• Alan Stern's avatar
    Driver core: driver_find() drops reference before returning · fde25a9b
    Alan Stern authored
    As part of the removal of get_driver()/put_driver(), this patch
    (as1510) changes driver_find(); it now drops the reference it acquires
    before returning.  The patch also adjusts all the callers of
    driver_find() to remove the now unnecessary calls to put_driver().
    
    In addition, the patch adds a warning to driver_find(): Callers must
    make sure the driver they are searching for does not get unloaded
    while they are using it.  This has always been the case; driver_find()
    has never prevented a driver from being unregistered or unloaded.
    Hence the patch will not introduce any new bugs.  The existing callers
    all seem to be okay in this respect, however I don't understand the
    video drivers well enough to be certain about them.
    Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
    CC: Dmitry Torokhov <dmitry.torokhov@gmail.com>
    CC: Kyungmin Park <kyungmin.park@samsung.com>
    CC: Andy Walls <awalls@md.metrocast.net>
    CC: Martin Schwidefsky <schwidefsky@de.ibm.com>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
    fde25a9b
driver.c 7 KB