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-rw-r--r--drivers/ata/libata-core.c6
-rw-r--r--include/linux/libata.h1
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 */