linux-kernel - [PATCH 08/12] Blackfin arch: add missing gpio error handling to make sure we roll back requests in case one fails

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Date:	Wed,  8 Aug 2007 11:35:33 +0800
From:	Bryan Wu <bryan.wu@...log.com>
To:	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org
Cc:	dbrownell@...rs.sourceforge.net,
	Michael Hennerich <michael.hennerich@...log.com>,
	Bryan Wu <bryan.wu@...log.com>
Subject: [PATCH 08/12] Blackfin arch: add missing gpio error handling to make sure we roll back requests in case one fails

From: Michael Hennerich <michael.hennerich@...log.com>

Signed-off-by: Michael Hennerich <michael.hennerich@...log.com>
Signed-off-by: Bryan Wu <bryan.wu@...log.com>
---
 arch/blackfin/kernel/bfin_gpio.c |   10 ++++++++--
 arch/blackfin/mach-bf548/gpio.c  |   11 +++++++++--
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c
index 5d488ef..f712772 100644
--- a/arch/blackfin/kernel/bfin_gpio.c
+++ b/arch/blackfin/kernel/bfin_gpio.c
@@ -711,9 +711,15 @@ int peripheral_request_list(unsigned short per[], const char *label)
 	int ret;
 
 	for (cnt = 0; per[cnt] != 0; cnt++) {
+
 		ret = peripheral_request(per[cnt], label);
-		if (ret < 0)
-			return ret;
+
+		if (ret < 0) {
+			for ( ; cnt > 0; cnt--) {
+				peripheral_free(per[cnt - 1]);
+			}
+		return ret;
+		}
 	}
 
 	return 0;
diff --git a/arch/blackfin/mach-bf548/gpio.c b/arch/blackfin/mach-bf548/gpio.c
index c073ab3..f3b9dea 100644
--- a/arch/blackfin/mach-bf548/gpio.c
+++ b/arch/blackfin/mach-bf548/gpio.c
@@ -212,11 +212,18 @@ int peripheral_request_list(unsigned short per[], const char *label)
 	int ret;
 
 	for (cnt = 0; per[cnt] != 0; cnt++) {
+
 		ret = peripheral_request(per[cnt], label);
-		if (ret < 0)
-			return ret;
+
+		if (ret < 0) {
+			for ( ; cnt > 0; cnt--) {
+				peripheral_free(per[cnt - 1]);
+			}
+		return ret;
+		}
 	}
 
+
 	return 0;
 }
 EXPORT_SYMBOL(peripheral_request_list);
-- 
1.5.2
-
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