ath9k: Clarify we only want 32-bit DMA

Use DMA_32BIT_MASK to clarify we only want 32-bit DMA
memory. What was there before is also 32-bit but this makes it
clearer

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c
index c928db9dc0f0..9d64ef565c03 100644
--- a/drivers/net/wireless/ath9k/main.c
+++ b/drivers/net/wireless/ath9k/main.c
@@ -1591,9 +1591,8 @@ static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
         if (pci_enable_device(pdev))
                 return -EIO;
 
-        /* XXX 32-bit addressing only */
-        if (pci_set_dma_mask(pdev, 0xffffffff)) {
-                printk(KERN_ERR "ath_pci: 32-bit DMA not available\n");
+        if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
+                printk(KERN_ERR "ath9k: 32-bit DMA not available\n");
                 ret = -ENODEV;
                 goto bad;
         }