linux-kernel - [PATCH v1] drivers/ata/libata-core: check return value of sata_scr

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Date:   Sun, 28 Aug 2022 13:44:43 -0700
From:   Li Zhong <floridsleeves@...il.com>
To:     linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org
Cc:     damien.lemoal@...nsource.wdc.com,
        Li Zhong <floridsleeves@...il.com>
Subject: [PATCH v1] drivers/ata/libata-core: check return value of sata_scr_read()

sata_scr_read() could return 0 on failure. Check the return value.

Signed-off-by: Li Zhong <floridsleeves@...il.com>
---
 drivers/ata/libata-core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 826d41f341e4..ae08c7d35cb0 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3021,7 +3021,8 @@ static void sata_print_link_status(struct ata_link *link)
 
 	if (sata_scr_read(link, SCR_STATUS, &sstatus))
 		return;
-	sata_scr_read(link, SCR_CONTROL, &scontrol);
+	if (sata_scr_read(link, SCR_CONTROL, &scontrol))
+		return;
 
 	if (ata_phys_link_online(link)) {
 		tmp = (sstatus >> 4) & 0xf;
-- 
2.25.1