This series is intended for 4.17 adding support for sysfs initiated
coredump. This uses new functionality that was added in drivers base.
Device drivers can now implement a .coredump() callback upon which a
sysfs entry is created when the device is bound to the driver. From
user-space a device coredump can be initiated. The easiest way is by
going the drivers entry and enter into the bound device folder like
this:
# cd /sys/bus/pci/drivers/brcmfmac/0000:02:00.0
# echo 1 > coredump
# ls /sys/class/devcoredump/
devcd1 disabled
# ls -l /sys/class/devcoredump/devcd1/
total 0
-rw------- 1 root root 0 Feb 19 23:49 data
lrwxrwxrwx 1 root root 0 Feb 19 23:49 failing_device ->
../../../pci0000:00/0000:00:1c.0/0000:02:00.0
drwxr-xr-x 2 root root 0 Feb 19 23:49 power
lrwxrwxrwx 1 root root 0 Feb 19 23:49 subsystem ->
../../../../class/devcoredump
-rw-r--r-- 1 root root 4096 Feb 19 23:49 uevent
The device driver can implement the .coredump() callback as they like.
The use of the dev_coredump api is not enforced although the sysfs entry
is only created when CONFIG_DEV_COREDUMP is selected.
Apart from brcmfmac, the other drivers used dev_coredump api and had a
mechanism in place through debugfs, which is removed in these patches.
With these patches initiating the coredump can be done without selecting
CONFIG_DEBUGFS. No attempt was made to look for drivers providing some sore
of coredump functionality by other means than the dev_coredump api.
The first 2 patches apply to the master branch of the wireless-drivers-next
repository. The last patch applies to the master branch of the bluetooth-next.
Arend van Spriel (3):
brcmfmac: add support for sysfs initiated coredump
mwifiex: support sysfs initiated device coredump
btmrvl: support sysfs initiated firmware coredump
drivers/bluetooth/btmrvl_debugfs.c | 31 ----------------------
drivers/bluetooth/btmrvl_drv.h | 2 --
drivers/bluetooth/btmrvl_main.c | 6 -----
drivers/bluetooth/btmrvl_sdio.c | 18 ++++++++-----
.../wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c | 1 +
.../net/wireless/broadcom/brcm80211/brcmfmac/bus.h | 2 ++
.../wireless/broadcom/brcm80211/brcmfmac/core.c | 7 +++++
.../wireless/broadcom/brcm80211/brcmfmac/pcie.c | 1 +
drivers/net/wireless/marvell/mwifiex/debugfs.c | 31 +---------------------
drivers/net/wireless/marvell/mwifiex/pcie.c | 19 +++++++++++--
drivers/net/wireless/marvell/mwifiex/sdio.c | 13 +++++++++
drivers/net/wireless/marvell/mwifiex/usb.c | 14 ++++++++++
12 files changed, 68 insertions(+), 77 deletions(-)
--
1.9.1
