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scsi: ufs: host: mediatek: Fix invalid access in vccqx handling

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[ Upstream commit 5863638598f5e4f64d2f85b03f376383ca1f2ab7 ]

Add a NULL check before accessing the 'vccqx' pointer to prevent invalid
memory access. This ensures that the function safely handles cases where
'vccq' and 'vccq2' are not initialized, improving the robustness of the
power management code.

Signed-off-by: Alice Chao <alice.chao@mediatek.com>
Reviewed-by: Peter Wang <peter.wang@mediatek.com>
Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Link: https://lore.kernel.org/r/20250811131423.3444014-11-peter.wang@mediatek.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Alice Chao
2025-08-11 21:11:26 +08:00
committed by Greg Kroah-Hartman
parent 2d5551640d
commit b34fc4fe9a
1 changed files with 3 additions and 0 deletions
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3
drivers/ufs/host/ufs-mediatek.c
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@@ -1316,6 +1316,9 @@ static void ufs_mtk_vccqx_set_lpm(struct ufs_hba *hba, bool lpm)
{
struct ufs_vreg *vccqx = NULL;
if (!hba->vreg_info.vccq && !hba->vreg_info.vccq2)
return;
if (hba->vreg_info.vccq)
vccqx = hba->vreg_info.vccq;
else