diff options
| author | Andy Whitcroft <apw@canonical.com> | 2012-05-04 22:15:10 +0100 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2012-05-07 15:32:23 -0400 |
| commit | db63a4c8115a0bb904496e1cdd3e7488e68b0d06 (patch) | |
| tree | 326448b28bf8de7c6205ed9e598070111e8a5020 | |
| parent | d48b97b403d23f6df0b990cee652bdf9a52337a3 (diff) | |
| download | lwn-db63a4c8115a0bb904496e1cdd3e7488e68b0d06.tar.gz lwn-db63a4c8115a0bb904496e1cdd3e7488e68b0d06.zip | |
libata: add a host flag to ignore detected ATA devices
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>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| -rw-r--r-- | drivers/ata/libata-core.c | 6 | ||||
| -rw-r--r-- | include/linux/libata.h | 1 |
2 files changed, 7 insertions, 0 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 23763a1ec570..d31ee557b395 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 e926df7b54c9..6e887c742a27 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 */ |