lkml.org 
[lkml]   [2011]   [Jan]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 31/32] dma40: stop ongoing transfers in DMA_TERMINATE_ALL
Date
From: Rabin Vincent <rabin.vincent@stericsson.com>

The current implementation of DMA_TERMINATE_ALL leaves ongoing transfers
running. Fix it.

Acked-by: Per Forlin <per.forlin@stericsson.com>
Acked-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
---
drivers/dma/ste_dma40.c | 34 +++++++++++++++++++++-------------
1 files changed, 21 insertions(+), 13 deletions(-)
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 929fd8f..8fd0bb9 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -918,10 +918,8 @@ static bool d40_tx_is_linked(struct d40_chan *d40c)
return is_link;
}

-static int d40_pause(struct dma_chan *chan)
+static int d40_pause(struct d40_chan *d40c)
{
- struct d40_chan *d40c =
- container_of(chan, struct d40_chan, chan);
int res = 0;
unsigned long flags;

@@ -945,10 +943,8 @@ static int d40_pause(struct dma_chan *chan)
return res;
}

-static int d40_resume(struct dma_chan *chan)
+static int d40_resume(struct d40_chan *d40c)
{
- struct d40_chan *d40c =
- container_of(chan, struct d40_chan, chan);
int res = 0;
unsigned long flags;

@@ -978,6 +974,22 @@ no_suspend:
return res;
}

+static int d40_terminate_all(struct d40_chan *chan)
+{
+ unsigned long flags;
+ int ret = 0;
+
+ ret = d40_pause(chan);
+ if (!ret && chan_is_physical(chan))
+ ret = d40_channel_execute_command(chan, D40_DMA_STOP);
+
+ spin_lock_irqsave(&chan->lock, flags);
+ d40_term_all(chan);
+ spin_unlock_irqrestore(&chan->lock, flags);
+
+ return ret;
+}
+
static dma_cookie_t d40_tx_submit(struct dma_async_tx_descriptor *tx)
{
struct d40_chan *d40c = container_of(tx->chan,
@@ -2176,7 +2188,6 @@ static void d40_set_runtime_config(struct dma_chan *chan,
static int d40_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
unsigned long arg)
{
- unsigned long flags;
struct d40_chan *d40c = container_of(chan, struct d40_chan, chan);

if (d40c->phy_chan == NULL) {
@@ -2186,14 +2197,11 @@ static int d40_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,

switch (cmd) {
case DMA_TERMINATE_ALL:
- spin_lock_irqsave(&d40c->lock, flags);
- d40_term_all(d40c);
- spin_unlock_irqrestore(&d40c->lock, flags);
- return 0;
+ return d40_terminate_all(d40c);
case DMA_PAUSE:
- return d40_pause(chan);
+ return d40_pause(d40c);
case DMA_RESUME:
- return d40_resume(chan);
+ return d40_resume(d40c);
case DMA_SLAVE_CONFIG:
d40_set_runtime_config(chan,
(struct dma_slave_config *) arg);
--
1.7.3.2


\
 
 \ /
  Last update: 2011-01-25 11:35    [W:0.131 / U:0.088 seconds]
©2003-2014 Jasper Spaans. Advertise on this site