linux-kernel - [PATCH] [RESEND] drivers/base dmam_declare_coherent

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Date:	Tue, 14 Jun 2016 09:58:37 +0200
From:	"Vyacheslav V. Yurkov" <uvv.mail@...il.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org,
	"Vyacheslav V. Yurkov" <uvv.mail@...il.com>
Subject: [PATCH] [RESEND] drivers/base dmam_declare_coherent_memory leaks

dmam_declare_coherent_memory doesn't take into account the return
value of dma_declare_coherent_memory, which leads to incorrect resource
handling

Signed-off-by: Vyacheslav V. Yurkov <uvv.mail@...il.com>
---
 drivers/base/dma-mapping.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/base/dma-mapping.c b/drivers/base/dma-mapping.c
index d799662..f5d2132 100644
--- a/drivers/base/dma-mapping.c
+++ b/drivers/base/dma-mapping.c
@@ -198,10 +198,13 @@ int dmam_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,
 
 	rc = dma_declare_coherent_memory(dev, phys_addr, device_addr, size,
 					 flags);
-	if (rc == 0)
+	if (rc) {
 		devres_add(dev, res);
-	else
+		rc = 0;
+	} else {
 		devres_free(res);
+		rc = -ENOMEM;
+	}
 
 	return rc;
 }
-- 
1.8.4