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| author | Paul Walmsley <paul@pwsan.com> | 2012-04-13 06:34:30 -0600 |
|---|---|---|
| committer | Paul Walmsley <paul@pwsan.com> | 2012-04-13 06:34:30 -0600 |
| commit | bc4d8b5f9f9dfe155f9e007739a5bb90f79db297 (patch) | |
| tree | dfb661f213783704ae3e3eb1bcffdb00aec89fd6 /arch/arm/plat-omap/dma.c | |
| parent | 7cc0442cf2c2cc0efd117051d20e531f7cb2d604 (diff) | |
| download | linux-bc4d8b5f9f9dfe155f9e007739a5bb90f79db297.tar.bz2 | |
ARM: OMAP: DMA: use constant array maximum, drop some LCD DMA code
gcc can apparently handle stack-allocated arrays that use a dynamic
variable as the array maximum. Rather than using a mutable quantity,
simply use a constant maximum possible size. To me, code clarity is
improved; and it also avoids the following sparse warnings:
arch/arm/plat-omap/dma.c:886:40: error: bad constant expression
arch/arm/plat-omap/dma.c:892:17: error: cannot size expression
arch/arm/plat-omap/dma.c:970:40: error: bad constant expression
arch/arm/plat-omap/dma.c:972:17: error: cannot size expression
Also drop some dead code from the OMAP1 LCD DMA code:
arch/arm/mach-omap1/lcd_dma.c:80:6: warning: symbol 'omap_set_lcd_dma_src_port' was not declared. Should it be static?
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Diffstat (limited to 'arch/arm/plat-omap/dma.c')
| -rw-r--r-- | arch/arm/plat-omap/dma.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c index ecdb3da0dea9..612227efe34f 100644 --- a/arch/arm/plat-omap/dma.c +++ b/arch/arm/plat-omap/dma.c @@ -41,6 +41,15 @@ #include <plat/tc.h> +/* + * MAX_LOGICAL_DMA_CH_COUNT: the maximum number of logical DMA + * channels that an instance of the SDMA IP block can support. Used + * to size arrays. (The actual maximum on a particular SoC may be less + * than this -- for example, OMAP1 SDMA instances only support 17 logical + * DMA channels.) + */ +#define MAX_LOGICAL_DMA_CH_COUNT 32 + #undef DEBUG #ifndef CONFIG_ARCH_OMAP1 @@ -883,7 +892,7 @@ void omap_start_dma(int lch) if (!omap_dma_in_1510_mode() && dma_chan[lch].next_lch != -1) { int next_lch, cur_lch; - char dma_chan_link_map[dma_lch_count]; + char dma_chan_link_map[MAX_LOGICAL_DMA_CH_COUNT]; dma_chan_link_map[lch] = 1; /* Set the link register of the first channel */ @@ -967,7 +976,7 @@ void omap_stop_dma(int lch) if (!omap_dma_in_1510_mode() && dma_chan[lch].next_lch != -1) { int next_lch, cur_lch = lch; - char dma_chan_link_map[dma_lch_count]; + char dma_chan_link_map[MAX_LOGICAL_DMA_CH_COUNT]; memset(dma_chan_link_map, 0, sizeof(dma_chan_link_map)); do { |