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From: Ming Lei <ming.lei@redhat.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org, Ming Lei <ming.lei@redhat.com>
Subject: [PATCH] ublk: fix command op code check
Date: Fri,  5 May 2023 23:31:42 +0800	[thread overview]
Message-ID: <20230505153142.1258336-1-ming.lei@redhat.com> (raw)

In case of CONFIG_BLKDEV_UBLK_LEGACY_OPCODES, type of cmd opcode could
be 0 or 'u'; and type can only be 'u' if CONFIG_BLKDEV_UBLK_LEGACY_OPCODES
isn't set.

So fix the wrong check.

Fixes: 2d786e66c966 ("block: ublk: switch to ioctl command encoding")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
 drivers/block/ublk_drv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c
index 72a5cde9a5af..92cb2eb384f2 100644
--- a/drivers/block/ublk_drv.c
+++ b/drivers/block/ublk_drv.c
@@ -1281,7 +1281,7 @@ static inline int ublk_check_cmd_op(u32 cmd_op)
 {
 	u32 ioc_type = _IOC_TYPE(cmd_op);
 
-	if (IS_ENABLED(CONFIG_BLKDEV_UBLK_LEGACY_OPCODES) && ioc_type != 'u')
+	if (!IS_ENABLED(CONFIG_BLKDEV_UBLK_LEGACY_OPCODES) && ioc_type != 'u')
 		return -EOPNOTSUPP;
 
 	if (ioc_type != 'u' && ioc_type != 0)
-- 
2.38.1


             reply	other threads:[~2023-05-05 15:32 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-05 15:31 Ming Lei [this message]
2023-05-12 15:08 ` [PATCH] ublk: fix command op code check Ming Lei
2023-05-12 15:09   ` Jens Axboe
2023-05-12 15:09 ` Jens Axboe

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