diff options
| author | Songjun Wu <songjun.wu@atmel.com> | 2016-01-18 11:14:44 +0100 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2016-01-18 19:07:46 +0530 |
| commit | 611dcadb01c89d1d3521450c05a4ded332e5a32d (patch) | |
| tree | 9109cbbf1c148268fe94ee211d05f455ecf2fb5c | |
| parent | 2895b2cad6e7a95104cf396e5330054453382ae1 (diff) | |
| download | talos-obmc-linux-611dcadb01c89d1d3521450c05a4ded332e5a32d.tar.gz talos-obmc-linux-611dcadb01c89d1d3521450c05a4ded332e5a32d.zip | |
dmaengine: at_xdmac: fix resume for cyclic transfers
When having cyclic transfers, the channel was paused when performing
suspend but was not correctly resumed.
Signed-off-by: Songjun Wu <songjun.wu@atmel.com>
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Fixes: e1f7c9eee707 ("dmaengine: at_xdmac: creation of the atmel
eXtended DMA Controller driver")
Cc: <stable@vger.kernel.org> # 4.1 and later
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| -rw-r--r-- | drivers/dma/at_xdmac.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c index d0ae4613b87e..c21aef74e8d1 100644 --- a/drivers/dma/at_xdmac.c +++ b/drivers/dma/at_xdmac.c @@ -1697,6 +1697,7 @@ static int at_xdmac_device_terminate_all(struct dma_chan *chan) list_for_each_entry_safe(desc, _desc, &atchan->xfers_list, xfer_node) at_xdmac_remove_xfer(atchan, desc); + clear_bit(AT_XDMAC_CHAN_IS_PAUSED, &atchan->status); clear_bit(AT_XDMAC_CHAN_IS_CYCLIC, &atchan->status); spin_unlock_irqrestore(&atchan->lock, flags); @@ -1829,6 +1830,8 @@ static int atmel_xdmac_resume(struct device *dev) atchan = to_at_xdmac_chan(chan); at_xdmac_chan_write(atchan, AT_XDMAC_CC, atchan->save_cc); if (at_xdmac_chan_is_cyclic(atchan)) { + if (at_xdmac_chan_is_paused(atchan)) + at_xdmac_device_resume(chan); at_xdmac_chan_write(atchan, AT_XDMAC_CNDA, atchan->save_cnda); at_xdmac_chan_write(atchan, AT_XDMAC_CNDC, atchan->save_cndc); at_xdmac_chan_write(atchan, AT_XDMAC_CIE, atchan->save_cim); |
