iop-adma: remove the workaround for missed interrupts on iop3xx

This workaround was covering the dependency submission bug in async_tx.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

4 files changed, 0 insertions, 20 deletions

diff --git a/drivers/dma/iop-adma.c b/drivers/dma/iop-adma.c
index 2aa3df50c842..93252294f32b 100644
--- a/drivers/dma/iop-adma.c
+++ b/drivers/dma/iop-adma.c
@@ -255,8 +255,6 @@ static void __iop_adma_slot_cleanup(struct iop_adma_chan *iop_chan)
 
         BUG_ON(!seen_current);
 
-        iop_chan_idle(busy, iop_chan);
-
         if (cookie > 0) {
                 iop_chan->completed_cookie = cookie;
                 pr_debug("\tcompleted cookie %d\n", cookie);
@@ -1226,9 +1224,6 @@ static int __devinit iop_adma_probe(struct platform_device *pdev)
         }
 
         spin_lock_init(&iop_chan->lock);
-        init_timer(&iop_chan->cleanup_watchdog);
-        iop_chan->cleanup_watchdog.data = (unsigned long) iop_chan;
-        iop_chan->cleanup_watchdog.function = iop_adma_tasklet;
         INIT_LIST_HEAD(&iop_chan->chain);
         INIT_LIST_HEAD(&iop_chan->all_slots);
         INIT_RCU_HEAD(&iop_chan->common.rcu);
diff --git a/include/asm-arm/arch-iop13xx/adma.h b/include/asm-arm/arch-iop13xx/adma.h
index efd9a5eb1008..90d14ee564f5 100644
--- a/include/asm-arm/arch-iop13xx/adma.h
+++ b/include/asm-arm/arch-iop13xx/adma.h
@@ -454,11 +454,6 @@ static inline void iop_chan_append(struct iop_adma_chan *chan)
         __raw_writel(adma_accr, ADMA_ACCR(chan));
 }
 
-static inline void iop_chan_idle(int busy, struct iop_adma_chan *chan)
-{
-        do { } while (0);
-}
-
 static inline u32 iop_chan_get_status(struct iop_adma_chan *chan)
 {
         return __raw_readl(ADMA_ACSR(chan));
diff --git a/include/asm-arm/hardware/iop3xx-adma.h b/include/asm-arm/hardware/iop3xx-adma.h
index 5c529e6a5e3b..84d635b0a71a 100644
--- a/include/asm-arm/hardware/iop3xx-adma.h
+++ b/include/asm-arm/hardware/iop3xx-adma.h
@@ -767,20 +767,12 @@ static inline int iop_desc_get_zero_result(struct iop_adma_desc_slot *desc)
 static inline void iop_chan_append(struct iop_adma_chan *chan)
 {
         u32 dma_chan_ctrl;
-        /* workaround dropped interrupts on 3xx */
-        mod_timer(&chan->cleanup_watchdog, jiffies + msecs_to_jiffies(3));
 
         dma_chan_ctrl = __raw_readl(DMA_CCR(chan));
         dma_chan_ctrl |= 0x2;
         __raw_writel(dma_chan_ctrl, DMA_CCR(chan));
 }
 
-static inline void iop_chan_idle(int busy, struct iop_adma_chan *chan)
-{
-        if (!busy)
-                del_timer(&chan->cleanup_watchdog);
-}
-
 static inline u32 iop_chan_get_status(struct iop_adma_chan *chan)
 {
         return __raw_readl(DMA_CSR(chan));
diff --git a/include/asm-arm/hardware/iop_adma.h b/include/asm-arm/hardware/iop_adma.h
index ca8e71f44346..cb7e3611bcba 100644
--- a/include/asm-arm/hardware/iop_adma.h
+++ b/include/asm-arm/hardware/iop_adma.h
@@ -51,7 +51,6 @@ struct iop_adma_device {
  * @common: common dmaengine channel object members
  * @last_used: place holder for allocation to continue from where it left off
  * @all_slots: complete domain of slots usable by the channel
- * @cleanup_watchdog: workaround missed interrupts on iop3xx
  * @slots_allocated: records the actual size of the descriptor slot pool
  * @irq_tasklet: bottom half where iop_adma_slot_cleanup runs
  */
@@ -65,7 +64,6 @@ struct iop_adma_chan {
         struct dma_chan common;
         struct iop_adma_desc_slot *last_used;
         struct list_head all_slots;
-        struct timer_list cleanup_watchdog;
         int slots_allocated;
         struct tasklet_struct irq_tasklet;
 };