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gpu: nvgpu: sysfs adding NULL pointer check

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golden image size will be set when memory allocated.
See function:
- nvgpu_gr_obj_ctx_init

If golden image size is 0, gr_golden_image should be a NULL
pointer in most cases. So add NULL pointer checking in
tpc_pg_mask_store to avoid NULL pointer exception.

Bug 2403210

Change-Id: I14df5cd94d7a4418c3089c5f84b6eab93c485ba6
Signed-off-by: Sunny Li <sunnyl@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2161280
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Debarshi Dutta <ddutta@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Sunny Li
2019-07-25 20:59:43 +08:00
committed by Alex Waterman
parent 1d5698cf6a
commit 516023e1e4
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/nvgpu/os/linux/sysfs.c
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@@ -853,7 +853,9 @@ static ssize_t tpc_pg_mask_store(struct device *dev,
goto exit; goto exit;
} }
if (nvgpu_gr_obj_ctx_get_golden_image_size(gr_golden_image) != 0) { if (gr_golden_image &&
nvgpu_gr_obj_ctx_get_golden_image_size(gr_golden_image)
!= 0) {
nvgpu_err(g, "golden image size already initialized"); nvgpu_err(g, "golden image size already initialized");
nvgpu_mutex_release(&g->tpc_pg_lock); nvgpu_mutex_release(&g->tpc_pg_lock);
return -ENODEV; return -ENODEV;