[PATCH v2 4/4] dsp-bridge: wait less and check the mailbox more

[Felipe Contreras <felipe.contreras@gmail.com>]

From: Felipe Contreras <felipe.contreras@nokia.com>

Profiling showed the __delay function is called a lot; checking the mbox
more often seems to decrease the usage by 2/3's according to OProfile.

The changes are based on 'arch/arm/plat-omap/mailbox.c'. Tested on OMAP3430.

Signed-off-by: Felipe Contreras <felipe.contreras@nokia.com>
---
 drivers/dsp/bridge/wmd/tiomap_sm.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/dsp/bridge/wmd/tiomap_sm.c b/drivers/dsp/bridge/wmd/tiomap_sm.c
index 4ad893b..03d9195 100644
--- a/drivers/dsp/bridge/wmd/tiomap_sm.c
+++ b/drivers/dsp/bridge/wmd/tiomap_sm.c
@@ -179,7 +179,7 @@ DSP_STATUS CHNLSM_InterruptDSP(struct WMD_DEV_CONTEXT *hDevContext)
 #endif
 	HW_STATUS hwStatus;
 	struct CFG_HOSTRES resources;
-	u16 cnt = 10;
+	u16 cnt = 1000;
 	u32 temp;
 	/* We are waiting indefinitely here. This needs to be fixed in the
 	 * second phase */
@@ -222,7 +222,7 @@ DSP_STATUS CHNLSM_InterruptDSP(struct WMD_DEV_CONTEXT *hDevContext)
 	while (--cnt) {
 		if (!fifo_full((void __iomem *) resources.dwMboxBase, 0))
 			break;
-		mdelay(1);
+		udelay(1);
 	}
 	if (!cnt) {
 		DBG_Trace(DBG_LEVEL7, "Timed out waiting for DSP mailbox \n");
-- 
1.6.1.3