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msm: ipa3: Fix null pointer dereference error

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If smmu is not enabled, smmu context device check
was missing before accessing it which was resulting
in null pointer dereference. Now adding check
before accessing it.

Change-Id: I94393524c79847a165ba605d34906525640b359a
Signed-off-by: Cheng Zeng <chenzeng@codeaurora.org>
This commit is contained in:
Cheng Zeng 2021-09-07 18:15:39 +08:00
commit 9e52c6925f
1 changed files with 1 additions and 1 deletions
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2
drivers/platform/msm/ipa/ipa_v3/ipa_nat.c
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@ -179,7 +179,7 @@ static int ipa3_nat_ipv6ct_mmap(
/*
* Check if no smmu or non dma coherent
*/
if (!cb->valid || !dev_is_dma_coherent(cb->dev)) {
if (cb && cb->dev && (!cb->valid || !dev_is_dma_coherent(cb->dev))) {
IPADBG("Either smmu valid=%u and/or DMA coherent=%u false\n",
cb->valid, !dev_is_dma_coherent(cb->dev));