From 8e62c5a411874691e8938fa439978de9fa7c58c8 Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Wed, 22 Aug 2007 15:15:42 -0700 Subject: USB: allow retry on descriptor fetch errors This patch (as964) was suggested by Steffen Koepf. It makes usb_get_descriptor() retry on all errors other than ETIMEDOUT, instead of only on EPIPE. This helps with some devices. Signed-off-by: Alan Stern Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/message.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c index f9fed34bf7d..8d710606767 100644 --- a/drivers/usb/core/message.c +++ b/drivers/usb/core/message.c @@ -623,12 +623,12 @@ int usb_get_descriptor(struct usb_device *dev, unsigned char type, unsigned char memset(buf,0,size); // Make sure we parse really received data for (i = 0; i < 3; ++i) { - /* retry on length 0 or stall; some devices are flakey */ + /* retry on length 0 or error; some devices are flakey */ result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), USB_REQ_GET_DESCRIPTOR, USB_DIR_IN, (type << 8) + index, 0, buf, size, USB_CTRL_GET_TIMEOUT); - if (result == 0 || result == -EPIPE) + if (result <= 0 && result != -ETIMEDOUT) continue; if (result > 1 && ((u8 *)buf)[1] != type) { result = -EPROTO; -- cgit v1.2.3-18-g5258