Hi, This issue[1] is already fixed on latest linux.git You can check it. Thanks. [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b53b0128052ffd687797d5f4deeb76327e7b5711 Regards, Chanwoo Choi On 19. 5. 24. 오전 6:58, Rob Clark wrote: > From: Rob Clark <robdclark@xxxxxxxxxxxx> > > The two spots it is called expect either an IS_ERR() or a valid pointer, > but not NULL. > > Fixes this crash that I came across: > > Unable to handle kernel NULL pointer dereference at virtual address 0000000000000030 > Mem abort info: > ESR = 0x96000005 > Exception class = DABT (current EL), IL = 32 bits > SET = 0, FnV = 0 > EA = 0, S1PTW = 0 > Data abort info: > ISV = 0, ISS = 0x00000005 > CM = 0, WnR = 0 > [0000000000000030] user address but active_mm is swapper > Internal error: Oops: 96000005 [#1] PREEMPT SMP > Modules linked in: > Process kworker/2:1 (pid: 212, stack limit = 0x(____ptrval____)) > CPU: 2 PID: 212 Comm: kworker/2:1 Not tainted 5.1.0-43338-g460e6984675c-dirty #54 > Hardware name: Google Cheza (rev3+) (DT) > Workqueue: events deferred_probe_work_func > pstate: 00c00009 (nzcv daif +PAN +UAO) > pc : devfreq_add_device+0x2e4/0x410 > lr : devfreq_add_device+0x2d4/0x410 > sp : ffffff8013d93740 > x29: ffffff8013d93790 x28: ffffffc0f54f8670 > x27: 0000000000000001 x26: 0000000000000007 > x25: ffffff80124abfd8 x24: 0000000000000000 > x23: ffffffc0fabc4048 x22: ffffffc0fabc4388 > x21: ffffffc0fabc4010 x20: ffffffc0fa243010 > x19: ffffffc0fabc4000 x18: 0000000091c3d373 > x17: 0000000000000400 x16: 000000000000001a > x15: 000000019e06d400 x14: 0000000000000001 > x13: 0000000000000000 x12: 00000000000006b6 > x11: 0000000000000000 x10: 0000000000000000 > x9 : ffffffc0fa18ba00 x8 : 0000000000000000 > x7 : 0000000000000000 x6 : ffffff80127a3d9a > x5 : ffffff8013d93550 x4 : 0000000000000000 > x3 : 0000000000000000 x2 : 0000000000000000 > x1 : 00000000000000fe x0 : 0000000000000000 > Call trace: > devfreq_add_device+0x2e4/0x410 > devm_devfreq_add_device+0x64/0xac > msm_gpu_init+0x320/0x5c0 > adreno_gpu_init+0x21c/0x274 > a6xx_gpu_init+0x68/0xf4 > adreno_bind+0x158/0x284 > component_bind_all+0x110/0x204 > msm_drm_bind+0x118/0x5b8 > try_to_bring_up_master+0x15c/0x19c > component_master_add_with_match+0xb4/0xec > msm_pdev_probe+0x1f0/0x27c > platform_drv_probe+0x90/0xb0 > really_probe+0x120/0x298 > driver_probe_device+0x64/0xfc > __device_attach_driver+0x8c/0xa4 > bus_for_each_drv+0x88/0xd0 > __device_attach+0xac/0x134 > device_initial_probe+0x20/0x2c > bus_probe_device+0x34/0x90 > deferred_probe_work_func+0x74/0xac > process_one_work+0x210/0x428 > worker_thread+0x278/0x3e4 > kthread+0x120/0x130 > ret_from_fork+0x10/0x18 > Code: aa0003f8 b13ffc1f 54000762 f901c278 (f9401b08) > ---[ end trace a6ecc18ce5894375 ]--- > Kernel panic - not syncing: Fatal exception > > Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx> > --- > drivers/devfreq/devfreq.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c > index 0ae3de76833b..d29f66f0e52a 100644 > --- a/drivers/devfreq/devfreq.c > +++ b/drivers/devfreq/devfreq.c > @@ -254,7 +254,7 @@ static struct devfreq_governor *try_then_request_governor(const char *name) > /* Restore previous state before return */ > mutex_lock(&devfreq_list_lock); > if (err) > - return NULL; > + return ERR_PTR(err); > > governor = find_devfreq_governor(name); > } > -- Best Regards, Chanwoo Choi Samsung Electronics
