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authorTomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com>2011-10-11 16:43:21 +0400
committerVinod Koul <vinod.koul@linux.intel.com>2011-10-11 20:54:36 +0400
commitc43f1508686e8e4746012bf87995085eeb0f5307 (patch)
tree22b243bb93d07b2107c72671dbd60ee3bdf59886 /drivers/dma/pch_dma.c
parentf80befe081576219379debf6611f02c9f3b01c41 (diff)
downloadlinux-c43f1508686e8e4746012bf87995085eeb0f5307.tar.xz
pch_dma: Fix suspend issue
Currently, executing suspend/hibernation, memory access violation occurs. In pch_dma_save_regs() called by suspend(), you can see the following code. static void pch_dma_save_regs(struct pch_dma *pd) { snip... list_for_each_entry_safe(chan, _c, &pd->dma.channels, device_node) { pd_chan = to_pd_chan(chan); pd->ch_regs[i].dev_addr = channel_readl(pd_chan, DEV_ADDR); pd->ch_regs[i].mem_addr = channel_readl(pd_chan, MEM_ADDR); pd->ch_regs[i].size = channel_readl(pd_chan, SIZE); pd->ch_regs[i].next = channel_readl(pd_chan, NEXT); i++; } } Max loop count is 12 defined at pci_table. So, this caused memory access violation. This patch fixes the issue - Modify array size (MAX_CHAN_NR) Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Diffstat (limited to 'drivers/dma/pch_dma.c')
-rw-r--r--drivers/dma/pch_dma.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma/pch_dma.c b/drivers/dma/pch_dma.c
index 5b65362024fd..6abe5ac3bd5e 100644
--- a/drivers/dma/pch_dma.c
+++ b/drivers/dma/pch_dma.c
@@ -60,7 +60,7 @@
#define DMA_DESC_FOLLOW_WITHOUT_IRQ 0x2
#define DMA_DESC_FOLLOW_WITH_IRQ 0x3
-#define MAX_CHAN_NR 8
+#define MAX_CHAN_NR 12
#define DMA_MASK_CTL0_MODE 0x33333333
#define DMA_MASK_CTL2_MODE 0x00003333