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| author |   Glauber Costa <gcosta@redhat.com> | 2008-04-08 13:20:49 -0300 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2008-04-19 19:19:57 +0200 |
| commit | 5b3e5b7273435f8a7f83d3556a09adfd6f247e36 (patch) | |
| tree | bc2406c017d2e570d33e0e349e028a9213518b1e /arch/x86/kernel/pci-nommu_64.c | |
| parent | x86: use sg_phys in x86_64 (diff) | |
| download | linux-dev-5b3e5b7273435f8a7f83d3556a09adfd6f247e36.tar.xz linux-dev-5b3e5b7273435f8a7f83d3556a09adfd6f247e36.zip | |
x86: use WARN_ON in mapping functions
In the very same way i386 do, we use WARN_ON functions
in map_simple and map_sg.
Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/pci-nommu_64.c')
| -rw-r--r-- | arch/x86/kernel/pci-nommu_64.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kernel/pci-nommu_64.c b/arch/x86/kernel/pci-nommu_64.c index c6901e751770..8d036aee2a8d 100644 --- a/arch/x86/kernel/pci-nommu_64.c +++ b/arch/x86/kernel/pci-nommu_64.c @@ -30,6 +30,7 @@ nommu_map_single(struct device *hwdev, phys_addr_t paddr, size_t size, int direction) { dma_addr_t bus = paddr; + WARN_ON(size == 0); if (!check_addr("map_single", hwdev, bus, size)) return bad_dma_address; flush_write_buffers(); @@ -58,6 +59,8 @@ static int nommu_map_sg(struct device *hwdev, struct scatterlist *sg, struct scatterlist *s; int i; + WARN_ON(nents == 0 || sg[0].length == 0); + for_each_sg(sg, s, nents, i) { BUG_ON(!sg_page(s)); s->dma_address = sg_phys(s); |