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camera: channel: Make sure csi channels are initailized before access

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There is case where CSI channels are initialized later before
accessing it. In this case, it can cause NULL pointer access.

Add checks before accessing it in the function
tegra_channel_find_linked_csi_subdev().

Bug 4346767

Change-Id: I752898af4b2164540cbd2e071ee36af4cd5f6fde
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3039709
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Laxman Dewangan
2023-12-22 18:04:31 +00:00
committed by mobile promotions
parent b2dcbdbc93
commit 1729ced2bf
1 changed files with 3 additions and 0 deletions
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3
drivers/media/platform/tegra/camera/vi/channel.c
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@@ -2007,6 +2007,9 @@ struct v4l2_subdev *tegra_channel_find_linked_csi_subdev(
struct tegra_csi_channel *csi_it;
int i = 0;
if (!csi)
return NULL;
list_for_each_entry(csi_it, &csi->csi_chans, list) {
for (i = 0; i < chan->num_subdevs; i++)
if (chan->subdev[i] == &csi_it->subdev)