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scsi: ufs: core: Validate connected lane counts

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The connected lane count is used by TX equalization code to index arrays
sized by UFS_MAX_LANES. Reject zero and out-of-range RX or TX lane counts
before they can be propagated.

Fixes: 03e5d38e2f ("scsi: ufs: core: Add support for TX Equalization")
Signed-off-by: Li Qiang <liqiang01@kylinos.cn>
Link: https://patch.msgid.link/20260717153914.26321-4-liqiang01@kylinos.cn
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Li Qiang 2026-07-17 23:39:10 +08:00 committed by Martin K. Petersen
parent 331bda797e
commit 9e6dd452f1
1 changed files with 3 additions and 1 deletions
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4
drivers/ufs/core/ufshcd.c
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@ -4729,7 +4729,9 @@ static int ufshcd_get_max_pwr_mode(struct ufs_hba *hba)
ufshcd_dme_get(hba, UIC_ARG_MIB(PA_CONNECTEDTXDATALANES),
&pwr_info->lane_tx);
if (!pwr_info->lane_rx || !pwr_info->lane_tx) {
if (!pwr_info->lane_rx || !pwr_info->lane_tx ||
pwr_info->lane_rx > UFS_MAX_LANES ||
pwr_info->lane_tx > UFS_MAX_LANES) {
dev_err(hba->dev, "%s: invalid connected lanes value. rx=%d, tx=%d\n",
__func__,
pwr_info->lane_rx,