Because interrupts are generated artifitially, kernel bug may lead to
infinte attempts to submit CRC.
Signed-off-by: Oleg Vasilev <oleg.vasi...@intel.com>
---
drivers/gpu/drm/vkms/vkms_crc.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/vkms/vkms_crc.c b/drivers/gpu/drm/vkms/vkms_crc.c
index d7b409a3c0f8..bc717a8888b5 100644
--- a/drivers/gpu/drm/vkms/vkms_crc.c
+++ b/drivers/gpu/drm/vkms/vkms_crc.c
@@ -167,6 +167,7 @@ void vkms_crc_work_handle(struct work_struct *work)
u32 crc32 = 0;
u64 frame_start, frame_end;
unsigned long flags;
+ int ret;
spin_lock_irqsave(&out->state_lock, flags);
frame_start = crtc_state->frame_start;
@@ -202,7 +203,14 @@ void vkms_crc_work_handle(struct work_struct *work)
* missing frames
*/
while (frame_start <= frame_end)
- drm_crtc_add_crc_entry(crtc, true, frame_start++, &crc32);
+ {
+ ret = drm_crtc_add_crc_entry(crtc, true, frame_start++, &crc32);
+ if (ret) {
+ DRM_WARN("VKMS stop generating CRCs\n");
+ out->crc_enabled = false;
+ break;
+ }
+ }
out:
/* to avoid using the same value for frame number again */
--
2.21.0
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