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| author | Kaustabh Chakraborty <[email protected]> | 2025-06-26 19:20:30 +0000 |
|---|---|---|
| committer | Inki Dae <[email protected]> | 2025-06-29 07:58:16 +0000 |
| commit | b846350aa272de99bf6fecfa6b08e64ebfb13173 (patch) | |
| tree | 19641e42545f790c48c3f557afbf6e1adb52b09f /drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c | |
| parent | drm/exynos: Don't use %pK through printk (diff) | |
| download | kernel-b846350aa272de99bf6fecfa6b08e64ebfb13173.tar.gz kernel-b846350aa272de99bf6fecfa6b08e64ebfb13173.zip | |
drm/exynos: exynos7_drm_decon: add vblank check in IRQ handling
If there's support for another console device (such as a TTY serial),
the kernel occasionally panics during boot. The panic message and a
relevant snippet of the call stack is as follows:
Unable to handle kernel NULL pointer dereference at virtual address 000000000000000
Call trace:
drm_crtc_handle_vblank+0x10/0x30 (P)
decon_irq_handler+0x88/0xb4
[...]
Otherwise, the panics don't happen. This indicates that it's some sort
of race condition.
Add a check to validate if the drm device can handle vblanks before
calling drm_crtc_handle_vblank() to avoid this.
Cc: [email protected]
Fixes: 96976c3d9aff ("drm/exynos: Add DECON driver")
Signed-off-by: Kaustabh Chakraborty <[email protected]>
Signed-off-by: Inki Dae <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c')
0 files changed, 0 insertions, 0 deletions