swiotlb: remove an unecessary NULL check

Dan Carpenter · Christoph Hellwig · commit 698733fbdfcd · 2018-05-07T07:15:41.000+02:00
Smatch complains here:

    lib/swiotlb.c:730 swiotlb_alloc_buffer()
    warn: variable dereferenced before check 'dev' (see line 716)

"dev" isn't ever NULL in this function so we can just remove the check.

Signed-off-by: Dan Carpenter &lt;dan.carpenter@oracle.com&gt;
Signed-off-by: Christoph Hellwig &lt;hch@lst.de&gt;
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
@@ -727,7 +727,7 @@ swiotlb_alloc_buffer(struct device *dev, size_t size, dma_addr_t *dma_handle,
 
 out_unmap:
 	dev_warn(dev, "hwdev DMA mask = 0x%016Lx, dev_addr = 0x%016Lx\n",
-		(unsigned long long)(dev ? dev->coherent_dma_mask : 0),
+		(unsigned long long)dev->coherent_dma_mask,
 		(unsigned long long)*dma_handle);
 
 	/*
