From: Nicolas Ferre <[EMAIL PROTECTED]>
Correct hanging while disconnecting the USB device cable. Prevent a race
between vbus and UDP interrupts. This bug was tracked on at91sam9260ek
boards.
A usb resume interrupt was firing after the vbus interrupt : the IP was
then already stoped and not able to deal with it (no more clock). A simple
interrupt disabling is ok as the "end of bus reset" irq is non maskable and
ok to resume the USB device IP.
Signed-off-by: Nicolas Ferre <[EMAIL PROTECTED]>
Acked-by: David Brownell <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]>
---
drivers/usb/gadget/at91_udc.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c
index a6adf7e..cd62b02 100644
--- a/drivers/usb/gadget/at91_udc.c
+++ b/drivers/usb/gadget/at91_udc.c
@@ -887,6 +887,7 @@ static void pullup(struct at91_udc *udc, int is_on)
if (is_on) {
clk_on(udc);
+ at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_RXRSM);
at91_udp_write(udc, AT91_UDP_TXVC, 0);
if (cpu_is_at91rm9200())
at91_set_gpio_value(udc->board.pullup_pin, 1);
@@ -904,6 +905,7 @@ static void pullup(struct at91_udc *udc, int is_on)
}
} else {
stop_activity(udc);
+ at91_udp_write(udc, AT91_UDP_IDR, AT91_UDP_RXRSM);
at91_udp_write(udc, AT91_UDP_TXVC, AT91_UDP_TXVC_TXVDIS);
if (cpu_is_at91rm9200())
at91_set_gpio_value(udc->board.pullup_pin, 0);
--
1.5.3.7
-
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
