linux-kernel - [PATCH 023/115] gpu: ion: Don't call ion_buffer

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Message-Id: <1386973529-4884-24-git-send-email-john.stultz@linaro.org>
Date:	Fri, 13 Dec 2013 14:23:57 -0800
From:	John Stultz <john.stultz@...aro.org>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	Android Kernel Team <kernel-team@...roid.com>,
	Sumit Semwal <sumit.semwal@...aro.org>,
	Jesse Barker <jesse.barker@....com>,
	Colin Cross <ccross@...roid.com>,
	Laura Abbott <lauraa@...eaurora.org>,
	John Stultz <john.stultz@...aro.org>
Subject: [PATCH 023/115] gpu: ion: Don't call ion_buffer_put on error path

From: Laura Abbott <lauraa@...eaurora.org>

If dma_buf_fd fails, the dma_buf needs to be cleaned up by
calling dma_buf_put. dma_buf_put will call ion_dma_buf_release
which in turn calls ion_buffer_put to clean up the buffer
reference. Calling ion_buffer_put after dma_buf_put drops the
reference count by one more which is incorrect. Fix this by
getting rid of the extra ion_buffer_put call.

Signed-off-by: Laura Abbott <lauraa@...eaurora.org>
[jstultz: modified patch to apply to staging directory]
Signed-off-by: John Stultz <john.stultz@...aro.org>
---
 drivers/staging/android/ion/ion.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/android/ion/ion.c b/drivers/staging/android/ion/ion.c
index a054edd..4d91d20 100644
--- a/drivers/staging/android/ion/ion.c
+++ b/drivers/staging/android/ion/ion.c
@@ -925,10 +925,9 @@ int ion_share_dma_buf(struct ion_client *client, struct ion_handle *handle)
 		return PTR_ERR(dmabuf);
 	}
 	fd = dma_buf_fd(dmabuf, O_CLOEXEC);
-	if (fd < 0) {
+	if (fd < 0)
 		dma_buf_put(dmabuf);
-		ion_buffer_put(buffer);
-	}
+
 	return fd;
 }
 EXPORT_SYMBOL(ion_share_dma_buf);
-- 
1.8.3.2

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