ata: libata-core: Check errors in sata_print_link_status()

sata_scr_read() could return negative error code on failure. Check the
return value when reading the control register.

Signed-off-by: Li Zhong <floridsleeves@gmail.com>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index d0242c75aac59b8ef25659bd182b01415c2c8547..75b86913db1ac90f8d058f91037310f13caf0c15 100644 (file)
--- 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;