diff options
| -rw-r--r-- | drivers/dma/omap-dma.c | 59 |
1 files changed, 2 insertions, 57 deletions
diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c index 4afc2c18d451..4e4642f561f5 100644 --- a/drivers/dma/omap-dma.c +++ b/drivers/dma/omap-dma.c @@ -28,8 +28,6 @@ struct omap_dmadev { struct dma_device ddev; spinlock_t lock; - struct tasklet_struct task; - struct list_head pending; void __iomem *base; const struct omap_dma_reg *reg_map; struct omap_system_dma_plat_info *plat; @@ -42,7 +40,6 @@ struct omap_dmadev { struct omap_chan { struct virt_dma_chan vc; - struct list_head node; void __iomem *channel_base; const struct omap_dma_reg *reg_map; uint32_t ccr; @@ -454,33 +451,6 @@ static void omap_dma_callback(int ch, u16 status, void *data) spin_unlock_irqrestore(&c->vc.lock, flags); } -/* - * This callback schedules all pending channels. We could be more - * clever here by postponing allocation of the real DMA channels to - * this point, and freeing them when our virtual channel becomes idle. - * - * We would then need to deal with 'all channels in-use' - */ -static void omap_dma_sched(unsigned long data) -{ - struct omap_dmadev *d = (struct omap_dmadev *)data; - LIST_HEAD(head); - - spin_lock_irq(&d->lock); - list_splice_tail_init(&d->pending, &head); - spin_unlock_irq(&d->lock); - - while (!list_empty(&head)) { - struct omap_chan *c = list_first_entry(&head, - struct omap_chan, node); - - spin_lock_irq(&c->vc.lock); - list_del_init(&c->node); - omap_dma_start_desc(c); - spin_unlock_irq(&c->vc.lock); - } -} - static irqreturn_t omap_dma_irq(int irq, void *devid) { struct omap_dmadev *od = devid; @@ -739,22 +709,8 @@ static void omap_dma_issue_pending(struct dma_chan *chan) unsigned long flags; spin_lock_irqsave(&c->vc.lock, flags); - if (vchan_issue_pending(&c->vc) && !c->desc) { - /* - * 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); - } - } + if (vchan_issue_pending(&c->vc) && !c->desc) + omap_dma_start_desc(c); spin_unlock_irqrestore(&c->vc.lock, flags); } @@ -1017,17 +973,11 @@ static int omap_dma_slave_config(struct dma_chan *chan, struct dma_slave_config static int omap_dma_terminate_all(struct dma_chan *chan) { struct omap_chan *c = to_omap_dma_chan(chan); - struct omap_dmadev *d = to_omap_dma_dev(c->vc.chan.device); unsigned long flags; LIST_HEAD(head); spin_lock_irqsave(&c->vc.lock, flags); - /* Prevent this channel being scheduled */ - spin_lock(&d->lock); - list_del_init(&c->node); - spin_unlock(&d->lock); - /* * Stop DMA activity: we assume the callback will not be called * after omap_dma_stop() returns (even if it does, it will see @@ -1101,14 +1051,12 @@ static int omap_dma_chan_init(struct omap_dmadev *od) c->reg_map = od->reg_map; c->vc.desc_free = omap_dma_desc_free; vchan_init(&c->vc, &od->ddev); - INIT_LIST_HEAD(&c->node); return 0; } static void omap_dma_free(struct omap_dmadev *od) { - tasklet_kill(&od->task); while (!list_empty(&od->ddev.channels)) { struct omap_chan *c = list_first_entry(&od->ddev.channels, struct omap_chan, vc.chan.device_node); @@ -1164,12 +1112,9 @@ static int omap_dma_probe(struct platform_device *pdev) od->ddev.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; od->ddev.dev = &pdev->dev; INIT_LIST_HEAD(&od->ddev.channels); - INIT_LIST_HEAD(&od->pending); spin_lock_init(&od->lock); spin_lock_init(&od->irq_lock); - tasklet_init(&od->task, omap_dma_sched, (unsigned long)od); - od->dma_requests = OMAP_SDMA_REQUESTS; if (pdev->dev.of_node && of_property_read_u32(pdev->dev.of_node, "dma-requests", |