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snsc: restore IRQs on error path in scdrv_write() 

This bug is as old as git.  We need to be calling spin_unlock_irqrestore()
instead of regular spin_unlock() here.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Carpenter 2016-11-18 14:30:57 +03:00 committed by Greg Kroah-Hartman
parent dd5c472a60
commit da191c28f5
1 changed files with 1 additions and 1 deletions
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2
drivers/char/snsc.c
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@ -285,7 +285,7 @@ scdrv_write(struct file *file, const char __user *buf,
DECLARE_WAITQUEUE(wait, current); DECLARE_WAITQUEUE(wait, current);
if (file->f_flags & O_NONBLOCK) { if (file->f_flags & O_NONBLOCK) {
spin_unlock(&sd->sd_wlock); spin_unlock_irqrestore(&sd->sd_wlock, flags);
up(&sd->sd_wbs); up(&sd->sd_wbs);
return -EAGAIN; return -EAGAIN;
} }