struct sh_dmae_device::chan_reg is a pointer to u32, therefore when adding offsets to it care should be taken to add offsets in sizeof(u32) units, not in bytes. This patch corrects such a bug. While at it we also remove the redundant parameter of the affected function.
Signed-off-by: Guennadi Liakhovetski <[email protected]> --- This is a theoretical fix, I don't have a test-case for it, but the original calculation does seem to be buggy to me. Reviews and tests are welcome. drivers/dma/sh/shdma.c | 8 ++++---- 1 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/dma/sh/shdma.c b/drivers/dma/sh/shdma.c index 98b2693..c7950be 100644 --- a/drivers/dma/sh/shdma.c +++ b/drivers/dma/sh/shdma.c @@ -51,12 +51,12 @@ static DEFINE_SPINLOCK(sh_dmae_lock); static LIST_HEAD(sh_dmae_devices); -static void chclr_write(struct sh_dmae_chan *sh_dc, u32 data) +static void channel_clear(struct sh_dmae_chan *sh_dc) { struct sh_dmae_device *shdev = to_sh_dev(sh_dc); - __raw_writel(data, shdev->chan_reg + - shdev->pdata->channel[sh_dc->shdma_chan.id].chclr_offset); + __raw_writel(0, shdev->chan_reg + + shdev->pdata->channel[sh_dc->shdma_chan.id].chclr_offset / sizeof(u32)); } static void sh_dmae_writel(struct sh_dmae_chan *sh_dc, u32 data, u32 reg) @@ -135,7 +135,7 @@ static int sh_dmae_rst(struct sh_dmae_device *shdev) for (i = 0; i < shdev->pdata->channel_num; i++) { struct sh_dmae_chan *sh_chan = shdev->chan[i]; if (sh_chan) - chclr_write(sh_chan, 0); + channel_clear(sh_chan); } } -- 1.7.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
