gpu: ion: Don't call ion_buffer_put on error path

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@codeaurora.org>
[jstultz: modified patch to apply to staging directory]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/android/ion/ion.c b/drivers/staging/android/ion/ion.c
index a054edd..4d91d20 100644 (file)
--- 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);