From: Damien Le Moal <damien.lemoal@xxxxxxx> [ 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 <lkp@xxxxxxxxx> Signed-off-by: Damien Le Moal <damien.lemoal@xxxxxxx> Reviewed-by: Hannes Reinecke <hare@xxxxxxx> Link: https://lore.kernel.org/r/20210816014456.2191776-3-damien.lemoal@xxxxxxx Signed-off-by: Jens Axboe <axboe@xxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- 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 61c762961ca8..44f434acfce0 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) { -- 2.30.2
