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[4/6] USB: fsl_qe_udc: Fix disconnects reporting during bus reset

Message ID 20081225141509.GD6786@oksana.dev.rtsoft.ru (mailing list archive)
State Accepted, archived
Delegated to: Kumar Gala
Headers show

Commit Message

Anton Vorontsov Dec. 25, 2008, 2:15 p.m. UTC 
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>
---
 drivers/usb/gadget/fsl_qe_udc.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
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Patch

diff --git a/drivers/usb/gadget/fsl_qe_udc.c b/drivers/usb/gadget/fsl_qe_udc.c
index b460c6d..4726582 100644
--- a/drivers/usb/gadget/fsl_qe_udc.c
+++ b/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);