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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>
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@ -223,6 +223,8 @@ int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info,
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pages_wraparound = kcalloc(page_cnt * 2 - 1,
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sizeof(struct page *),
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GFP_KERNEL);
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if (!pages_wraparound)
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return -ENOMEM;
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pages_wraparound[0] = pages;
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for (i = 0; i < 2 * (page_cnt - 1); i++)
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