[PATCH v3 14/27] staging: ccree: handle end of sg list gracefully

[Gilad Ben-Yossef]

If we are asked for number of entries of an offset bigger than the
sg list we should not crash.

Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Gilad Ben-Yossef <gilad@xxxxxxxxxxxxx>
---
 drivers/staging/ccree/ssi_buffer_mgr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/ccree/ssi_buffer_mgr.c b/drivers/staging/ccree/ssi_buffer_mgr.c
index 78288ed..0f71264 100644
--- a/drivers/staging/ccree/ssi_buffer_mgr.c
+++ b/drivers/staging/ccree/ssi_buffer_mgr.c
@@ -94,7 +94,7 @@ static unsigned int cc_get_sgl_nents(struct device *dev,
 {
 	unsigned int nents = 0;
 
-	while (nbytes) {
+	while (nbytes && sg_list) {
 		if (sg_list->length) {
 			nents++;
 			/* get the number of bytes in the last entry */
-- 
2.7.4