lkml.org 
[lkml]   [2012]   [Apr]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 1/2] libata: add a host flag to ignore detected ATA devices
    Date
    Where devices are visible via more than one host we sometimes wish to
    indicate that cirtain devices should be ignored on a specific host. Add a
    host flag indicating that this host wishes to ignore ATA specific devices.

    Signed-off-by: Andy Whitcroft <apw@canonical.com>
    ---
    drivers/ata/libata-core.c | 6 ++++++
    include/linux/libata.h | 1 +
    2 files changed, 7 insertions(+)

    diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
    index e0bda9f..18e87bf 100644
    --- a/drivers/ata/libata-core.c
    +++ b/drivers/ata/libata-core.c
    @@ -1973,6 +1973,12 @@ retry:
    if (class == ATA_DEV_ATA) {
    if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
    goto err_out;
    + if (ap->host->flags & ATA_HOST_IGNORE_ATA &&
    + ata_id_is_ata(id)) {
    + ata_dev_dbg(dev,
    + "host indicates ignore ATA devices, ignored\n");
    + return -ENOENT;
    + }
    } else {
    if (ata_id_is_ata(id))
    goto err_out;
    diff --git a/include/linux/libata.h b/include/linux/libata.h
    index 42378d6..198c8f1 100644
    --- a/include/linux/libata.h
    +++ b/include/linux/libata.h
    @@ -247,6 +247,7 @@ enum {
    ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
    ATA_HOST_STARTED = (1 << 1), /* Host started */
    ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
    + ATA_HOST_IGNORE_ATA = (1 << 3), /* Ignore ATA devices on this host. */

    /* bits 24:31 of host->flags are reserved for LLD specific flags */

    --
    1.7.9.5


    \
     
     \ /
      Last update: 2012-04-16 13:23    [W:0.022 / U:1.456 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site