[patch 2/2] drivers/block/umem.c: Use DMA_{32,64}BIT_MASK and correct call to pci_set_dma_mask()

[domen@coderock.org]

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From: Tobias Klauser <tklauser@nuerscht.ch>


Since nobody replied to Domen's request for clarification [1], here's a
patch to fix drivers/block/umem.c to correctly evaluate the return value
of pci_set_dma_mask() both times. The function returns non-null on
error, so this seems to be correct.

[1] http://lists.osdl.org/mailman/htdig/kernel-janitors/2005-May/004119.html

Use the DMA_{64,32}BIT_MASK constants from dma-mapping.h when calling
pci_set_dma_mask()
This patch includes dma-mapping.h explicitly because it caused errors
on some architectures otherwise.
See http://marc.theaimsgroup.com/?t=108001993000001&r=1&w=2 for details

Signed-off-by: Tobias Klauser <tklauser@nuerscht.ch>
Signed-off-by: Domen Puncer <domen@coderock.org>

---
 umem.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

Index: quilt/drivers/block/umem.c
===================================================================
--- quilt.orig/drivers/block/umem.c
+++ quilt/drivers/block/umem.c
@@ -892,8 +892,8 @@ static int __devinit mm_pci_probe(struct
 	printk(KERN_INFO "Micro Memory(tm) controller #%d found at %02x:%02x (PCI Mem Module (Battery Backup))\n",
 	       card->card_number, dev->bus->number, dev->devfn);
 
-	if (pci_set_dma_mask(dev, 0xffffffffffffffffLL) &&
-	    !pci_set_dma_mask(dev, 0xffffffffLL)) {
+	if (pci_set_dma_mask(dev, DMA_64BIT_MASK) &&
+	    pci_set_dma_mask(dev, DMA_32BIT_MASK)) {
 		printk(KERN_WARNING "MM%d: NO suitable DMA found\n",num_cards);
 		return  -ENOMEM;
 	}

--