[PATCH] 2.6.8.1-mm3: nsc-ircc driver crashes on shutdown

[Petr Vandrovec]

Hi,
  bk-dma-decleare-coherent-memory patch adds a requirement for dma_free_coherent
that dev cannot be NULL... But it can (nsc-ircc has no suitable dev) and as
dma_alloc_coherent allows NULL dev, dma_free_coherent should allow it too
IMHO.
						Thanks,
							Petr Vandrovec


diff -urN linux/arch/i386/kernel/pci-dma.c linux/arch/i386/kernel/pci-dma.c
--- linux/arch/i386/kernel/pci-dma.c	2004-08-21 00:51:49.000000000 +0200
+++ linux/arch/i386/kernel/pci-dma.c	2004-08-21 13:51:03.000000000 +0200
@@ -58,7 +58,7 @@
 void dma_free_coherent(struct device *dev, size_t size,
 			 void *vaddr, dma_addr_t dma_handle)
 {
-	struct dma_coherent_mem *mem = dev->dma_mem;
+	struct dma_coherent_mem *mem = dev ? dev->dma_mem : NULL;
 	int order = get_order(size);
 	
 	if (mem && vaddr >= mem->virt_base && vaddr < (mem->virt_base + (mem->size << PAGE_SHIFT))) {
-
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