usb: core: hcd: Fix return value check in usb_hcd_setup_local_mem()

If dmam_alloc_attrs() fails, it returns NULL pointer and never
return ERR_PTR(), so repleace IS_ERR() with IS_ERR_OR_NULL()
and if it's NULL, returns -ENOMEM.

Fixes: 9ba26f5cecd8 ("ARM: sa1100/assabet: move dmabounce hack to ohci driver")
Signed-off-by: Yang Yingliang <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/core/hcd.c

···
 					     GFP_KERNEL,
 					     DMA_ATTR_WRITE_COMBINE);
 
-	if (IS_ERR(local_mem))
+	if (IS_ERR_OR_NULL(local_mem)) {
+		if (!local_mem)
+			return -ENOMEM;
+
 		return PTR_ERR(local_mem);
+	}
 
 	/*
 	 * Here we pass a dma_addr_t but the arg type is a phys_addr_t.