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libata: Add a per-host flag to opt-in into parallel port probes

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This patch adds a per host flag that allows drivers to opt in into
having its busses scanned in parallel.

Drivers that do not set this flag get their ports scanned in
the "original" sequence.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Arjan van de Ven
2009-01-09 15:54:07 -08:00
committed by Linus Torvalds
parent 3d14bdad40
commit 886ad09fc8
3 changed files with 13 additions and 0 deletions
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9
drivers/ata/libata-core.c
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@ -5920,6 +5920,15 @@ static void async_port_probe(void *data, async_cookie_t cookie)
{
int rc;
struct ata_port *ap = data;
/*
* If we're not allowed to scan this host in parallel,
* we need to wait until all previous scans have completed
* before going further.
*/
if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN))
async_synchronize_cookie(cookie);
/* probe */
if (ap->ops->error_handler) {
struct ata_eh_info *ehi = &ap->link.eh_info;