Merge tag 'v3.15-rc1' into patchwork

Linux 3.15-rc1

* tag 'v3.15-rc1': (12180 commits)
  Linux 3.15-rc1
  mm: Initialize error in shmem_file_aio_read()
  cifs: Use min_t() when comparing "size_t" and "unsigned long"
  sym53c8xx_2: Set DID_REQUEUE return code when aborting squeue
  powerpc: Don't try to set LPCR unless we're in hypervisor mode
  futex: update documentation for ordering guarantees
  ceph: fix pr_fmt() redefinition
  vti: don't allow to add the same tunnel twice
  gre: don't allow to add the same tunnel twice
  drivers: net: xen-netfront: fix array initialization bug
  missing bits of "splice: fix racy pipe->buffers uses"
  cifs: fix the race in cifs_writev()
  ceph_sync_{,direct_}write: fix an oops on ceph_osdc_new_request() failure
  pktgen: be friendly to LLTX devices
  r8152: check RTL8152_UNPLUG
  net: sun4i-emac: add promiscuous support
  net/apne: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO
  blackfin: cleanup board files
  bf609: clock: drop unused clock bit set/clear functions
  Blackfin: bf537: rename "CONFIG_ADT75"
  ...

1 files changed, 68 insertions, 1 deletions

diff --git a/drivers/usb/musb/musb_cppi41.c b/drivers/usb/musb/musb_cppi41.c
index f88929609bac..7b8bbf53127e 100644
--- a/drivers/usb/musb/musb_cppi41.c
+++ b/drivers/usb/musb/musb_cppi41.c
@@ -39,6 +39,7 @@ struct cppi41_dma_channel {
 	u32 transferred;
 	u32 packet_sz;
 	struct list_head tx_check;
+	struct work_struct dma_completion;
 };
 
 #define MUSB_DMA_NUM_CHANNELS 15
@@ -112,6 +113,18 @@ static bool musb_is_tx_fifo_empty(struct musb_hw_ep *hw_ep)
 	return true;
 }
 
+static bool is_isoc(struct musb_hw_ep *hw_ep, bool in)
+{
+	if (in && hw_ep->in_qh) {
+		if (hw_ep->in_qh->type == USB_ENDPOINT_XFER_ISOC)
+			return true;
+	} else if (hw_ep->out_qh) {
+		if (hw_ep->out_qh->type == USB_ENDPOINT_XFER_ISOC)
+			return true;
+	}
+	return false;
+}
+
 static void cppi41_dma_callback(void *private_data);
 
 static void cppi41_trans_done(struct cppi41_dma_channel *cppi41_channel)
@@ -119,7 +132,8 @@ static void cppi41_trans_done(struct cppi41_dma_channel *cppi41_channel)
 	struct musb_hw_ep *hw_ep = cppi41_channel->hw_ep;
 	struct musb *musb = hw_ep->musb;
 
-	if (!cppi41_channel->prog_len) {
+	if (!cppi41_channel->prog_len ||
+	    (cppi41_channel->channel.status == MUSB_DMA_STATUS_FREE)) {
 
 		/* done, complete */
 		cppi41_channel->channel.actual_len =
@@ -165,6 +179,32 @@ static void cppi41_trans_done(struct cppi41_dma_channel *cppi41_channel)
 	}
 }
 
+static void cppi_trans_done_work(struct work_struct *work)
+{
+	unsigned long flags;
+	struct cppi41_dma_channel *cppi41_channel =
+		container_of(work, struct cppi41_dma_channel, dma_completion);
+	struct cppi41_dma_controller *controller = cppi41_channel->controller;
+	struct musb *musb = controller->musb;
+	struct musb_hw_ep *hw_ep = cppi41_channel->hw_ep;
+	bool empty;
+
+	if (!cppi41_channel->is_tx && is_isoc(hw_ep, 1)) {
+		spin_lock_irqsave(&musb->lock, flags);
+		cppi41_trans_done(cppi41_channel);
+		spin_unlock_irqrestore(&musb->lock, flags);
+	} else {
+		empty = musb_is_tx_fifo_empty(hw_ep);
+		if (empty) {
+			spin_lock_irqsave(&musb->lock, flags);
+			cppi41_trans_done(cppi41_channel);
+			spin_unlock_irqrestore(&musb->lock, flags);
+		} else {
+			schedule_work(&cppi41_channel->dma_completion);
+		}
+	}
+}
+
 static enum hrtimer_restart cppi41_recheck_tx_req(struct hrtimer *timer)
 {
 	struct cppi41_dma_controller *controller;
@@ -228,6 +268,14 @@ static void cppi41_dma_callback(void *private_data)
 			transferred < cppi41_channel->packet_sz)
 		cppi41_channel->prog_len = 0;
 
+	if (!cppi41_channel->is_tx) {
+		if (is_isoc(hw_ep, 1))
+			schedule_work(&cppi41_channel->dma_completion);
+		else
+			cppi41_trans_done(cppi41_channel);
+		goto out;
+	}
+
 	empty = musb_is_tx_fifo_empty(hw_ep);
 	if (empty) {
 		cppi41_trans_done(cppi41_channel);
@@ -264,6 +312,10 @@ static void cppi41_dma_callback(void *private_data)
 				goto out;
 			}
 		}
+		if (is_isoc(hw_ep, 0)) {
+			schedule_work(&cppi41_channel->dma_completion);
+			goto out;
+		}
 		list_add_tail(&cppi41_channel->tx_check,
 				&controller->early_tx_list);
 		if (!hrtimer_active(&controller->early_tx)) {
@@ -448,12 +500,25 @@ static int cppi41_dma_channel_program(struct dma_channel *channel,
 				dma_addr_t dma_addr, u32 len)
 {
 	int ret;
+	struct cppi41_dma_channel *cppi41_channel = channel->private_data;
+	int hb_mult = 0;
 
 	BUG_ON(channel->status == MUSB_DMA_STATUS_UNKNOWN ||
 		channel->status == MUSB_DMA_STATUS_BUSY);
 
+	if (is_host_active(cppi41_channel->controller->musb)) {
+		if (cppi41_channel->is_tx)
+			hb_mult = cppi41_channel->hw_ep->out_qh->hb_mult;
+		else
+			hb_mult = cppi41_channel->hw_ep->in_qh->hb_mult;
+	}
+
 	channel->status = MUSB_DMA_STATUS_BUSY;
 	channel->actual_len = 0;
+
+	if (hb_mult)
+		packet_sz = hb_mult * (packet_sz & 0x7FF);
+
 	ret = cppi41_configure_channel(channel, packet_sz, mode, dma_addr, len);
 	if (!ret)
 		channel->status = MUSB_DMA_STATUS_FREE;
@@ -607,6 +672,8 @@ static int cppi41_dma_controller_start(struct cppi41_dma_controller *controller)
 		cppi41_channel->port_num = port;
 		cppi41_channel->is_tx = is_tx;
 		INIT_LIST_HEAD(&cppi41_channel->tx_check);
+		INIT_WORK(&cppi41_channel->dma_completion,
+			  cppi_trans_done_work);
 
 		musb_dma = &cppi41_channel->channel;
 		musb_dma->private_data = cppi41_channel;