From eb764c4be1e5db3ee34df5745e98cf2f148c7320 Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Mon, 3 Mar 2008 15:16:04 -0500 Subject: USB: check serial-number string after device reset This patch (as1048) extends the descriptor checking after a device is reset. Now the SerialNumber string descriptor is compared to its old value, in addition to the device and configuration descriptors. As a consequence, the kmalloc() call in usb_string() is now on the error-handling pathway for usb-storage. Hence its allocation type is changed to GFO_NOIO. Signed-off-by: Alan Stern Signed-off-by: Greg Kroah-Hartman --- Documentation/usb/persist.txt | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'Documentation') diff --git a/Documentation/usb/persist.txt b/Documentation/usb/persist.txt index bea58dbd30f..d56cb1a1155 100644 --- a/Documentation/usb/persist.txt +++ b/Documentation/usb/persist.txt @@ -136,10 +136,10 @@ aren't guaranteed to be 100% accurate. If you replace one USB device with another of the same type (same manufacturer, same IDs, and so on) there's an excellent chance the -kernel won't detect the change. Serial numbers and other strings are -not compared. In many cases it wouldn't help if they were, because -manufacturers frequently omit serial numbers entirely in their -devices. +kernel won't detect the change. The serial number string and other +descriptors are compared with the kernel's stored values, but this +might not help since manufacturers frequently omit serial numbers +entirely in their devices. Furthermore it's quite possible to leave a USB device exactly the same while changing its media. If you replace the flash memory card in a -- cgit v1.2.3-70-g09d2