linux-kernel - [PATCH 04/23] intel_sst: ignore IRQ when suspended

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Date:	Tue, 03 May 2011 17:32:25 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	greg@...ah.com, linux-kernel@...r.kernel.org
Subject: [PATCH 04/23] intel_sst: ignore IRQ when suspended

From: Vinod Koul <vinod.koul@...el.com>

The irq for audio is shared, so when device is supended driver should
not the read register and ignore the interrupt.

This patch ignores interrupts when device is suspended.

Signed-off-by: Vinod Koul <vinod.koul@...el.com>
Signed-off-by: Ramesh Babu K V <ramesh.babu@...el.com>
Signed-off-by: Alan Cox <alan@...ux.intel.com>
---

 drivers/staging/intel_sst/intel_sst.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)


diff --git a/drivers/staging/intel_sst/intel_sst.c b/drivers/staging/intel_sst/intel_sst.c
index c40e00a..e7c2617 100644
--- a/drivers/staging/intel_sst/intel_sst.c
+++ b/drivers/staging/intel_sst/intel_sst.c
@@ -107,6 +107,9 @@ static irqreturn_t intel_sst_interrupt(int irq, void *context)
 	unsigned int size = 0, str_id;
 	struct stream_info *stream ;
 
+	/* Do not handle interrupt in suspended state */
+	if (drv->sst_state == SST_SUSPENDED)
+		return IRQ_NONE;
 	/* Interrupt arrived, check src */
 	isr.full = sst_shim_read(drv->shim, SST_ISRX);
 

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