diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2013-01-25 11:48:03 +0200 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2013-01-28 04:04:50 -0800 |
| commit | 4702d5244ca947263e8b7eb2ba6d8721e80c46e2 (patch) | |
| tree | 127c5fdd5590467d781aca04685517e97d02bb01 /drivers/dma/dw_dmac_regs.h | |
| parent | 176dcec50f3f0bc46f11b983c1a3bbc2dd3514fd (diff) | |
dw_dmac: return proper residue value
Currently the driver returns full length of the active descriptor which is
wrong. We have to go throught the active descriptor and substract the length of
each sent children in the chain from the total length along with the actual
data in the DMA channel registers.
The cyclic case is not handled by this patch due to len field in the descriptor
structure is left untouched by the original code.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/dw_dmac_regs.h')
| -rw-r--r-- | drivers/dma/dw_dmac_regs.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/dma/dw_dmac_regs.h b/drivers/dma/dw_dmac_regs.h index 833b4cf9843..88dd8eb3195 100644 --- a/drivers/dma/dw_dmac_regs.h +++ b/drivers/dma/dw_dmac_regs.h @@ -203,6 +203,7 @@ struct dw_dma_chan { struct list_head active_list; struct list_head queue; struct list_head free_list; + u32 residue; struct dw_cyclic_desc *cdesc; unsigned int descs_allocated; |