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authorGlauber Costa <gcosta@redhat.com>2008-04-08 13:20:49 -0300
committerIngo Molnar <mingo@elte.hu>2008-04-19 19:19:57 +0200
commit5b3e5b7273435f8a7f83d3556a09adfd6f247e36 (patch)
treebc2406c017d2e570d33e0e349e028a9213518b1e
parent30db2cbf38d68f466fd34488f8312a151225c9ac (diff)
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>
-rw-r--r--arch/x86/kernel/pci-nommu_64.c3
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 c6901e75177..8d036aee2a8 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);