> From: Matthijs Kooijman [mailto:matthijs@xxxxxxxx] > Sent: Thursday, April 11, 2013 8:53 AM > > Before, this was initialized in pci.c, after the dwc2_hcd_init was > called and the interrupts were enabled. This opened up a small time > window where common interrupts could be triggered, but there was no > handler for them, causing them to keep triggering infinitely and locking > up the machine. > > On my RT3052 board this bug could be easily reproduced by hardcoding > the console log level to 8, so that a bunch of debug output from the dwc2 > driver was generated inside this time window. This caused the interrupt > lockup to occur almost every time. > > By requesting the irq inside dwc2_core_init and by disabling interrupts > before calling dwc2_core_init instead of after, we can be sure the > handler is registered before the interrupts are enabled, which should > close this window. > > Reported-by: Stephen Warren <swarren@xxxxxxxxxxxxx> > Signed-off-by: Matthijs Kooijman <matthijs@xxxxxxxx> Acked-by: Paul Zimmerman <paulz@xxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
