Re: [PATCH v2 2/9] libata: fix ata_host_start()

The loop on entry of ata_host_start() may not initialize host->ops to
a non NULL value. The test on the host_stop field of host->ops must
then be preceded by a check that host->ops is not NULL.

Reported-by: kernel test robot <redacted>
Signed-off-by: Damien Le Moal <redacted>
---
 drivers/ata/libata-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index ea8b91297f12..fe49197caf99 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c

@@ -5573,7 +5573,7 @@ int ata_host_start(struct ata_host *host)
 			have_stop = 1;
 	}
 
-	if (host->ops->host_stop)
+	if (host->ops && host->ops->host_stop)