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Message-ID: <6a270950.2c659.180f1a46e8c.Coremail.duoming@zju.edu.cn>
Date: Mon, 23 May 2022 23:58:46 +0800 (GMT+08:00)
From: duoming@....edu.cn
To: "Eric W. Biederman" <ebiederm@...ssion.com>
Cc: linux-wireless@...r.kernel.org, amitkarwar@...il.com,
ganapathi017@...il.com, sharvari.harisangam@....com,
huxinming820@...il.com, kvalo@...nel.org, davem@...emloft.net,
edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
gregkh@...uxfoundation.org, rafael@...nel.org
Subject: Re: [PATCH v3] mwifiex: fix sleep in atomic context bugs caused by
dev_coredumpv
Hello maintainers,
Thank you for your time and suggestions!
> > 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
> >
> > In order to let dev_coredumpv support atomic contexts, this patch
> > changes the gfp_t parameter of kvasprintf_const and kstrdup in
> > kobject_set_name_vargs from GFP_KERNEL to GFP_ATOMIC. What's more,
> > In order to mitigate bug, this patch changes the gfp_t parameter
> > of dev_coredumpv from GFP_KERNEL to GFP_ATOMIC.
>
> vmalloc in atomic context?
>
> Not only does dev_coredumpm set a device name dev_coredumpm creates an
> entire device to hold the device dump.
>
> My sense is that either dev_coredumpm needs to be rebuilt on a
> completely different principle that does not need a device to hold the
> coredump (so that it can be called from interrupt context) or that
> dev_coredumpm should never be called in an context that can not sleep.
The following solution removes the gfp_t parameter of dev_coredumpv(),
dev_coredumpm() and dev_coredumpsg() and change the gfp_t parameter of
kzalloc() in dev_coredumpm() to GFP_KERNEL, in order to show that these
functions can not be used in atomic context.
What's more, I move the operations that may sleep into a work item and use
schedule_work() to call a kernel thread to do the operations that may sleep.
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/@...e 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 f6e91fb432a..fe9229c3216 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..a8b93664276 100644
--- a/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c
+++ b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c
@@ -74,7 +74,7 @@ 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,
+ dev_coredumpm(disp_state->dev, THIS_MODULE, disp_state, 0,
disp_devcoredump_read, msm_disp_state_free);
}
diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c
index faf0c242874..c93dbd3840f 100644
--- a/drivers/gpu/drm/msm/msm_gpu.c
+++ b/drivers/gpu/drm/msm/msm_gpu.c
@@ -317,7 +317,7 @@ 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,
+ dev_coredumpm(gpu->dev->dev, THIS_MODULE, gpu, 0,
msm_gpu_devcoredump_read, msm_gpu_devcoredump_free);
}
#else
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/init.c b/drivers/net/wireless/marvell/mwifiex/init.c
index 88c72d1827a..cc3f1121eb9 100644
--- a/drivers/net/wireless/marvell/mwifiex/init.c
+++ b/drivers/net/wireless/marvell/mwifiex/init.c
@@ -63,11 +63,19 @@ static void wakeup_timer_fn(struct timer_list *t)
adapter->if_ops.card_reset(adapter);
}
+static void fw_dump_work(struct work_struct *work)
+{
+ struct mwifiex_adapter *adapter =
+ container_of(work, struct mwifiex_adapter, devdump_work);
+
+ mwifiex_upload_device_dump(adapter);
+}
+
static void fw_dump_timer_fn(struct timer_list *t)
{
struct mwifiex_adapter *adapter = from_timer(adapter, t, devdump_timer);
- mwifiex_upload_device_dump(adapter);
+ schedule_work(&adapter->devdump_work);
}
/*
@@ -321,6 +329,7 @@ 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;
+ INIT_WORK(&adapter->devdump_work, fw_dump_work);
timer_setup(&adapter->devdump_timer, fw_dump_timer_fn, 0);
}
@@ -401,6 +410,7 @@ mwifiex_adapter_cleanup(struct mwifiex_adapter *adapter)
{
del_timer(&adapter->wakeup_timer);
del_timer_sync(&adapter->devdump_timer);
+ cancel_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.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/marvell/mwifiex/main.h b/drivers/net/wireless/marvell/mwifiex/main.h
index 332dd1c8db3..c8ac2f57f18 100644
--- a/drivers/net/wireless/marvell/mwifiex/main.h
+++ b/drivers/net/wireless/marvell/mwifiex/main.h
@@ -900,6 +900,7 @@ struct mwifiex_adapter {
struct work_struct rx_work;
struct workqueue_struct *dfs_workqueue;
struct work_struct dfs_work;
+ struct work_struct devdump_work;
bool rx_work_enabled;
bool rx_processing;
bool delay_main_work;
diff --git a/drivers/net/wireless/marvell/mwifiex/sta_event.c b/drivers/net/wireless/marvell/mwifiex/sta_event.c
index 7d42c5d2dbf..8e28d0107d7 100644
--- a/drivers/net/wireless/marvell/mwifiex/sta_event.c
+++ b/drivers/net/wireless/marvell/mwifiex/sta_event.c
@@ -644,6 +644,7 @@ mwifiex_fw_dump_info_event(struct mwifiex_private *priv,
upload_dump:
del_timer_sync(&adapter->devdump_timer);
+ cancel_work_sync(&adapter->devdump_work);
mwifiex_upload_device_dump(adapter);
}
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 233998ca485..fec51e460bf 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
@@ -1619,8 +1619,7 @@ 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 8b9899e41b0..2fec240070b 100644
--- a/drivers/net/wireless/realtek/rtw88/main.c
+++ b/drivers/net/wireless/realtek/rtw88/main.c
@@ -413,7 +413,7 @@ 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/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/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;
}
Do you think this solution is ok? I will try to test it and I'd appreciate you
if you test and give feedback.
Best regards,
Duoming Zhou
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