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Commit db63a4c8 authored by Andy Whitcroft's avatar Andy Whitcroft Committed by Jeff Garzik
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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: default avatarAndy Whitcroft <apw@canonical.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
parent d48b97b4

drivers/ata/libata-core.c

+6 −0
Original line number Diff line number Diff line
@@ -1973,6 +1973,12 @@ int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, 
	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;

include/linux/libata.h

+1 −0
Original line number Diff line number Diff line
@@ -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 */