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spi/mpc8xxx: don't check platform_get_irq's return value against zero

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platform_get_irq returns -ENXIO on failure, so !irq was probably
always true.  Make irq a signed variable and compare irq <= 0.  Note
that a return value of zero is still handled as error even though this
could mean irq0.

This is a followup to 305b3228f9 that
changed the return value of platform_get_irq from 0 to -ENXIO on error.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Uwe Kleine-König 2010-01-20 13:49:44 -07:00 committed by Grant Likely
parent 34b8c66173
commit e9a172f074
1 changed files with 2 additions and 2 deletions
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4
drivers/spi/spi_mpc8xxx.c
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@ -1328,7 +1328,7 @@ static struct of_platform_driver of_mpc8xxx_spi_driver = {
static int __devinit plat_mpc8xxx_spi_probe(struct platform_device *pdev)
{
struct resource *mem;
unsigned int irq;
int irq;
struct spi_master *master;
if (!pdev->dev.platform_data)
@ -1339,7 +1339,7 @@ static int __devinit plat_mpc8xxx_spi_probe(struct platform_device *pdev)
return -EINVAL;
irq = platform_get_irq(pdev, 0);
if (!irq)
if (irq <= 0)
return -EINVAL;
master = mpc8xxx_spi_probe(&pdev->dev, mem, irq);