The patch titled
usb: at91_udc: correct hanging while disconnecting usb cable
has been added to the -mm tree. Its filename is
usb-at91_udc-correct-hanging-while-disconnecting-usb-cable.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: usb: at91_udc: correct hanging while disconnecting usb cable
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]>
Cc: Greg KH <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
drivers/usb/gadget/at91_udc.c | 2 ++
1 file changed, 2 insertions(+)
diff -puN
drivers/usb/gadget/at91_udc.c~usb-at91_udc-correct-hanging-while-disconnecting-usb-cable
drivers/usb/gadget/at91_udc.c
---
a/drivers/usb/gadget/at91_udc.c~usb-at91_udc-correct-hanging-while-disconnecting-usb-cable
+++ a/drivers/usb/gadget/at91_udc.c
@@ -887,6 +887,7 @@ static void pullup(struct at91_udc *udc,
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,
}
} 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);
_
Patches currently in -mm which might be from [EMAIL PROTECTED] are
git-arm.patch
usb-at91_udc-correct-hanging-while-disconnecting-usb-cable.patch
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