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[ARM] 5122/1: imx_dma_request_by_prio simpilfication

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imx_dma_request_by_prio can return channel number by itself.
No need to supply variable address through parameters.

Also converted all drivers using this function.

Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Paulius Zaleckas
2008-06-25 13:25:13 +01:00
committed by Russell King
parent 60a752ef34
commit f7def13ed0
4 changed files with 15 additions and 20 deletions
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13
arch/arm/mach-imx/dma.c
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@ -410,7 +410,6 @@ void imx_dma_free(imx_dmach_t dma_ch)
/**
* imx_dma_request_by_prio - find and request some of free channels best suiting requested priority
* @dma_ch: i.MX DMA channel number
* @name: the driver/caller own non-%NULL identification
* @prio: one of the hardware distinguished priority level:
* %DMA_PRIO_HIGH, %DMA_PRIO_MEDIUM, %DMA_PRIO_LOW
@ -420,11 +419,9 @@ void imx_dma_free(imx_dmach_t dma_ch)
* in the higher and then even lower priority groups.
*
* Return value: If there is no free channel to allocate, -%ENODEV is returned.
* Zero value indicates successful channel allocation.
* On successful allocation channel is returned.
*/
int
imx_dma_request_by_prio(imx_dmach_t * pdma_ch, const char *name,
imx_dma_prio prio)
imx_dmach_t imx_dma_request_by_prio(const char *name, imx_dma_prio prio)
{
int i;
int best;
@ -444,15 +441,13 @@ imx_dma_request_by_prio(imx_dmach_t * pdma_ch, const char *name,
for (i = best; i < IMX_DMA_CHANNELS; i++) {
if (!imx_dma_request(i, name)) {
*pdma_ch = i;
return 0;
return i;
}
}
for (i = best - 1; i >= 0; i--) {
if (!imx_dma_request(i, name)) {
*pdma_ch = i;
return 0;
return i;
}
}