From a3a9bd95ea987df87e39f5a3747ceb4280bf3a3c Mon Sep 17 00:00:00 2001 From: Damien Le Moal Date: Mon, 16 Aug 2021 10:44:47 +0900 Subject: [PATCH] libata: fix ata_host_start() [ Upstream commit 355a8031dc174450ccad2a61c513ad7222d87a97 ] 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 Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Link: https://lore.kernel.org/r/20210816014456.2191776-3-damien.lemoal@wdc.com Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- 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 61c762961ca8e..44f434acfce08 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) have_stop = 1; if (have_stop) {