samsung-sm8650/android_kernel_samsung_sm8650-modules
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disp: msm: sde: add null pointer check for encoder current master

Selaa lähdekoodia 
During virt enable call, sde_enc master will be removed and
re-assigned. If an underrun is observed during this
scenario, it results in crash due to uninitialized access.
This change handles the above scenario.

Change-Id: Iec9e4a0bc4b763e44933334dacf82f1439eacc17
Signed-off-by: Yashwanth <yvulapu@codeaurora.org>
This commit is contained in:
Yashwanth
2020-09-03 16:38:22 +05:30
vanhempi 8510269a39
commit 35b948550d
1 muutettua tiedostoa jossa 2 lisäystä ja 1 poistoa
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msm/sde/sde_encoder.c
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@@ -3021,7 +3021,8 @@ static void sde_encoder_underrun_callback(struct drm_encoder *drm_enc,
SDE_ATRACE_BEGIN("encoder_underrun_callback");
atomic_inc(&phy_enc->underrun_cnt);
SDE_EVT32(DRMID(drm_enc), atomic_read(&phy_enc->underrun_cnt));
if (sde_enc->cur_master->ops.get_underrun_line_count)
if (sde_enc->cur_master &&
sde_enc->cur_master->ops.get_underrun_line_count)
sde_enc->cur_master->ops.get_underrun_line_count(
sde_enc->cur_master);