The patch titled
usb: at91_udc: correct hanging while disconnecting usb cable
has been removed from the -mm tree. Its filename was
usb-at91_udc-correct-hanging-while-disconnecting-usb-cable.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: usb: at91_udc: correct hanging while disconnecting usb cable
From: Nicolas Ferre <nicolas.ferre@xxxxxxxxx>
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 <nicolas.ferre@xxxxxxxxxxxxx>
Acked-by: David Brownell <david-b@xxxxxxxxxxx>
Cc: Greg KH <greg@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
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 nicolas.ferre@xxxxxxxxx are
origin.patch
git-arm.patch
-
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