[PATCH v7 1/7] scsi: ufs: fix uninitialized tx_lanes in ufshcd_disable_tx_lcc()

From: Stanley Chu
Date: Wed Mar 18 2020 - 06:40:55 EST


In ufshcd_disable_tx_lcc(), if ufshcd_dme_get() or ufshcd_dme_peer_get()
get fail, uninitialized variable "tx_lanes" may be used as unexpected lane
ID for DME configuration.

Fix this issue by initializing "tx_lanes".

Signed-off-by: Stanley Chu <stanley.chu@xxxxxxxxxxxx>
Reviewed-by: Asutosh Das <asutoshd@xxxxxxxxxxxxxx>
Reviewed-by: Avri Altman <avri.altman@xxxxxxx>
Reviewed-by: Can Guo <cang@xxxxxxxxxxxxxx>
---
drivers/scsi/ufs/ufshcd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 5698f1164a5e..314e808b0d4e 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -4315,7 +4315,7 @@ EXPORT_SYMBOL_GPL(ufshcd_hba_enable);

static int ufshcd_disable_tx_lcc(struct ufs_hba *hba, bool peer)
{
- int tx_lanes, i, err = 0;
+ int tx_lanes = 0, i, err = 0;

if (!peer)
ufshcd_dme_get(hba, UIC_ARG_MIB(PA_CONNECTEDTXDATALANES),
--
2.18.0