6.6-stable review patch. If anyone has any objections, please let me know.
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From: Alice Chao alice.chao@mediatek.com
[ 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 --- drivers/ufs/host/ufs-mediatek.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c index 90a698f8a082e..7ede6531bf40c 100644 --- a/drivers/ufs/host/ufs-mediatek.c +++ b/drivers/ufs/host/ufs-mediatek.c @@ -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