From: Philippe Skowronski <philippe.skowronski@xxxxxxxxx>
It is safer to cancel pending requests before free dTD and dQH when
controller enters suspend state.
Signed-off-by: Philippe Skowronski <philippe.skowronski@xxxxxxxxx>
Signed-off-by: Hao Wu <hao.wu@xxxxxxxxx>
Signed-off-by: Alan Cox <alan@xxxxxxxxxxxxxxx>
---
drivers/usb/gadget/langwell_udc.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/gadget/langwell_udc.c b/drivers/usb/gadget/langwell_udc.c
index 0643060..2e82093 100644
--- a/drivers/usb/gadget/langwell_udc.c
+++ b/drivers/usb/gadget/langwell_udc.c
@@ -3377,6 +3377,7 @@ error:
static int langwell_udc_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct langwell_udc *dev = the_controller;
+ unsigned long flags;
dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__);
@@ -3391,6 +3392,11 @@ static int langwell_udc_suspend(struct pci_dev *pdev, pm_message_t state)
/* save PCI state */
pci_save_state(pdev);
+ spin_lock_irqsave(&dev->lock, flags);
+ /* stop all usb activities */
+ stop_activity(dev, dev->driver);
+ spin_unlock_irqrestore(&dev->lock, flags);
+
/* free dTD dma_pool and dQH */
if (dev->dtd_pool)
dma_pool_destroy(dev->dtd_pool);
--
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