direct-io.hg

changeset 6073:e87001315978

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dma_map_single can't sleep since it may be called with locks held, or
interrupts off, etc. Thus it shouldn't make sleeping allocations.

Signed-off-by: Chris Wright <chrisw@osdl.org>
author kaf24@firebug.cl.cam.ac.uk
date Wed Aug 10 09:50:05 2005 +0000 (2005-08-10)
parents 878ba6d3954e
children d74e320900fd
files linux-2.6-xen-sparse/arch/xen/i386/kernel/pci-dma.c linux-2.6-xen-sparse/arch/xen/x86_64/kernel/pci-dma.c
line diff
     1.1 --- a/linux-2.6-xen-sparse/arch/xen/i386/kernel/pci-dma.c	Wed Aug 10 09:45:06 2005 +0000
     1.2 +++ b/linux-2.6-xen-sparse/arch/xen/i386/kernel/pci-dma.c	Wed Aug 10 09:50:05 2005 +0000
     1.3 @@ -182,8 +182,8 @@ dma_map_single(struct device *dev, void 
     1.4  	if ((((unsigned int)ptr & ~PAGE_MASK) + size) <= PAGE_SIZE) {
     1.5  		dma = virt_to_bus(ptr);
     1.6  	} else {
     1.7 -		BUG_ON((bnc = dma_alloc_coherent(dev, size, &dma, 0)) == NULL);
     1.8 -		BUG_ON((ent = kmalloc(sizeof(*ent), GFP_KERNEL)) == NULL);
     1.9 +		BUG_ON((bnc = dma_alloc_coherent(dev, size, &dma, GFP_ATOMIC)) == NULL);
    1.10 +		BUG_ON((ent = kmalloc(sizeof(*ent), GFP_ATOMIC)) == NULL);
    1.11  		if (direction != DMA_FROM_DEVICE)
    1.12  			memcpy(bnc, ptr, size);
    1.13  		ent->dma    = dma;

     2.1 --- a/linux-2.6-xen-sparse/arch/xen/x86_64/kernel/pci-dma.c	Wed Aug 10 09:45:06 2005 +0000
     2.2 +++ b/linux-2.6-xen-sparse/arch/xen/x86_64/kernel/pci-dma.c	Wed Aug 10 09:50:05 2005 +0000
     2.3 @@ -234,8 +234,8 @@ dma_map_single(struct device *dev, void 
     2.4  	if (((((unsigned long)ptr) & ~PAGE_MASK) + size) <= PAGE_SIZE) {
     2.5  		dma = virt_to_bus(ptr);
     2.6  	} else {
     2.7 -		BUG_ON((bnc = dma_alloc_coherent(dev, size, &dma, 0)) == NULL);
     2.8 -		BUG_ON((ent = kmalloc(sizeof(*ent), GFP_KERNEL)) == NULL);
     2.9 +		BUG_ON((bnc = dma_alloc_coherent(dev, size, &dma, GFP_ATOMIC)) == NULL);
    2.10 +		BUG_ON((ent = kmalloc(sizeof(*ent), GFP_ATOMIC)) == NULL);
    2.11  		if (direction != DMA_FROM_DEVICE)
    2.12  			memcpy(bnc, ptr, size);
    2.13  		ent->dma    = dma;