[PATCH 6/7] spi/mpc8xxx: don't check platform_get_irq's return value against zero

["Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>]

platform_get_irq returns -ENXIO on failure, so !irq was probably
always true.  Better use (int)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 305b3228f9ff4d59f49e6d34a7034d44ee8ce2f0 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>
Cc: David Vrabel <dvrabel@arcom.com>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: spi-devel-general@lists.sourceforge.net
---
 drivers/spi/spi_mpc8xxx.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/spi/spi_mpc8xxx.c b/drivers/spi/spi_mpc8xxx.c
index e9390d7..b13501a 100644
--- a/drivers/spi/spi_mpc8xxx.c
+++ b/drivers/spi/spi_mpc8xxx.c
@@ -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 ((int)irq <= 0)
 		return -EINVAL;
 
 	master = mpc8xxx_spi_probe(&pdev->dev, mem, irq);
-- 
1.6.5.2