From c143d43aa3149b83e4b40624a27aa2b18638afec Mon Sep 17 00:00:00 2001
From: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Date: Wed, 2 Apr 2008 13:04:43 -0700
Subject: [PATCH] alpha: fix ALSA DMA mmap crash
Make dma_alloc_coherent respect gfp flags (__GFP_COMP is one that
matters).
Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Tested-by: Michael Cree <mcree@orcon.net.nz>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
arch/alpha/kernel/pci_iommu.c | 8 +++++---
include/asm-alpha/dma-mapping.h | 2 +-
include/asm-alpha/pci.h | 8 +++++++-
3 files changed, 13 insertions(+), 5 deletions(-)
diff --git a/arch/alpha/kernel/pci_iommu.c b/arch/alpha/kernel/pci_iommu.c
index 4e1c08636edd6..dd6e334ab9e12 100644
--- a/arch/alpha/kernel/pci_iommu.c
+++ b/arch/alpha/kernel/pci_iommu.c
@@ -424,11 +424,13 @@ EXPORT_SYMBOL(pci_unmap_page);
else DMA_ADDRP is undefined. */
void *
-pci_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr_t *dma_addrp)
+__pci_alloc_consistent(struct pci_dev *pdev, size_t size,
+ dma_addr_t *dma_addrp, gfp_t gfp)
{
void *cpu_addr;
long order = get_order(size);
- gfp_t gfp = GFP_ATOMIC;
+
+ gfp &= ~GFP_DMA;
try_again:
cpu_addr = (void *)__get_free_pages(gfp, order);
@@ -458,7 +460,7 @@ pci_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr_t *dma_addrp)
return cpu_addr;
}
-EXPORT_SYMBOL(pci_alloc_consistent);
+EXPORT_SYMBOL(__pci_alloc_consistent);
/* Free and unmap a consistent DMA buffer. CPU_ADDR and DMA_ADDR must
be values that were returned from pci_alloc_consistent. SIZE must
diff --git a/include/asm-alpha/dma-mapping.h b/include/asm-alpha/dma-mapping.h
index 75a1aff5b57b2..db351d1296f4b 100644
--- a/include/asm-alpha/dma-mapping.h
+++ b/include/asm-alpha/dma-mapping.h
@@ -11,7 +11,7 @@
#define dma_unmap_single(dev, addr, size, dir) \
pci_unmap_single(alpha_gendev_to_pci(dev), addr, size, dir)
#define dma_alloc_coherent(dev, size, addr, gfp) \
- pci_alloc_consistent(alpha_gendev_to_pci(dev), size, addr)
+ __pci_alloc_consistent(alpha_gendev_to_pci(dev), size, addr, gfp)
#define dma_free_coherent(dev, size, va, addr) \
pci_free_consistent(alpha_gendev_to_pci(dev), size, va, addr)
#define dma_map_page(dev, page, off, size, dir) \
diff --git a/include/asm-alpha/pci.h b/include/asm-alpha/pci.h
index d5b10ef643642..d31fd49ff79a4 100644
--- a/include/asm-alpha/pci.h
+++ b/include/asm-alpha/pci.h
@@ -76,7 +76,13 @@ extern inline void pcibios_penalize_isa_irq(int irq, int active)
successful and sets *DMA_ADDRP to the pci side dma address as well,
else DMA_ADDRP is undefined. */
-extern void *pci_alloc_consistent(struct pci_dev *, size_t, dma_addr_t *);
+extern void *__pci_alloc_consistent(struct pci_dev *, size_t,
+ dma_addr_t *, gfp_t);
+static inline void *
+pci_alloc_consistent(struct pci_dev *dev, size_t size, dma_addr_t *dma)
+{
+ return __pci_alloc_consistent(dev, size, dma, GFP_ATOMIC);
+}
/* Free and unmap a consistent DMA buffer. CPU_ADDR and DMA_ADDR must
be values that were returned from pci_alloc_consistent. SIZE must
--
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