From bc4d8b5f9f9dfe155f9e007739a5bb90f79db297 Mon Sep 17 00:00:00 2001 From: Paul Walmsley Date: Fri, 13 Apr 2012 06:34:30 -0600 Subject: [PATCH] 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 --- arch/arm/mach-omap1/lcd_dma.c | 5 ----- arch/arm/plat-omap/dma.c | 13 +++++++++++-- 2 files changed, 11 insertions(+), 7 deletions(-) diff --git a/arch/arm/mach-omap1/lcd_dma.c b/arch/arm/mach-omap1/lcd_dma.c index 86ace9a..9237576 100644 --- a/arch/arm/mach-omap1/lcd_dma.c +++ b/arch/arm/mach-omap1/lcd_dma.c @@ -77,11 +77,6 @@ void omap_set_lcd_dma_b1(unsigned long addr, u16 fb_xres, u16 fb_yres, } EXPORT_SYMBOL(omap_set_lcd_dma_b1); -void omap_set_lcd_dma_src_port(int port) -{ - lcd_dma.src_port = port; -} - void omap_set_lcd_dma_ext_controller(int external) { lcd_dma.ext_ctrl = external; diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c index ecdb3da..612227e 100644 --- a/arch/arm/plat-omap/dma.c +++ b/arch/arm/plat-omap/dma.c @@ -41,6 +41,15 @@ #include +/* + * 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 { -- 2.7.4