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 <[email protected]> --- arch/arm/mach-davinci/dma.c | 8 ++++++-- 1 files changed, 6 insertions(+), 2 deletions(-) diff --git a/arch/arm/mach-davinci/dma.c b/arch/arm/mach-davinci/dma.c index d33827a..d1127e1 100644 --- a/arch/arm/mach-davinci/dma.c +++ b/arch/arm/mach-davinci/dma.c @@ -344,10 +344,12 @@ 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"); @@ -398,10 +400,12 @@ 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"); -- 1.7.0.4 _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
