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@xxxxxxxxxx>
diff --git a/drivers/char/snsc.c b/drivers/char/snsc.c
index 10e5632..ec07f0e 100644
--- a/drivers/char/snsc.c
+++ b/drivers/char/snsc.c
@@ -285,7 +285,7 @@ scdrv_write(struct file *file, const char __user *buf,
DECLARE_WAITQUEUE(wait, current);
if (file->f_flags & O_NONBLOCK) {
- spin_unlock(&sd->sd_wlock);
+ spin_unlock_irqrestore(&sd->sd_wlock, flags);
up(&sd->sd_wbs);
return -EAGAIN;
}
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