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authorKulikov Vasiliy <segooon@gmail.com>2010-07-17 19:19:07 +0400
committerKevin Hilman <khilman@deeprootsystems.com>2010-09-24 07:40:25 -0700
commit93fe23d8a9d95d8a85dfe2cb37cd9f220bef11b8 (patch)
treea253cfb59f9f5c602bed645b02a4fe3fa0de2e8b /arch/arm/mach-davinci
parent85b8307fd03badbff0da5a75776c62cb45ee6551 (diff)
downloadblackbird-op-linux-93fe23d8a9d95d8a85dfe2cb37cd9f220bef11b8.tar.gz
blackbird-op-linux-93fe23d8a9d95d8a85dfe2cb37cd9f220bef11b8.zip
arm: mach-davinci: check irq2ctlr() result
If irq2ctlr() fails return IRQ_NONE. Also as it can fail make 'ctlr' signed. The semantic patch that finds this problem (many false-positive results): (http://coccinelle.lip6.fr/) // <smpl> @ r1 @ identifier f; @@ int f(...) { ... } @@ identifier r1.f; type T; unsigned T x; @@ *x = f(...) ... *x > 0 Signed-off-by: Kulikov Vasiliy <segooon@gmail.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-davinci')
-rw-r--r--arch/arm/mach-davinci/dma.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/arm/mach-davinci/dma.c b/arch/arm/mach-davinci/dma.c
index 2ede598b77dd..6b9669869c46 100644
--- a/arch/arm/mach-davinci/dma.c
+++ b/arch/arm/mach-davinci/dma.c
@@ -354,10 +354,12 @@ static int irq2ctlr(int irq)
static irqreturn_t dma_irq_handler(int irq, void *data)
{
int i;
- unsigned ctlr;
+ int ctlr;
unsigned int cnt = 0;
ctlr = irq2ctlr(irq);
+ if (ctlr < 0)
+ return IRQ_NONE;
dev_dbg(data, "dma_irq_handler\n");
@@ -408,10 +410,12 @@ static irqreturn_t dma_irq_handler(int irq, void *data)
static irqreturn_t dma_ccerr_handler(int irq, void *data)
{
int i;
- unsigned ctlr;
+ int ctlr;
unsigned int cnt = 0;
ctlr = irq2ctlr(irq);
+ if (ctlr < 0)
+ return IRQ_NONE;
dev_dbg(data, "dma_ccerr_handler\n");
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