From: Dmitry Kalinkin <dmitry.kalinkin@gmail.com>
Date: Thu, 28 May 2015 12:07:02 +0000 (+0300)
Subject: staging: vme_user: refactor llseek to switch(){}
X-Git-Tag: firefly_0821_release~176^2~1545^2~160
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=615c40dd9f884add78cc3048167b59856d241fa3;p=firefly-linux-kernel-4.4.55.git

staging: vme_user: refactor llseek to switch(){}

This makes vme_user_llseek ignore all minors that don't have llseek
implementation.

Signed-off-by: Dmitry Kalinkin <dmitry.kalinkin@gmail.com>
Cc: Igor Alekseev <igor.alekseev@itep.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/vme/devices/vme_user.c b/drivers/staging/vme/devices/vme_user.c
index 19ba749bb122..da828f48b2ef 100644
--- a/drivers/staging/vme/devices/vme_user.c
+++ b/drivers/staging/vme/devices/vme_user.c
@@ -430,15 +430,17 @@ static loff_t vme_user_llseek(struct file *file, loff_t off, int whence)
 	size_t image_size;
 	loff_t res;
 
-	if (minor == CONTROL_MINOR)
-		return -EINVAL;
-
-	mutex_lock(&image[minor].mutex);
-	image_size = vme_get_size(image[minor].resource);
-	res = fixed_size_llseek(file, off, whence, image_size);
-	mutex_unlock(&image[minor].mutex);
+	switch (type[minor]) {
+	case MASTER_MINOR:
+	case SLAVE_MINOR:
+		mutex_lock(&image[minor].mutex);
+		image_size = vme_get_size(image[minor].resource);
+		res = fixed_size_llseek(file, off, whence, image_size);
+		mutex_unlock(&image[minor].mutex);
+		return res;
+	}
 
-	return res;
+	return -EINVAL;
 }
 
 /*