From: Stephen Rothwell <sfr@canb.auug.org.au>
Date: Tue, 13 Sep 2016 02:39:35 +0000 (+1000)
Subject: Merge remote-tracking branch 'tty/tty-next'
X-Git-Url: http://git.efficios.com/?p=deliverable%2Flinux.git;a=commitdiff_plain;h=9a937a382b985c14ca9939e8adbf6160d0c56c19

Merge remote-tracking branch 'tty/tty-next'
---

9a937a382b985c14ca9939e8adbf6160d0c56c19
diff --cc drivers/dma/imx-sdma.c
index a6bffbc47ee2,3cb47386fbb9..b9629b2bfc05
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@@ -689,12 -664,36 +686,35 @@@ static void sdma_update_channel_loop(st
  		if (bd->mode.status & BD_DONE)
  			break;
  
- 		if (bd->mode.status & BD_RROR)
+ 		if (bd->mode.status & BD_RROR) {
+ 			bd->mode.status &= ~BD_RROR;
  			sdmac->status = DMA_ERROR;
+ 			error = -EIO;
+ 		}
  
+ 	       /*
+ 		* We use bd->mode.count to calculate the residue, since contains
+ 		* the number of bytes present in the current buffer descriptor.
+ 		*/
+ 
+ 		sdmac->chn_real_count = bd->mode.count;
  		bd->mode.status |= BD_DONE;
+ 		bd->mode.count = sdmac->period_len;
+ 
+ 		/*
+ 		 * The callback is called from the interrupt context in order
+ 		 * to reduce latency and to avoid the risk of altering the
+ 		 * SDMA transaction status by the time the client tasklet is
+ 		 * executed.
+ 		 */
+ 
 -		if (sdmac->desc.callback)
 -			sdmac->desc.callback(sdmac->desc.callback_param);
++		dmaengine_desc_get_callback_invoke(&sdmac->desc, NULL);
+ 
  		sdmac->buf_tail++;
  		sdmac->buf_tail %= sdmac->num_bd;
+ 
+ 		if (error)
+ 			sdmac->status = old_status;
  	}
  }
  
@@@ -722,20 -722,10 +743,10 @@@ static void mxc_sdma_handle_channel_nor
  		sdmac->status = DMA_COMPLETE;
  
  	dma_cookie_complete(&sdmac->desc);
 -	if (sdmac->desc.callback)
 -		sdmac->desc.callback(sdmac->desc.callback_param);
 +
 +	dmaengine_desc_get_callback_invoke(&sdmac->desc, NULL);
  }
  
- static void sdma_tasklet(unsigned long data)
- {
- 	struct sdma_channel *sdmac = (struct sdma_channel *) data;
- 
- 	if (sdmac->flags & IMX_DMA_SG_LOOP)
- 		sdma_handle_channel_loop(sdmac);
- 	else
- 		mxc_sdma_handle_channel_normal(sdmac);
- }
- 
  static irqreturn_t sdma_int_handler(int irq, void *dev_id)
  {
  	struct sdma_engine *sdma = dev_id;