From: Steffen Koepf <[EMAIL PROTECTED]>
There is a USB-Device Init-Problem with the Apacer AE161 USB-Cardreader,
which contains the Chip AU6375. The Cardreader init fails in about 50%
of system boots, with the following lines:
usb 1-6: unable to read config index 0 descriptor/all
usb 1-6: can't read configurations, error -71
hub 1-0:1.0: Cannot enable port 6. Maybe the USB cable is bad?
The patch let's the kernel stay in the loop if a usb_control_msg() fails,
the cardreader is detected properly and the loop is never executed more
than two times. The second call of usb_control_msg succeeds always. Maybe
it was the developer's goal of the loop to fix such things?
Kernel: 2.6.22.2
Signed-off-by: Steffen Koepf <[EMAIL PROTECTED]>
---
--- linux-2.6.22.2/drivers/usb/core/message.c.orig Mon Aug 13 22:12:34 2007
+++ linux-2.6.22.2/drivers/usb/core/message.c Mon Aug 13 22:12:52 2007
@@ -634,6 +634,8 @@ int usb_get_descriptor(struct usb_device
result = -EPROTO;
continue;
}
+ if (result < 0)
+ continue;
break;
}
return result;
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