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usb: langwell_udc: cancel pending requests when controller is suspended.

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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>
This commit is contained in:
Philippe Skowronski 2010-10-01 14:59:16 +01:00 committed by Greg Kroah-Hartman
parent c8458d59d4
commit cf7d3c8e57
1 changed files with 5 additions and 0 deletions
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5
drivers/usb/gadget/langwell_udc.c
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@ -3391,6 +3391,11 @@ static int langwell_udc_suspend(struct pci_dev *pdev, pm_message_t state)
/* 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);