[PATCH v4 01/11] scsi: ufs: dwc: Return a negative error if the link is down

[Larisa Grigore <larisa.grigore@oss.nxp.com>]

ufshcd_dwc_link_is_up() returns 1 when the UniPro link is not up. The
value may propagate through callers that expect failures to be reported as
negative errno values.

Return -ENOLINK when the link is down and propagate errors returned by
ufshcd_dme_get().

Fixes: 4b9ffb5a353b ("ufs: add support for DesignWare Controller")
Signed-off-by: Larisa Grigore <larisa.grigore@oss.nxp.com>
---
 drivers/ufs/host/ufshcd-dwc.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/ufs/host/ufshcd-dwc.c b/drivers/ufs/host/ufshcd-dwc.c
index 21b1cf912dcc..ccf785fce6cc 100644
--- a/drivers/ufs/host/ufshcd-dwc.c
+++ b/drivers/ufs/host/ufshcd-dwc.c
@@ -48,20 +48,23 @@ static void ufshcd_dwc_program_clk_div(struct ufs_hba *hba, u32 divider_val)
  * ufshcd_dwc_link_is_up() - check if link is up.
  * @hba: private structure pointer
  *
- * Return: 0 on success, non-zero value on failure.
+ * Return: 0 on success, a negative errno value on failure.
  */
 static int ufshcd_dwc_link_is_up(struct ufs_hba *hba)
 {
 	int dme_result = 0;
+	int ret;
 
-	ufshcd_dme_get(hba, UIC_ARG_MIB(VS_POWERSTATE), &dme_result);
+	ret = ufshcd_dme_get(hba, UIC_ARG_MIB(VS_POWERSTATE), &dme_result);
+	if (ret)
+		return ret;
 
 	if (dme_result == UFSHCD_LINK_IS_UP) {
 		ufshcd_set_link_active(hba);
 		return 0;
 	}
 
-	return 1;
+	return -ENOLINK;
 }
 
 /**
-- 
2.43.0