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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Damien Le Moal <damien.lemoal@wdc.com>,
	kernel test robot <lkp@intel.com>, Hannes Reinecke <hare@suse.de>,
	Jens Axboe <axboe@kernel.dk>, Sasha Levin <sashal@kernel.org>,
	linux-ide@vger.kernel.org
Subject: [PATCH AUTOSEL 5.10 26/39] libata: fix ata_host_start()
Date: Sun,  5 Sep 2021 21:21:40 -0400	[thread overview]
Message-ID: <20210906012153.929962-26-sashal@kernel.org> (raw)
In-Reply-To: <20210906012153.929962-1-sashal@kernel.org>

From: Damien Le Moal <damien.lemoal@wdc.com>

[ 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@intel.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Link: https://lore.kernel.org/r/20210816014456.2191776-3-damien.lemoal@wdc.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 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


           reply	other threads:[~2021-09-06  1:26 UTC|newest]

Thread overview: expand[flat|nested]  mbox.gz  Atom feed
 [parent not found: <20210906012153.929962-1-sashal@kernel.org>]

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