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USB: add a blacklist for devices that can't handle some things we throw at them.

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This adds a blacklist to the USB core to handle some autosuspend and
string issues that devices have.

Originally written by Oliver, but hacked up a lot by Greg.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Oliver Neukum
2007-01-26 14:26:21 +01:00
committed by Greg Kroah-Hartman
parent bb417020ba
commit 7ceec1f1d2
8 changed files with 108 additions and 2 deletions
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6
drivers/usb/core/message.c
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@ -11,6 +11,7 @@
#include <linux/timer.h>
#include <linux/ctype.h>
#include <linux/device.h>
#include <linux/usb/quirks.h>
#include <asm/byteorder.h>
#include <asm/scatterlist.h>
@ -685,7 +686,10 @@ static int usb_string_sub(struct usb_device *dev, unsigned int langid,
/* Try to read the string descriptor by asking for the maximum
* possible number of bytes */
rc = usb_get_string(dev, langid, index, buf, 255);
if (dev->quirks & USB_QUIRK_STRING_FETCH_255)
rc = -EIO;
else
rc = usb_get_string(dev, langid, index, buf, 255);
/* If that failed try to read the descriptor length, then
* ask for just that many bytes */