From: Chengguang Xu <cgxu519@gmx.com>
To: gregkh@linuxfoundation.org
Cc: linux-kernel@vger.kernel.org, Chengguang Xu <cgxu519@gmx.com>
Subject: [PATCH] uio: remove redundant check
Date: Sat, 19 Jan 2019 21:15:34 +0800 [thread overview]
Message-ID: <20190119131534.13434-1-cgxu519@gmx.com> (raw)
It is not necessary to check idev->info several times under
mutex lock, so just remove redundant check.
Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
---
drivers/uio/uio.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index 46e5c1c31ebe..effe72834c2f 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -494,7 +494,7 @@ static int uio_open(struct inode *inode, struct file *filep)
goto err_infoopen;
}
- if (idev->info && idev->info->open)
+ if (idev->info->open)
ret = idev->info->open(idev->info, inode);
mutex_unlock(&idev->info_lock);
if (ret)
@@ -635,7 +635,7 @@ static ssize_t uio_write(struct file *filep, const char __user *buf,
goto out;
}
- if (!idev->info || !idev->info->irq) {
+ if (!idev->info->irq) {
retval = -EIO;
goto out;
}
--
2.17.2
reply other threads:[~2019-01-19 13:15 UTC|newest]
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