• Rafael J. Wysocki's avatar
    [PATCH] Fix microcode-related suspend problem · 1d64b9cb
    Rafael J. Wysocki authored
    Fix the regression resulting from the recent change of suspend code
    ordering that causes systems based on Intel x86 CPUs using the microcode
    driver to hang during the resume.
    
    The problem occurs since the microcode driver uses request_firmware() in
    its CPU hotplug notifier, which is called after tasks has been frozen and
    hangs.  It can be fixed by telling the microcode driver to use the
    microcode stored in memory during the resume instead of trying to load it
    from disk.
    Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
    Adrian Bunk <bunk@stusta.de>
    Cc: Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
    Cc: Pavel Machek <pavel@ucw.cz>
    Cc: Maxim <maximlevitsky@gmail.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    1d64b9cb
cpu.c 7.21 KB