Drivers: hv : vmbus: Adding NULL pointer check

This patch fixes the following Coccinelle warning:
drivers/hv/ring_buffer.c:223: alloc with no test

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Lv Ruyi <lv.ruyi@zte.com.cn>
Link: https://lore.kernel.org/r/20211028104138.14576-1-lv.ruyi@zte.com.cn
Signed-off-by: Wei Liu <wei.liu@kernel.org>

diff --git a/drivers/hv/ring_buffer.c b/drivers/hv/ring_buffer.c
index 931802a..71efacb 100644 (file)
--- a/drivers/hv/ring_buffer.c
+++ b/drivers/hv/ring_buffer.c
@@ -223,6 +223,8 @@ int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info,
                pages_wraparound = kcalloc(page_cnt * 2 - 1,
                                           sizeof(struct page *),
                                           GFP_KERNEL);
+               if (!pages_wraparound)
+                       return -ENOMEM;
 
                pages_wraparound[0] = pages;
                for (i = 0; i < 2 * (page_cnt - 1); i++)