* [PATCH/RFC] dma: shdma: transfer based runtime PM
@ 2011-06-01 7:20 Guennadi Liakhovetski
2011-06-01 8:14 ` Koul, Vinod
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: Guennadi Liakhovetski @ 2011-06-01 7:20 UTC (permalink / raw)
To: linux-sh
Currently the shdma dmaengine driver uses runtime PM to save power, when
no channel on the specific controller is requested by a user. This patch
switches the driver to count individual DMA transfers. That way the
controller can be powered down between transfers, even if some of its
channels are in use.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
---
I marked this an RFC, because it might make sense to first test it with
Rafael's upcoming power-domain code for sh-mobile, before committing.
drivers/dma/shdma.c | 28 ++++++++++++++++------------
1 files changed, 16 insertions(+), 12 deletions(-)
diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c
index 6eb8454..94d78f2 100644
--- a/drivers/dma/shdma.c
+++ b/drivers/dma/shdma.c
@@ -235,10 +235,22 @@ static dma_cookie_t sh_dmae_tx_submit(struct dma_async_tx_descriptor *tx)
struct sh_desc *desc = tx_to_sh_desc(tx), *chunk, *last = desc, *c;
struct sh_dmae_chan *sh_chan = to_sh_chan(tx->chan);
dma_async_tx_callback callback = tx->callback;
+ struct sh_dmae_slave *param = tx->chan->private;
dma_cookie_t cookie;
+ pm_runtime_get_sync(sh_chan->dev);
+
spin_lock_bh(&sh_chan->desc_lock);
+ if (param) {
+ const struct sh_dmae_slave_config *cfg = param->config;
+
+ dmae_set_dmars(sh_chan, cfg->mid_rid);
+ dmae_set_chcr(sh_chan, cfg->chcr);
+ } else {
+ dmae_init(sh_chan);
+ }
+
cookie = sh_chan->common.cookie;
cookie++;
if (cookie < 0)
@@ -319,8 +331,6 @@ static int sh_dmae_alloc_chan_resources(struct dma_chan *chan)
struct sh_dmae_slave *param = chan->private;
int ret;
- pm_runtime_get_sync(sh_chan->dev);
-
/*
* This relies on the guarantee from dmaengine that alloc_chan_resources
* never runs concurrently with itself or free_chan_resources.
@@ -340,11 +350,6 @@ static int sh_dmae_alloc_chan_resources(struct dma_chan *chan)
}
param->config = cfg;
-
- dmae_set_dmars(sh_chan, cfg->mid_rid);
- dmae_set_chcr(sh_chan, cfg->chcr);
- } else {
- dmae_init(sh_chan);
}
spin_lock_bh(&sh_chan->desc_lock);
@@ -378,7 +383,6 @@ edescalloc:
clear_bit(param->slave_id, sh_dmae_slave_used);
etestused:
efindslave:
- pm_runtime_put(sh_chan->dev);
return ret;
}
@@ -390,7 +394,6 @@ static void sh_dmae_free_chan_resources(struct dma_chan *chan)
struct sh_dmae_chan *sh_chan = to_sh_chan(chan);
struct sh_desc *desc, *_desc;
LIST_HEAD(list);
- int descs = sh_chan->descs_allocated;
/* Protect against ISR */
spin_lock_irq(&sh_chan->desc_lock);
@@ -417,9 +420,6 @@ static void sh_dmae_free_chan_resources(struct dma_chan *chan)
spin_unlock_bh(&sh_chan->desc_lock);
- if (descs > 0)
- pm_runtime_put(sh_chan->dev);
-
list_for_each_entry_safe(desc, _desc, &list, node)
kfree(desc);
}
@@ -735,6 +735,9 @@ static dma_async_tx_callback __ld_cleanup(struct sh_dmae_chan *sh_chan, bool all
async_tx_test_ack(&desc->async_tx)) || all) {
/* Remove from ld_queue list */
desc->mark = DESC_IDLE;
+
+ if (tx->cookie > 0)
+ pm_runtime_put(sh_chan->dev);
list_move(&desc->node, &sh_chan->ld_free);
}
}
@@ -894,6 +897,7 @@ static bool sh_dmae_reset(struct sh_dmae_device *shdev)
desc->mark = DESC_IDLE;
if (tx->callback)
tx->callback(tx->callback_param);
+ pm_runtime_put(sh_chan->dev);
}
spin_lock(&sh_chan->desc_lock);
--
1.7.2.5
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH/RFC] dma: shdma: transfer based runtime PM
2011-06-01 7:20 [PATCH/RFC] dma: shdma: transfer based runtime PM Guennadi Liakhovetski
@ 2011-06-01 8:14 ` Koul, Vinod
2011-07-07 13:24 ` Guennadi Liakhovetski
2011-06-24 8:55 ` Paul Mundt
2011-06-24 9:04 ` Guennadi Liakhovetski
2 siblings, 1 reply; 6+ messages in thread
From: Koul, Vinod @ 2011-06-01 8:14 UTC (permalink / raw)
To: linux-sh
On Wed, 2011-06-01 at 12:50 +0530, Guennadi Liakhovetski wrote:
> Currently the shdma dmaengine driver uses runtime PM to save power, when
> no channel on the specific controller is requested by a user. This patch
> switches the driver to count individual DMA transfers. That way the
> controller can be powered down between transfers, even if some of its
> channels are in use.
>
> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
> ---
>
> I marked this an RFC, because it might make sense to first test it with
> Rafael's upcoming power-domain code for sh-mobile, before committing.
>
> drivers/dma/shdma.c | 28 ++++++++++++++++------------
> 1 files changed, 16 insertions(+), 12 deletions(-)
You should be sending this to LKML as well...
>
> diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c
> index 6eb8454..94d78f2 100644
> --- a/drivers/dma/shdma.c
> +++ b/drivers/dma/shdma.c
> @@ -235,10 +235,22 @@ static dma_cookie_t sh_dmae_tx_submit(struct dma_async_tx_descriptor *tx)
> struct sh_desc *desc = tx_to_sh_desc(tx), *chunk, *last = desc, *c;
> struct sh_dmae_chan *sh_chan = to_sh_chan(tx->chan);
> dma_async_tx_callback callback = tx->callback;
> + struct sh_dmae_slave *param = tx->chan->private;
> dma_cookie_t cookie;
>
> + pm_runtime_get_sync(sh_chan->dev);
This should be done in issue_pending where the descriptor is supposed to
be submitted. See Documentation/dmaengine.txt
> +
> spin_lock_bh(&sh_chan->desc_lock);
>
> + if (param) {
> + const struct sh_dmae_slave_config *cfg = param->config;
> +
> + dmae_set_dmars(sh_chan, cfg->mid_rid);
> + dmae_set_chcr(sh_chan, cfg->chcr);
> + } else {
> + dmae_init(sh_chan);
> + }
> +
> cookie = sh_chan->common.cookie;
> cookie++;
> if (cookie < 0)
> @@ -319,8 +331,6 @@ static int sh_dmae_alloc_chan_resources(struct dma_chan *chan)
> struct sh_dmae_slave *param = chan->private;
> int ret;
>
> - pm_runtime_get_sync(sh_chan->dev);
> -
> /*
> * This relies on the guarantee from dmaengine that alloc_chan_resources
> * never runs concurrently with itself or free_chan_resources.
> @@ -340,11 +350,6 @@ static int sh_dmae_alloc_chan_resources(struct dma_chan *chan)
> }
>
> param->config = cfg;
> -
> - dmae_set_dmars(sh_chan, cfg->mid_rid);
> - dmae_set_chcr(sh_chan, cfg->chcr);
> - } else {
> - dmae_init(sh_chan);
> }
>
> spin_lock_bh(&sh_chan->desc_lock);
> @@ -378,7 +383,6 @@ edescalloc:
> clear_bit(param->slave_id, sh_dmae_slave_used);
> etestused:
> efindslave:
> - pm_runtime_put(sh_chan->dev);
> return ret;
> }
>
> @@ -390,7 +394,6 @@ static void sh_dmae_free_chan_resources(struct dma_chan *chan)
> struct sh_dmae_chan *sh_chan = to_sh_chan(chan);
> struct sh_desc *desc, *_desc;
> LIST_HEAD(list);
> - int descs = sh_chan->descs_allocated;
>
> /* Protect against ISR */
> spin_lock_irq(&sh_chan->desc_lock);
> @@ -417,9 +420,6 @@ static void sh_dmae_free_chan_resources(struct dma_chan *chan)
>
> spin_unlock_bh(&sh_chan->desc_lock);
>
> - if (descs > 0)
> - pm_runtime_put(sh_chan->dev);
> -
> list_for_each_entry_safe(desc, _desc, &list, node)
> kfree(desc);
> }
> @@ -735,6 +735,9 @@ static dma_async_tx_callback __ld_cleanup(struct sh_dmae_chan *sh_chan, bool all
> async_tx_test_ack(&desc->async_tx)) || all) {
> /* Remove from ld_queue list */
> desc->mark = DESC_IDLE;
> +
> + if (tx->cookie > 0)
> + pm_runtime_put(sh_chan->dev);
> list_move(&desc->node, &sh_chan->ld_free);
> }
> }
> @@ -894,6 +897,7 @@ static bool sh_dmae_reset(struct sh_dmae_device *shdev)
> desc->mark = DESC_IDLE;
> if (tx->callback)
> tx->callback(tx->callback_param);
> + pm_runtime_put(sh_chan->dev);
> }
>
> spin_lock(&sh_chan->desc_lock);
--
~Vinod
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH/RFC] dma: shdma: transfer based runtime PM
2011-06-01 7:20 [PATCH/RFC] dma: shdma: transfer based runtime PM Guennadi Liakhovetski
2011-06-01 8:14 ` Koul, Vinod
@ 2011-06-24 8:55 ` Paul Mundt
2011-06-24 9:04 ` Guennadi Liakhovetski
2 siblings, 0 replies; 6+ messages in thread
From: Paul Mundt @ 2011-06-24 8:55 UTC (permalink / raw)
To: linux-sh
On Wed, Jun 01, 2011 at 09:20:34AM +0200, Guennadi Liakhovetski wrote:
> Currently the shdma dmaengine driver uses runtime PM to save power, when
> no channel on the specific controller is requested by a user. This patch
> switches the driver to count individual DMA transfers. That way the
> controller can be powered down between transfers, even if some of its
> channels are in use.
>
> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
> ---
>
> I marked this an RFC, because it might make sense to first test it with
> Rafael's upcoming power-domain code for sh-mobile, before committing.
>
Any updates on this?
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH/RFC] dma: shdma: transfer based runtime PM
2011-06-01 7:20 [PATCH/RFC] dma: shdma: transfer based runtime PM Guennadi Liakhovetski
2011-06-01 8:14 ` Koul, Vinod
2011-06-24 8:55 ` Paul Mundt
@ 2011-06-24 9:04 ` Guennadi Liakhovetski
2 siblings, 0 replies; 6+ messages in thread
From: Guennadi Liakhovetski @ 2011-06-24 9:04 UTC (permalink / raw)
To: linux-sh
On Fri, 24 Jun 2011, Paul Mundt wrote:
> On Wed, Jun 01, 2011 at 09:20:34AM +0200, Guennadi Liakhovetski wrote:
> > Currently the shdma dmaengine driver uses runtime PM to save power, when
> > no channel on the specific controller is requested by a user. This patch
> > switches the driver to count individual DMA transfers. That way the
> > controller can be powered down between transfers, even if some of its
> > channels are in use.
> >
> > Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
> > ---
> >
> > I marked this an RFC, because it might make sense to first test it with
> > Rafael's upcoming power-domain code for sh-mobile, before committing.
> >
> Any updates on this?
No, not yet. Still waiting for Rafael's code to appear in "next."
Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH/RFC] dma: shdma: transfer based runtime PM
2011-06-01 8:14 ` Koul, Vinod
@ 2011-07-07 13:24 ` Guennadi Liakhovetski
2011-07-07 13:53 ` Koul, Vinod
0 siblings, 1 reply; 6+ messages in thread
From: Guennadi Liakhovetski @ 2011-07-07 13:24 UTC (permalink / raw)
To: Koul, Vinod
Cc: linux-sh@vger.kernel.org, Williams, Dan J, Rafael J. Wysocki,
linux-kernel
Hi Vinod
On Wed, 1 Jun 2011, Koul, Vinod wrote:
> On Wed, 2011-06-01 at 12:50 +0530, Guennadi Liakhovetski wrote:
> > Currently the shdma dmaengine driver uses runtime PM to save power, when
> > no channel on the specific controller is requested by a user. This patch
> > switches the driver to count individual DMA transfers. That way the
> > controller can be powered down between transfers, even if some of its
> > channels are in use.
> >
> > Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
> > ---
> >
> > I marked this an RFC, because it might make sense to first test it with
> > Rafael's upcoming power-domain code for sh-mobile, before committing.
> >
> > drivers/dma/shdma.c | 28 ++++++++++++++++------------
> > 1 files changed, 16 insertions(+), 12 deletions(-)
> You should be sending this to LKML as well...
added
> > diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c
> > index 6eb8454..94d78f2 100644
> > --- a/drivers/dma/shdma.c
> > +++ b/drivers/dma/shdma.c
> > @@ -235,10 +235,22 @@ static dma_cookie_t sh_dmae_tx_submit(struct dma_async_tx_descriptor *tx)
> > struct sh_desc *desc = tx_to_sh_desc(tx), *chunk, *last = desc, *c;
> > struct sh_dmae_chan *sh_chan = to_sh_chan(tx->chan);
> > dma_async_tx_callback callback = tx->callback;
> > + struct sh_dmae_slave *param = tx->chan->private;
> > dma_cookie_t cookie;
> >
> > + pm_runtime_get_sync(sh_chan->dev);
> This should be done in issue_pending where the descriptor is supposed to
> be submitted. See Documentation/dmaengine.txt
So, you're saying, that drivers' .device_issue_pending() method is allowed
to sleep? But in dma_issue_pending_all() it is called under a
rcu_read_(un)lock(), so, sleeping there doesn't seem like a good idea to
me?
Thanks
Guennadi
> > +
> > spin_lock_bh(&sh_chan->desc_lock);
> >
> > + if (param) {
> > + const struct sh_dmae_slave_config *cfg = param->config;
> > +
> > + dmae_set_dmars(sh_chan, cfg->mid_rid);
> > + dmae_set_chcr(sh_chan, cfg->chcr);
> > + } else {
> > + dmae_init(sh_chan);
> > + }
> > +
> > cookie = sh_chan->common.cookie;
> > cookie++;
> > if (cookie < 0)
> > @@ -319,8 +331,6 @@ static int sh_dmae_alloc_chan_resources(struct dma_chan *chan)
> > struct sh_dmae_slave *param = chan->private;
> > int ret;
> >
> > - pm_runtime_get_sync(sh_chan->dev);
> > -
> > /*
> > * This relies on the guarantee from dmaengine that alloc_chan_resources
> > * never runs concurrently with itself or free_chan_resources.
> > @@ -340,11 +350,6 @@ static int sh_dmae_alloc_chan_resources(struct dma_chan *chan)
> > }
> >
> > param->config = cfg;
> > -
> > - dmae_set_dmars(sh_chan, cfg->mid_rid);
> > - dmae_set_chcr(sh_chan, cfg->chcr);
> > - } else {
> > - dmae_init(sh_chan);
> > }
> >
> > spin_lock_bh(&sh_chan->desc_lock);
> > @@ -378,7 +383,6 @@ edescalloc:
> > clear_bit(param->slave_id, sh_dmae_slave_used);
> > etestused:
> > efindslave:
> > - pm_runtime_put(sh_chan->dev);
> > return ret;
> > }
> >
> > @@ -390,7 +394,6 @@ static void sh_dmae_free_chan_resources(struct dma_chan *chan)
> > struct sh_dmae_chan *sh_chan = to_sh_chan(chan);
> > struct sh_desc *desc, *_desc;
> > LIST_HEAD(list);
> > - int descs = sh_chan->descs_allocated;
> >
> > /* Protect against ISR */
> > spin_lock_irq(&sh_chan->desc_lock);
> > @@ -417,9 +420,6 @@ static void sh_dmae_free_chan_resources(struct dma_chan *chan)
> >
> > spin_unlock_bh(&sh_chan->desc_lock);
> >
> > - if (descs > 0)
> > - pm_runtime_put(sh_chan->dev);
> > -
> > list_for_each_entry_safe(desc, _desc, &list, node)
> > kfree(desc);
> > }
> > @@ -735,6 +735,9 @@ static dma_async_tx_callback __ld_cleanup(struct sh_dmae_chan *sh_chan, bool all
> > async_tx_test_ack(&desc->async_tx)) || all) {
> > /* Remove from ld_queue list */
> > desc->mark = DESC_IDLE;
> > +
> > + if (tx->cookie > 0)
> > + pm_runtime_put(sh_chan->dev);
> > list_move(&desc->node, &sh_chan->ld_free);
> > }
> > }
> > @@ -894,6 +897,7 @@ static bool sh_dmae_reset(struct sh_dmae_device *shdev)
> > desc->mark = DESC_IDLE;
> > if (tx->callback)
> > tx->callback(tx->callback_param);
> > + pm_runtime_put(sh_chan->dev);
> > }
> >
> > spin_lock(&sh_chan->desc_lock);
>
>
> --
> ~Vinod
>
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
^ permalink raw reply [flat|nested] 6+ messages in thread
* RE: [PATCH/RFC] dma: shdma: transfer based runtime PM
2011-07-07 13:24 ` Guennadi Liakhovetski
@ 2011-07-07 13:53 ` Koul, Vinod
0 siblings, 0 replies; 6+ messages in thread
From: Koul, Vinod @ 2011-07-07 13:53 UTC (permalink / raw)
To: Guennadi Liakhovetski
Cc: linux-sh@vger.kernel.org, Williams, Dan J, Rafael J. Wysocki,
linux-kernel@vger.kernel.org
> > On Wed, 2011-06-01 at 12:50 +0530, Guennadi Liakhovetski wrote:
> > > Currently the shdma dmaengine driver uses runtime PM to save power, when
> > > no channel on the specific controller is requested by a user. This patch
> > > switches the driver to count individual DMA transfers. That way the
> > > controller can be powered down between transfers, even if some of its
> > > channels are in use.
> > >
> > > Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
> > > ---
> > >
> > > I marked this an RFC, because it might make sense to first test it with
> > > Rafael's upcoming power-domain code for sh-mobile, before committing.
> > >
> > > drivers/dma/shdma.c | 28 ++++++++++++++++------------
> > > 1 files changed, 16 insertions(+), 12 deletions(-)
> > You should be sending this to LKML as well...
>
> added
>
> > > diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c
> > > index 6eb8454..94d78f2 100644
> > > --- a/drivers/dma/shdma.c
> > > +++ b/drivers/dma/shdma.c
> > > @@ -235,10 +235,22 @@ static dma_cookie_t sh_dmae_tx_submit(struct
> dma_async_tx_descriptor *tx)
> > > struct sh_desc *desc = tx_to_sh_desc(tx), *chunk, *last = desc, *c;
> > > struct sh_dmae_chan *sh_chan = to_sh_chan(tx->chan);
> > > dma_async_tx_callback callback = tx->callback;
> > > + struct sh_dmae_slave *param = tx->chan->private;
> > > dma_cookie_t cookie;
> > >
> > > + pm_runtime_get_sync(sh_chan->dev);
> > This should be done in issue_pending where the descriptor is supposed to
> > be submitted. See Documentation/dmaengine.txt
>
> So, you're saying, that drivers' .device_issue_pending() method is allowed
> to sleep? But in dma_issue_pending_all() it is called under a
> rcu_read_(un)lock(), so, sleeping there doesn't seem like a good idea to
> me?
Yes agreed, if you are issuing from the non sleeping context, it makes sense
to have it here. I was only concerned that typically h/w should be woken up
when we want it to start, which is issue_pending.
>
> Thanks
> Guennadi
>
> > > +
> > > spin_lock_bh(&sh_chan->desc_lock);
> > >
> > > + if (param) {
> > > + const struct sh_dmae_slave_config *cfg = param->config;
> > > +
> > > + dmae_set_dmars(sh_chan, cfg->mid_rid);
> > > + dmae_set_chcr(sh_chan, cfg->chcr);
> > > + } else {
> > > + dmae_init(sh_chan);
> > > + }
> > > +
> > > cookie = sh_chan->common.cookie;
> > > cookie++;
> > > if (cookie < 0)
> > > @@ -319,8 +331,6 @@ static int sh_dmae_alloc_chan_resources(struct dma_chan
> *chan)
> > > struct sh_dmae_slave *param = chan->private;
> > > int ret;
> > >
> > > - pm_runtime_get_sync(sh_chan->dev);
> > > -
> > > /*
> > > * This relies on the guarantee from dmaengine that alloc_chan_resources
> > > * never runs concurrently with itself or free_chan_resources.
> > > @@ -340,11 +350,6 @@ static int sh_dmae_alloc_chan_resources(struct
> dma_chan *chan)
> > > }
> > >
> > > param->config = cfg;
> > > -
> > > - dmae_set_dmars(sh_chan, cfg->mid_rid);
> > > - dmae_set_chcr(sh_chan, cfg->chcr);
> > > - } else {
> > > - dmae_init(sh_chan);
> > > }
> > >
> > > spin_lock_bh(&sh_chan->desc_lock);
> > > @@ -378,7 +383,6 @@ edescalloc:
> > > clear_bit(param->slave_id, sh_dmae_slave_used);
> > > etestused:
> > > efindslave:
> > > - pm_runtime_put(sh_chan->dev);
> > > return ret;
> > > }
> > >
> > > @@ -390,7 +394,6 @@ static void sh_dmae_free_chan_resources(struct dma_chan
> *chan)
> > > struct sh_dmae_chan *sh_chan = to_sh_chan(chan);
> > > struct sh_desc *desc, *_desc;
> > > LIST_HEAD(list);
> > > - int descs = sh_chan->descs_allocated;
> > >
> > > /* Protect against ISR */
> > > spin_lock_irq(&sh_chan->desc_lock);
> > > @@ -417,9 +420,6 @@ static void sh_dmae_free_chan_resources(struct dma_chan
> *chan)
> > >
> > > spin_unlock_bh(&sh_chan->desc_lock);
> > >
> > > - if (descs > 0)
> > > - pm_runtime_put(sh_chan->dev);
> > > -
> > > list_for_each_entry_safe(desc, _desc, &list, node)
> > > kfree(desc);
> > > }
> > > @@ -735,6 +735,9 @@ static dma_async_tx_callback __ld_cleanup(struct
> sh_dmae_chan *sh_chan, bool all
> > > async_tx_test_ack(&desc->async_tx)) || all) {
> > > /* Remove from ld_queue list */
> > > desc->mark = DESC_IDLE;
> > > +
> > > + if (tx->cookie > 0)
> > > + pm_runtime_put(sh_chan->dev);
> > > list_move(&desc->node, &sh_chan->ld_free);
> > > }
> > > }
> > > @@ -894,6 +897,7 @@ static bool sh_dmae_reset(struct sh_dmae_device *shdev)
> > > desc->mark = DESC_IDLE;
> > > if (tx->callback)
> > > tx->callback(tx->callback_param);
> > > + pm_runtime_put(sh_chan->dev);
> > > }
> > >
> > > spin_lock(&sh_chan->desc_lock);
> >
> >
> > --
> > ~Vinod
> >
>
> ---
> Guennadi Liakhovetski, Ph.D.
> Freelance Open-Source Software Developer
> http://www.open-technology.de/
^ permalink raw reply [flat|nested] 6+ messages in thread
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2011-06-01 7:20 [PATCH/RFC] dma: shdma: transfer based runtime PM Guennadi Liakhovetski
2011-06-01 8:14 ` Koul, Vinod
2011-07-07 13:24 ` Guennadi Liakhovetski
2011-07-07 13:53 ` Koul, Vinod
2011-06-24 8:55 ` Paul Mundt
2011-06-24 9:04 ` Guennadi Liakhovetski
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