tegra: usb: disable interrupts when locking

Problem description:
 - tegra_udc_irq uses udc->lock
 - Some functions running in the process context was not disabling
   interrupts when locking udc->lock
 - If a function gets interrupted by tegra_udc_irq after locking
   udc->lock, a deadlock occurs, as tegra_udc_irq would also try to
   lock

Fix description:
 - Use an interruption disabling variant of spin_lock

Bug 983958

Change-Id: Ib774847212da64f1f727a207a4821860ffa7b4a8
Signed-off-by: Sang-Hun Lee <sanlee@nvidia.com>
Reviewed-on: http://git-master/r/104680
Reviewed-by: Manish Tuteja <mtuteja@nvidia.com>
Tested-by: Manish Tuteja <mtuteja@nvidia.com>

0 files changed, 0 insertions, 0 deletions