3.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Andy Whitcroft <a...@canonical.com>
commit db63a4c8115a0bb904496e1cdd3e7488e68b0d06 upstream.
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 <a...@canonical.com>
Signed-off-by: Jeff Garzik <jgar...@redhat.com>
Cc: Victor Miasnikov <v...@tut.by>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/ata/libata-core.c | 6 ++++++
include/linux/libata.h | 1 +
2 files changed, 7 insertions(+)
--- 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;
--- 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 */
--
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