commit: 3824c1ddaf744be44b170a335332b9d6afe79254 From: Libor Pechacek <[email protected]> Date: Fri, 20 May 2011 14:53:25 +0200 Subject: [PATCH] USB: core: Tolerate protocol stall during hub and port status read
Protocol stall should not be fatal while reading port or hub status as it is transient state. Currently hub EP0 STALL during port status read results in failed device enumeration. This has been observed with ST-Ericsson (formerly Philips) USB 2.0 Hub (04cc:1521) after connecting keyboard. Signed-off-by: Libor Pechacek <[email protected]> Acked-by: Alan Stern <[email protected]> Cc: stable <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/usb/core/hub.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 79a58c3..90ae175 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -339,7 +339,8 @@ static int get_hub_status(struct usb_device *hdev, { int i, status = -ETIMEDOUT; - for (i = 0; i < USB_STS_RETRIES && status == -ETIMEDOUT; i++) { + for (i = 0; i < USB_STS_RETRIES && + (status == -ETIMEDOUT || status == -EPIPE); i++) { status = usb_control_msg(hdev, usb_rcvctrlpipe(hdev, 0), USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0, data, sizeof(*data), USB_STS_TIMEOUT); @@ -355,7 +356,8 @@ static int get_port_status(struct usb_device *hdev, int port1, { int i, status = -ETIMEDOUT; - for (i = 0; i < USB_STS_RETRIES && status == -ETIMEDOUT; i++) { + for (i = 0; i < USB_STS_RETRIES && + (status == -ETIMEDOUT || status == -EPIPE); i++) { status = usb_control_msg(hdev, usb_rcvctrlpipe(hdev, 0), USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port1, data, sizeof(*data), USB_STS_TIMEOUT); _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
