usb: langwell_udc: cancel pending requests when controller is suspended.
It is safer to cancel pending requests before free dTD and dQH when
controller enters suspend state.
Signed-off-by: Philippe Skowronski <philippe.skowronski@intel.com>
Signed-off-by: Hao Wu <hao.wu@intel.com>
[Switch to spin_lock_irq as suggested by Alan Stern]
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/gadget/langwell_udc.c b/drivers/usb/gadget/langwell_udc.c
index 0643060..b8ec954 100644
--- a/drivers/usb/gadget/langwell_udc.c
+++ b/drivers/usb/gadget/langwell_udc.c
@@ -3391,6 +3391,11 @@
/* save PCI state */
pci_save_state(pdev);
+ spin_lock_irq(&dev->lock);
+ /* stop all usb activities */
+ stop_activity(dev, dev->driver);
+ spin_unlock_irq(&dev->lock);
+
/* free dTD dma_pool and dQH */
if (dev->dtd_pool)
dma_pool_destroy(dev->dtd_pool);
