From: Anton Vorontsov <avorontsov@xxxxxxxxxxxxx>
Freescale QE UDC controllers can't report the "port change" states, so the
only way to handle disconnects is to process bus reset interrupts. The
bus reset can take some time, that is, few irqs. Gadgets may print the
disconnection events, and this causes few repetitive messages in the
kernel log.
This patch fixes the issue by using the usb_state machine, if the usb
controller has been already reset, just quit the reset irq early.
Signed-off-by: Anton Vorontsov <avorontsov@xxxxxxxxxxxxx>
Acked-by: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
Cc: Greg KH <greg@xxxxxxxxx>
Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/usb/gadget/fsl_qe_udc.c | 3 +++
1 file changed, 3 insertions(+)
diff -puN drivers/usb/gadget/fsl_qe_udc.c~usb-fsl_qe_udc-fix-disconnects-reporting-during-bus-reset drivers/usb/gadget/fsl_qe_udc.c
--- a/drivers/usb/gadget/fsl_qe_udc.c~usb-fsl_qe_udc-fix-disconnects-reporting-during-bus-reset
+++ a/drivers/usb/gadget/fsl_qe_udc.c
@@ -2161,6 +2161,9 @@ static int reset_irq(struct qe_udc *udc)
{
unsigned char i;
+ if (udc->usb_state == USB_STATE_DEFAULT)
+ return 0;
+
qe_usb_disable();
out_8(&udc->usb_regs->usb_usadr, 0);
_
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