lkml.org 
[lkml]   [2009]   [Nov]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    Subject[patch 49/52] [PATCH] cio: quiesce subchannel in io_subchannel_remove
    From: Sebastian Ott <sebott@linux.vnet.ibm.com>

    Ensure that there will be no more interrupts for an
    unregistered device by using the same quiesce and disable loop
    as in io_subchannel_shutdown.

    Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
    Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
    ---

    drivers/s390/cio/device.c | 10 +++++++++-
    1 file changed, 9 insertions(+), 1 deletion(-)

    Index: quilt-2.6/drivers/s390/cio/device.c
    ===================================================================
    --- quilt-2.6.orig/drivers/s390/cio/device.c 2009-11-13 16:08:22.000000000 +0100
    +++ quilt-2.6/drivers/s390/cio/device.c 2009-11-13 16:08:22.000000000 +0100
    @@ -1059,6 +1059,8 @@
    return 0;
    }

    +static void io_subchannel_quiesce(struct subchannel *);
    +
    static int
    io_subchannel_remove (struct subchannel *sch)
    {
    @@ -1068,6 +1070,7 @@
    cdev = sch_get_cdev(sch);
    if (!cdev)
    goto out_free;
    + io_subchannel_quiesce(sch);
    /* Set ccw device to not operational and drop reference. */
    spin_lock_irqsave(cdev->ccwlock, flags);
    sch_set_cdev(sch, NULL);
    @@ -1150,7 +1153,7 @@
    return 0;
    }

    -static void io_subchannel_shutdown(struct subchannel *sch)
    +static void io_subchannel_quiesce(struct subchannel *sch)
    {
    struct ccw_device *cdev;
    int ret;
    @@ -1182,6 +1185,11 @@
    spin_unlock_irq(sch->lock);
    }

    +static void io_subchannel_shutdown(struct subchannel *sch)
    +{
    + io_subchannel_quiesce(sch);
    +}
    +
    static int device_is_disconnected(struct ccw_device *cdev)
    {
    if (!cdev)


    \
     
     \ /
      Last update: 2009-11-13 16:15    [W:2.261 / U:0.068 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site