From: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Date: Wed, 22 Aug 2007 21:01:51 +0000 (-0700)
Subject: w1: fix w1_remove_master_device() searching
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=59d9445e851976d973a5a4009f80a3d55959d231;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

w1: fix w1_remove_master_device() searching

In case bus master driver provided bogus value as its private data, search
can be incorrect.  Problem found by Adrian Bunk.

Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Cc: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/drivers/w1/w1_int.c b/drivers/w1/w1_int.c
index 2fbd8dd16df5..6840dfebe4d4 100644
--- a/drivers/w1/w1_int.c
+++ b/drivers/w1/w1_int.c
@@ -170,22 +170,24 @@ void __w1_remove_master_device(struct w1_master *dev)
 
 void w1_remove_master_device(struct w1_bus_master *bm)
 {
-	struct w1_master *dev = NULL;
+	struct w1_master *dev, *found = NULL;
 
 	list_for_each_entry(dev, &w1_masters, w1_master_entry) {
 		if (!dev->initialized)
 			continue;
 
-		if (dev->bus_master->data == bm->data)
+		if (dev->bus_master->data == bm->data) {
+			found = dev;
 			break;
+		}
 	}
 
-	if (!dev) {
+	if (!found) {
 		printk(KERN_ERR "Device doesn't exist.\n");
 		return;
 	}
 
-	__w1_remove_master_device(dev);
+	__w1_remove_master_device(found);
 }
 
 EXPORT_SYMBOL(w1_add_master_device);