diff options
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/at_hdmac.c | 9 | ||||
| -rw-r--r-- | drivers/dma/omap-dma.c | 20 | ||||
| -rw-r--r-- | drivers/dma/pl330.c | 38 |
3 files changed, 45 insertions, 22 deletions
diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c index 6e13f262139a..88cfc61329d2 100644 --- a/drivers/dma/at_hdmac.c +++ b/drivers/dma/at_hdmac.c @@ -310,8 +310,6 @@ static void atc_complete_all(struct at_dma_chan *atchan) dev_vdbg(chan2dev(&atchan->chan_common), "complete all\n"); - BUG_ON(atc_chan_is_enabled(atchan)); - /* * Submit queued descriptors ASAP, i.e. before we go through * the completed ones. @@ -368,6 +366,9 @@ static void atc_advance_work(struct at_dma_chan *atchan) { dev_vdbg(chan2dev(&atchan->chan_common), "advance_work\n"); + if (atc_chan_is_enabled(atchan)) + return; + if (list_empty(&atchan->active_list) || list_is_singular(&atchan->active_list)) { atc_complete_all(atchan); @@ -1078,9 +1079,7 @@ static void atc_issue_pending(struct dma_chan *chan) return; spin_lock_irqsave(&atchan->lock, flags); - if (!atc_chan_is_enabled(atchan)) { - atc_advance_work(atchan); - } + atc_advance_work(atchan); spin_unlock_irqrestore(&atchan->lock, flags); } diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c index c4b4fd2acc42..08b43bf37158 100644 --- a/drivers/dma/omap-dma.c +++ b/drivers/dma/omap-dma.c @@ -276,12 +276,20 @@ static void omap_dma_issue_pending(struct dma_chan *chan) spin_lock_irqsave(&c->vc.lock, flags); if (vchan_issue_pending(&c->vc) && !c->desc) { - struct omap_dmadev *d = to_omap_dma_dev(chan->device); - spin_lock(&d->lock); - if (list_empty(&c->node)) - list_add_tail(&c->node, &d->pending); - spin_unlock(&d->lock); - tasklet_schedule(&d->task); + /* + * c->cyclic is used only by audio and in this case the DMA need + * to be started without delay. + */ + if (!c->cyclic) { + struct omap_dmadev *d = to_omap_dma_dev(chan->device); + spin_lock(&d->lock); + if (list_empty(&c->node)) + list_add_tail(&c->node, &d->pending); + spin_unlock(&d->lock); + tasklet_schedule(&d->task); + } else { + omap_dma_start_desc(c); + } } spin_unlock_irqrestore(&c->vc.lock, flags); } diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c index 718153122759..5dbc5946c4c3 100644 --- a/drivers/dma/pl330.c +++ b/drivers/dma/pl330.c @@ -2882,7 +2882,7 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id) { struct dma_pl330_platdata *pdat; struct dma_pl330_dmac *pdmac; - struct dma_pl330_chan *pch; + struct dma_pl330_chan *pch, *_p; struct pl330_info *pi; struct dma_device *pd; struct resource *res; @@ -2984,7 +2984,16 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id) ret = dma_async_device_register(pd); if (ret) { dev_err(&adev->dev, "unable to register DMAC\n"); - goto probe_err2; + goto probe_err3; + } + + if (adev->dev.of_node) { + ret = of_dma_controller_register(adev->dev.of_node, + of_dma_pl330_xlate, pdmac); + if (ret) { + dev_err(&adev->dev, + "unable to register DMA to the generic DT DMA helpers\n"); + } } dev_info(&adev->dev, @@ -2995,16 +3004,21 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id) pi->pcfg.data_bus_width / 8, pi->pcfg.num_chan, pi->pcfg.num_peri, pi->pcfg.num_events); - ret = of_dma_controller_register(adev->dev.of_node, - of_dma_pl330_xlate, pdmac); - if (ret) { - dev_err(&adev->dev, - "unable to register DMA to the generic DT DMA helpers\n"); - goto probe_err2; - } - return 0; +probe_err3: + amba_set_drvdata(adev, NULL); + /* Idle the DMAC */ + list_for_each_entry_safe(pch, _p, &pdmac->ddma.channels, + chan.device_node) { + + /* Remove the channel */ + list_del(&pch->chan.device_node); + + /* Flush the channel */ + pl330_control(&pch->chan, DMA_TERMINATE_ALL, 0); + pl330_free_chan_resources(&pch->chan); + } probe_err2: pl330_del(pi); probe_err1: @@ -3023,8 +3037,10 @@ static int pl330_remove(struct amba_device *adev) if (!pdmac) return 0; - of_dma_controller_free(adev->dev.of_node); + if (adev->dev.of_node) + of_dma_controller_free(adev->dev.of_node); + dma_async_device_unregister(&pdmac->ddma); amba_set_drvdata(adev, NULL); /* Idle the DMAC */ |