From 93fe23d8a9d95d8a85dfe2cb37cd9f220bef11b8 Mon Sep 17 00:00:00 2001 From: Kulikov Vasiliy Date: Sat, 17 Jul 2010 19:19:07 +0400 Subject: [PATCH] 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/) // @ r1 @ identifier f; @@ int f(...) { ... } @@ identifier r1.f; type T; unsigned T x; @@ *x = f(...) ... *x > 0 Signed-off-by: Kulikov Vasiliy Signed-off-by: Kevin Hilman --- arch/arm/mach-davinci/dma.c | 8 ++++++-- 1 file 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"); -- 2.20.1