leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

USB: fsl_qe_udc: Fix disconnects reporting during bus reset

Browse Source 
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@ru.mvista.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Anton Vorontsov 2008-12-25 17:15:09 +03:00 committed by Greg Kroah-Hartman
parent 2247818a32
commit ef84e4055f
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/usb/gadget/fsl_qe_udc.c
View File

@ -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);