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

   1 From 63c48596343f1431c898381a06629eef2719fbeb 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] dwc_otg: Don't free qh align buffers in atomic context
   5
   6 ---
   7  drivers/usb/host/dwc_otg/dwc_otg_hcd_queue.c | 9 +++++++--
   8  1 file changed, 7 insertions(+), 2 deletions(-)
   9
  10 --- a/drivers/usb/host/dwc_otg/dwc_otg_hcd_queue.c
  11 +++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_queue.c
  12 @@ -56,6 +56,9 @@ void dwc_otg_hcd_qh_free(dwc_otg_hcd_t *
  13  {
  14         dwc_otg_qtd_t *qtd, *qtd_tmp;
  15         dwc_irqflags_t flags;
  16 +       uint32_t buf_size = 0;
  17 +       uint8_t *align_buf_virt = NULL;
  18 +       dwc_dma_t align_buf_dma;
  19
  20         /* Free each QTD in the QTD list */
  21         DWC_SPINLOCK_IRQSAVE(hcd->lock, &flags);
  22 @@ -67,17 +70,19 @@ void dwc_otg_hcd_qh_free(dwc_otg_hcd_t *
  23         if (hcd->core_if->dma_desc_enable) {
  24                 dwc_otg_hcd_qh_free_ddma(hcd, qh);
  25         } else if (qh->dw_align_buf) {
  26 -               uint32_t buf_size;
  27                 if (qh->ep_type == UE_ISOCHRONOUS) {
  28                         buf_size = 4096;
  29                 } else {
  30                         buf_size = hcd->core_if->core_params->max_transfer_size;
  31                 }
  32 -               DWC_DMA_FREE(buf_size, qh->dw_align_buf, qh->dw_align_buf_dma);
  33 +               align_buf_virt = qh->dw_align_buf;
  34 +               align_buf_dma = qh->dw_align_buf_dma;
  35         }
  36
  37         DWC_FREE(qh);
  38         DWC_SPINUNLOCK_IRQRESTORE(hcd->lock, flags);
  39 +       if (align_buf_virt)
  40 +               DWC_DMA_FREE(buf_size, align_buf_virt, align_buf_dma);
  41         return;
  42  }
  43