alpha: use BUG_ON where possible

Just use BUG_ON() instead of constructions such as:

	if (...)
		BUG()

A simplified version of the semantic patch that makes this transformation
is as follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression e;
@@
- if (e) BUG();
+ BUG_ON(e);
// </smpl>

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 4 insertions, 8 deletions

diff --git a/arch/alpha/kernel/pci_iommu.c b/arch/alpha/kernel/pci_iommu.c
index 3f844d26d2c7..a21d0ab3b19e 100644
--- a/arch/alpha/kernel/pci_iommu.c
+++ b/arch/alpha/kernel/pci_iommu.c
@@ -354,8 +354,7 @@ static dma_addr_t alpha_pci_map_page(struct device *dev, struct page *page,
         struct pci_dev *pdev = alpha_gendev_to_pci(dev);
         int dac_allowed;
 
-        if (dir == PCI_DMA_NONE)
-                BUG();
+        BUG_ON(dir == PCI_DMA_NONE);
 
         dac_allowed = pdev ? pci_dac_dma_supported(pdev, pdev->dma_mask) : 0; 
         return pci_map_single_1(pdev, (char *)page_address(page) + offset, 
@@ -378,8 +377,7 @@ static void alpha_pci_unmap_page(struct device *dev, dma_addr_t dma_addr,
         struct pci_iommu_arena *arena;
         long dma_ofs, npages;
 
-        if (dir == PCI_DMA_NONE)
-                BUG();
+        BUG_ON(dir == PCI_DMA_NONE);
 
         if (dma_addr >= __direct_map_base
             && dma_addr < __direct_map_base + __direct_map_size) {
@@ -662,8 +660,7 @@ static int alpha_pci_map_sg(struct device *dev, struct scatterlist *sg,
         dma_addr_t max_dma;
         int dac_allowed;
 
-        if (dir == PCI_DMA_NONE)
-                BUG();
+        BUG_ON(dir == PCI_DMA_NONE);
 
         dac_allowed = dev ? pci_dac_dma_supported(pdev, pdev->dma_mask) : 0;
 
@@ -742,8 +739,7 @@ static void alpha_pci_unmap_sg(struct device *dev, struct scatterlist *sg,
         dma_addr_t max_dma;
         dma_addr_t fbeg, fend;
 
-        if (dir == PCI_DMA_NONE)
-                BUG();
+        BUG_ON(dir == PCI_DMA_NONE);
 
         if (! alpha_mv.mv_pci_tbi)
                 return;