From 99532559dc7a8e686b2cef14c780a7ad5dbd4a31 Mon Sep 17 00:00:00 2001 From: Nicolas Pitre Date: Fri, 5 May 2006 22:32:24 +0100 Subject: [ARM] 3500/1: fix PXA27x DMA allocation priority Patch from Nicolas Pitre Intel PXA27x developers manual section 5.4.1.1 lists a priority distribution for the DMA channels differently than what the code currently assumes. This patch fixes that. Noticed by Simon Vogl Signed-off-by: Nicolas Pitre Signed-off-by: Russell King --- arch/arm/mach-pxa/dma.c | 17 +++++------------ 1 file changed, 5 insertions(+), 12 deletions(-) (limited to 'arch') diff --git a/arch/arm/mach-pxa/dma.c b/arch/arm/mach-pxa/dma.c index 458112b21e25..7d8c85486c66 100644 --- a/arch/arm/mach-pxa/dma.c +++ b/arch/arm/mach-pxa/dma.c @@ -45,23 +45,16 @@ int pxa_request_dma (char *name, pxa_dma_prio prio, local_irq_save(flags); - /* try grabbing a DMA channel with the requested priority */ - for (i = prio; i < prio + PXA_DMA_NBCH(prio); i++) { - if (!dma_channels[i].name) { - found = 1; - break; - } - } - - if (!found) { - /* requested prio group is full, try hier priorities */ - for (i = prio-1; i >= 0; i--) { + do { + /* try grabbing a DMA channel with the requested priority */ + pxa_for_each_dma_prio (i, prio) { if (!dma_channels[i].name) { found = 1; break; } } - } + /* if requested prio group is full, try a hier priority */ + } while (!found && prio--); if (found) { DCSR(i) = DCSR_STARTINTR|DCSR_ENDINTR|DCSR_BUSERR; -- cgit v1.2.1