From: Jesper Juhl <jesper.juhl@gmail.com>
Date: Sat, 25 Mar 2006 11:07:02 +0000 (-0800)
Subject: [PATCH] ISDN: fix copy_to_user() unused result warning in isdn_ppp
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c41a24ce1fe13638732885859011321af862960a;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[PATCH] ISDN: fix copy_to_user() unused result warning in isdn_ppp

   drivers/isdn/i4l/isdn_ppp.c:785: warning: ignoring return value of `copy_to_user', declared with attribute warn_unused_result

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Karsten Keil <kkeil@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/isdn/i4l/isdn_ppp.c b/drivers/isdn/i4l/isdn_ppp.c
index 1a19a0f89428..b9fed8a3bcc6 100644
--- a/drivers/isdn/i4l/isdn_ppp.c
+++ b/drivers/isdn/i4l/isdn_ppp.c
@@ -782,7 +782,8 @@ isdn_ppp_read(int min, struct file *file, char __user *buf, int count)
 	is->first = b;
 
 	spin_unlock_irqrestore(&is->buflock, flags);
-	copy_to_user(buf, save_buf, count);
+	if (copy_to_user(buf, save_buf, count))
+		count = -EFAULT;
 	kfree(save_buf);
 
 	return count;