ASoC: omap McBSP: Clear rx_irq at probe time for OMAP4

On OMAP4 we have one interrupt line per McBSP port.
At probe time tx, and rx irq value will be -ENXIO,
and only the tx irq will get corrected.
In omap_mcbsp_request if the rx_irq is not 0 we proceed,
and try to request the interrupt, which will fail on
OMAP4 (rx_irq == -6).
To avoid this error, clear the rx_irq at probe time
on OMAP4.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Jarkko Nikula <jarkko.nikula@bitmer.com>
Signed-off-by: Liam Girdwood <lrg@ti.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/sound/soc/omap/mcbsp.c b/sound/soc/omap/mcbsp.c
index 21dbb0532bca..c3e31deafa07 100644
--- a/sound/soc/omap/mcbsp.c
+++ b/sound/soc/omap/mcbsp.c
@@ -958,8 +958,10 @@ int __devinit omap_mcbsp_init(struct platform_device *pdev)
         mcbsp->rx_irq = platform_get_irq_byname(pdev, "rx");
 
         /* From OMAP4 there will be a single irq line */
-        if (mcbsp->tx_irq == -ENXIO)
+        if (mcbsp->tx_irq == -ENXIO) {
                 mcbsp->tx_irq = platform_get_irq(pdev, 0);
+                mcbsp->rx_irq = 0;
+        }
 
         res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx");
         if (!res) {