50 lines
1.7 KiB
Diff
50 lines
1.7 KiB
Diff
From: Andy Whitcroft <apw@canonical.com>
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Date: Fri, 4 May 2012 22:15:10 +0100
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Subject: [PATCH 78/79] libata: add a host flag to ignore detected ATA devices
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commit db63a4c8115a0bb904496e1cdd3e7488e68b0d06 upstream.
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Where devices are visible via more than one host we sometimes wish to
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indicate that cirtain devices should be ignored on a specific host. Add a
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host flag indicating that this host wishes to ignore ATA specific devices.
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Signed-off-by: Andy Whitcroft <apw@canonical.com>
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Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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---
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drivers/ata/libata-core.c | 6 ++++++
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include/linux/libata.h | 1 +
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2 files changed, 7 insertions(+)
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diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
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index 23763a1..d31ee55 100644
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--- a/drivers/ata/libata-core.c
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+++ b/drivers/ata/libata-core.c
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@@ -1973,6 +1973,12 @@ retry:
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if (class == ATA_DEV_ATA) {
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if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
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goto err_out;
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+ if (ap->host->flags & ATA_HOST_IGNORE_ATA &&
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+ ata_id_is_ata(id)) {
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+ ata_dev_dbg(dev,
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+ "host indicates ignore ATA devices, ignored\n");
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+ return -ENOENT;
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+ }
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} else {
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if (ata_id_is_ata(id))
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goto err_out;
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diff --git a/include/linux/libata.h b/include/linux/libata.h
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index e926df7..6e887c7 100644
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--- a/include/linux/libata.h
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+++ b/include/linux/libata.h
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@@ -247,6 +247,7 @@ enum {
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ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
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ATA_HOST_STARTED = (1 << 1), /* Host started */
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ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
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+ ATA_HOST_IGNORE_ATA = (1 << 3), /* Ignore ATA devices on this host. */
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/* bits 24:31 of host->flags are reserved for LLD specific flags */
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--
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1.7.10
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