linux-kernel - [PATCH 1/1] drivers/amba/bus.c: Don't perform extra matching when any one fails

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Message-Id: <1314899715-20311-1-git-send-email-consul.kautuk@gmail.com>
Date:	Thu,  1 Sep 2011 23:25:15 +0530
From:	Kautuk Consul <consul.kautuk@...il.com>
To:	Russell King <linux@....linux.org.uk>
Cc:	linux-kernel@...r.kernel.org,
	Kautuk Consul <consul.kautuk@...il.com>
Subject: [PATCH 1/1] drivers/amba/bus.c: Don't perform extra matching when any one fails

If any one operation fails, then r anyways gets set to 0, which will
cause the device to not match the find_data.

Signed-off-by: Kautuk Consul <consul.kautuk@...il.com>
---
 drivers/amba/bus.c |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c
index d74926e..af2e0a1 100644
--- a/drivers/amba/bus.c
+++ b/drivers/amba/bus.c
@@ -699,10 +699,12 @@ static int amba_find_match(struct device *dev, void *data)
 	int r;
 
 	r = (pcdev->periphid & d->mask) == d->id;
-	if (d->parent)
-		r &= d->parent == dev->parent;
-	if (d->busid)
-		r &= strcmp(dev_name(dev), d->busid) == 0;
+	if (r) {
+		if (d->parent)
+			r &= d->parent == dev->parent;
+		if (r && d->busid)
+			r &= strcmp(dev_name(dev), d->busid) == 0;
+	}
 
 	if (r) {
 		get_device(dev);
-- 
1.7.4.1

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