diff mbox

[RFC,33/60] hyper_dmabuf: error checking on the result of dma_buf_map_attachment

Message ID 1513711816-2618-33-git-send-email-dongwon.kim@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Kim, Dongwon Dec. 19, 2017, 7:29 p.m. UTC 
From: Mateusz Polrola <mateuszx.potrola@intel.com>

Added error checking on the result of function call,
dma_buf_map_attachment

Signed-off-by: Dongwon Kim <dongwon.kim@intel.com>
---
 drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox

Patch

diff --git a/drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.c b/drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.c
index c0048d9..476c0d7 100644
--- a/drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.c
+++ b/drivers/xen/hyper_dmabuf/hyper_dmabuf_ioctl.c
@@ -149,6 +149,11 @@  static int hyper_dmabuf_export_remote(struct file *filp, void *data)
 
 	sgt = dma_buf_map_attachment(attachment, DMA_BIDIRECTIONAL);
 
+	if (IS_ERR(sgt)) {
+		dev_err(hyper_dmabuf_private.device, "Cannot map attachment\n");
+		return PTR_ERR(sgt);
+	}
+
 	sgt_info = kcalloc(1, sizeof(*sgt_info), GFP_KERNEL);
 
 	if(!sgt_info) {