tree c28bc6eb94b6e4d4de5a4e918b7cf170f4e2485f
parent 60b0bf0f11a02a6c288c7a923b2521aa7cfdc6c3
author Akinobu Mita <akinobu.mita@gmail.com> 1299065728 +0900
committer Greg Kroah-Hartman <gregkh@suse.de> 1299113548 -0500

wusb: fix find_first_zero_bit() return value check

In wusb_cluster_id_get(), if no zero bits exist in wusb_cluster_id_table,
find_first_zero_bit() returns CLUSTER_IDS.

But it is impossible to detect that the bitmap is full because there
is an off-by-one error in the return value check.  It will cause
unexpected memory access by setting bit out of wusb_cluster_id_table
bitmap, and caller will get wrong cluster id.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: linux-usb@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>