sdhci-bcm2708: speed up DMA sync

grigorig · grigorig · commit d64b84ca8c17 · 2012-06-11T19:03:22.000+02:00
Experiments show that it doesn't really take that long to sync, so we
can reduce the poll interval slightly. Might improve performance a bit.
diff --git a/drivers/mmc/host/sdhci-bcm2708.c b/drivers/mmc/host/sdhci-bcm2708.c
@@ -907,7 +907,7 @@ static void sdhci_bcm2708_dma_complete_irq(struct sdhci_host *host,
 		while (0 != (sdhci_bcm2708_raw_readl(host, SDHCI_PRESENT_STATE) 
 			& state_mask) && --timeout > 0)
 		{
-			udelay(100);
+			udelay(30);
 			continue;
 		}
 		if (timeout <= 0)

Original file line number	Diff line number	Diff line change
`@@ -907,7 +907,7 @@ static void sdhci_bcm2708_dma_complete_irq(struct sdhci_host *host,`
`907`	`907`	`while (0 != (sdhci_bcm2708_raw_readl(host, SDHCI_PRESENT_STATE)`
`908`	`908`	`& state_mask) && --timeout > 0)`
`909`	`909`	`{`
`910`		`- udelay(100);`
	`910`	`+ udelay(30);`
`911`	`911`	`continue;`
`912`	`912`	`}`
`913`	`913`	`if (timeout <= 0)`