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b17c1bba9c
When tearingdown timesync, and not in arche platform, the state platform
callback is not initialized. That will trigger the following NULL
dereferencing.
CallTrace:
? gb_timesync_platform_unlock_bus+0x11/0x20 [greybus]
gb_timesync_teardown+0x85/0xc0 [greybus]
gb_timesync_svc_remove+0xab/0x190 [greybus]
gb_svc_del+0x29/0x110 [greybus]
gb_hd_del+0x14/0x20 [greybus]
ap_disconnect+0x24/0x60 [gb_es2]
usb_unbind_interface+0x7a/0x2c0
__device_release_driver+0x96/0x150
device_release_driver+0x1e/0x30
bus_remove_device+0xe7/0x130
device_del+0x116/0x230
usb_disable_device+0x97/0x1f0
usb_disconnect+0x80/0x260
hub_event+0x5ca/0x10e0
process_one_work+0x126/0x3b0
worker_thread+0x55/0x4c0
? process_one_work+0x3b0/0x3b0
kthread+0xc4/0xe0
? kthread_park+0xb0/0xb0
ret_from_fork+0x22/0x30
So, fix that by adding checks before use the callback.
Fixes:
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.. | ||
android | ||
board | ||
clocking-wizard | ||
comedi | ||
dgnc | ||
emxx_udc | ||
fbtft | ||
fsl-mc | ||
fwserial | ||
gdm724x | ||
goldfish | ||
greybus | ||
gs_fpgaboot | ||
i4l | ||
iio | ||
ks7010 | ||
lustre | ||
media | ||
most | ||
mt29f_spinand | ||
netlogic | ||
nvec | ||
octeon | ||
octeon-usb | ||
olpc_dcon | ||
rtl8188eu | ||
rtl8192e | ||
rtl8192u | ||
rtl8712 | ||
rts5208 | ||
skein | ||
sm750fb | ||
speakup | ||
unisys | ||
vc04_services | ||
vme | ||
vt6655 | ||
vt6656 | ||
wilc1000 | ||
wlan-ng | ||
xgifb | ||
Kconfig | ||
Makefile |