recipes-kernel/linux/linux-ti33x-psp-3.2/psp/0016-usb-musb-cppi41-tx-dma-completion-fixes.patch

   1 From 2e3ec89c3e6cf54d83479d7437696343463c90e5 Mon Sep 17 00:00:00 2001
   2 From: Ajay Kumar Gupta <ajay.gupta@ti.com>
   3 Date: Thu, 24 May 2012 16:03:02 +0530
   4 Subject: [PATCH 16/18] usb: musb: cppi41: tx dma completion fixes
   5
   6 Use spinlock_irqsave/restore only during txdma completion giveback.
   7
   8 Signed-off-by: Ravi B <ravibabu@ti.com>
   9 ---
  10  drivers/usb/musb/cppi41_dma.c |    5 +++--
  11  1 files changed, 3 insertions(+), 2 deletions(-)
  12
  13 diff --git a/drivers/usb/musb/cppi41_dma.c b/drivers/usb/musb/cppi41_dma.c
  14 index 4367e4f..ea83f9a 100644
  15 --- a/drivers/usb/musb/cppi41_dma.c
  16 +++ b/drivers/usb/musb/cppi41_dma.c
  17 @@ -1354,7 +1354,6 @@ void txdma_completion_work(struct work_struct *data)
  18                         u16 csr;
  19
  20                         tx_ch = &cppi->tx_cppi_ch[index];
  21 -                       spin_lock_irqsave(&musb->lock, flags);
  22                         if (tx_ch->tx_complete) {
  23                                 /* Sometimes a EP can unregister from a DMA
  24                                  * channel while the data is still in the FIFO.
  25 @@ -1384,10 +1383,12 @@ void txdma_completion_work(struct work_struct *data)
  26                                         tx_ch->channel.status =
  27                                                 MUSB_DMA_STATUS_FREE;
  28                                         tx_ch->tx_complete = 0;
  29 +                                       spin_lock_irqsave(&musb->lock, flags);
  30                                         musb_dma_completion(musb, index+1, 1);
  31 +                                       spin_unlock_irqrestore(&musb->lock,
  32 +                                               flags);
  33                                 }
  34                         }
  35 -                       spin_unlock_irqrestore(&musb->lock, flags);
  36
  37                         if (!resched)
  38                                 cond_resched();
  39 --
  40 1.7.7.6
  41