target/linux/brcm2708/patches-4.4/0206-dwc_otg-Don-t-free-qh-align-buffers-in-atomic-contex.patch

   1 From d309ffcbd73c0fb942d4f92b1a5089a40fe3855e Mon Sep 17 00:00:00 2001
   2 From: P33M <P33M@github.com>
   3 Date: Fri, 18 Mar 2016 17:38:37 +0000
   4 Subject: [PATCH 206/423] dwc_otg: Don't free qh align buffers in atomic
   5  context
   6
   7 ---
   8  drivers/usb/host/dwc_otg/dwc_otg_hcd_queue.c | 9 +++++++--
   9  1 file changed, 7 insertions(+), 2 deletions(-)
  10
  11 --- a/drivers/usb/host/dwc_otg/dwc_otg_hcd_queue.c
  12 +++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_queue.c
  13 @@ -56,6 +56,9 @@ void dwc_otg_hcd_qh_free(dwc_otg_hcd_t *
  14  {
  15         dwc_otg_qtd_t *qtd, *qtd_tmp;
  16         dwc_irqflags_t flags;
  17 +       uint32_t buf_size = 0;
  18 +       uint8_t *align_buf_virt = NULL;
  19 +       dwc_dma_t align_buf_dma;
  20
  21         /* Free each QTD in the QTD list */
  22         DWC_SPINLOCK_IRQSAVE(hcd->lock, &flags);
  23 @@ -67,17 +70,19 @@ void dwc_otg_hcd_qh_free(dwc_otg_hcd_t *
  24         if (hcd->core_if->dma_desc_enable) {
  25                 dwc_otg_hcd_qh_free_ddma(hcd, qh);
  26         } else if (qh->dw_align_buf) {
  27 -               uint32_t buf_size;
  28                 if (qh->ep_type == UE_ISOCHRONOUS) {
  29                         buf_size = 4096;
  30                 } else {
  31                         buf_size = hcd->core_if->core_params->max_transfer_size;
  32                 }
  33 -               DWC_DMA_FREE(buf_size, qh->dw_align_buf, qh->dw_align_buf_dma);
  34 +               align_buf_virt = qh->dw_align_buf;
  35 +               align_buf_dma = qh->dw_align_buf_dma;
  36         }
  37
  38         DWC_FREE(qh);
  39         DWC_SPINUNLOCK_IRQRESTORE(hcd->lock, flags);
  40 +       if (align_buf_virt)
  41 +               DWC_DMA_FREE(buf_size, align_buf_virt, align_buf_dma);
  42         return;
  43  }
  44