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scsi: ufs: qcom: Add sanity checks for gear/lane values during ICC scaling

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Let's add the checks to warn the user if the ICC scaling is not supported
for the gear/lane values and also fallback to the max value if that's the
case.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20240403-ufs-icc-fix-v2-2-958412a5eb45@linaro.org
Reviewed-by: Andrew Halaney <ahalaney@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Manivannan Sadhasivam
2024-04-03 18:50:04 +05:30
committed by Martin K. Petersen
parent 83ef2ab4bd
commit 33507b3964
1 changed files with 10 additions and 0 deletions
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drivers/ufs/host/ufs-qcom.c
+10
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@@ -687,6 +687,16 @@ static struct __ufs_qcom_bw_table ufs_qcom_get_bw_table(struct ufs_qcom_host *ho
int gear = max_t(u32, p->gear_rx, p->gear_tx);
int lane = max_t(u32, p->lane_rx, p->lane_tx);
if (WARN_ONCE(gear > QCOM_UFS_MAX_GEAR,
"ICC scaling for UFS Gear (%d) not supported. Using Gear (%d) bandwidth\n",
gear, QCOM_UFS_MAX_GEAR))
gear = QCOM_UFS_MAX_GEAR;
if (WARN_ONCE(lane > QCOM_UFS_MAX_LANE,
"ICC scaling for UFS Lane (%d) not supported. Using Lane (%d) bandwidth\n",
lane, QCOM_UFS_MAX_LANE))
lane = QCOM_UFS_MAX_LANE;
if (ufshcd_is_hs_mode(p)) {
if (p->hs_rate == PA_HS_MODE_B)
return ufs_qcom_bw_table[MODE_HS_RB][gear][lane];