From 01ccca3cb50dcff7eea01448af985a49859b8a1d Mon Sep 17 00:00:00 2001 From: Lv Ruyi Date: Thu, 28 Oct 2021 10:41:38 +0000 Subject: [PATCH] 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 Signed-off-by: Lv Ruyi Link: https://lore.kernel.org/r/20211028104138.14576-1-lv.ruyi@zte.com.cn Signed-off-by: Wei Liu --- drivers/hv/ring_buffer.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/hv/ring_buffer.c b/drivers/hv/ring_buffer.c index 931802ae985c..71efacb90965 100644 --- 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++)