @@ static void wakeup_timer_fn(struct timer_list *t)
> > adapter->if_ops.card_reset(adapter);
> > }
> >
> > -static void fw_dump_timer_fn(struct timer_list *t)
> > +static void fw_dump_work(struct work_struct *work)
> > {
> > - struct mwifiex_adapter *adapter = from_timer(adapter, t, devdump_timer);
> > + struct mwifiex_adapter *adapter = container_of(work,
> > + struct mwifiex_adapter,
> > + devdump_work.work);
>
> Super nitpicky: the hanging indent style seems a bit off. I typically
> see people try to align to the first character after the parenthesis,
> like:
>
> struct mwifiex_adapter *adapter = container_of(work,
> struct mwifiex_adapter,
> devdump_work.work);
>
> It's not a clearly-specified style rule I think, so I definitely
> wouldn't insist.
>
> On the bright side: I think the clang-format rules (in .clang-format)
> are getting better, so one can make some formatting decisions via tools
> instead of opinion and close reading! Unfortunately, we probably can't
> do that extensively and automatically, because I doubt people will love
> all the reformatting because of all the existing inconsistent style.
>
> Anyway, to cut to the chase: clang-format chooses moving to a new line:
>
> struct mwifiex_adapter *adapter =
> container_of(work, struct mwifiex_adapter, devdump_work.work);
>
> More info if you're interested:
> https://www.kernel.org/doc/html/latest/process/clang-format.html
>
> >
> > mwifiex_upload_device_dump(adapter);
> > }
Thanks for your suggestions! I will use clang-format to adjust the format.
> > diff --git a/drivers/net/wireless/marvell/mwifiex/main.h b/drivers/net/wireless/marvell/mwifiex/main.h
> > index 332dd1c8db3..6530c6ee308 100644
> > --- a/drivers/net/wireless/marvell/mwifiex/main.h
> > +++ b/drivers/net/wireless/marvell/mwifiex/main.h
> > @@ -1055,7 +1055,7 @@ struct mwifiex_adapter {
>
> Nitpick: main.h is probably missing a lot of #includes, but you could
> probably add <linux/workqueue.h> while you're at it.
I will add <linux/workqueue.h> in main.h.
>
> > /* Device dump data/length */
> > void *devdump_data;
> > int devdump_len;
> > - struct timer_list devdump_timer;
> > + struct delayed_work devdump_work;
> >
> > bool ignore_btcoex_events;
> > };
Best regards,
Duoming Zhou
^ permalink raw reply [flat|nested] 6+ messages in thread
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2022-06-03 5:09 [PATCH v5 0/2] Remove useless param of devcoredump functions and fix bugs Duoming Zhou
2022-06-03 5:09 ` [PATCH v5 1/2] devcoredump: remove the useless gfp_t parameter in dev_coredumpv and dev_coredumpm Duoming Zhou
2022-06-06 18:17 ` Brian Norris
2022-06-03 5:09 ` [PATCH v5 2/2] mwifiex: fix sleep in atomic context bugs caused by dev_coredumpv Duoming Zhou
2022-06-06 18:14 ` Brian Norris
2022-06-07 0:22 ` duoming
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