From 886ad09fc83342aa1c5a02a0b6d3298b78a8067f Mon Sep 17 00:00:00 2001 From: Arjan van de Ven Date: Fri, 9 Jan 2009 15:54:07 -0800 Subject: libata: Add a per-host flag to opt-in into parallel port probes 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 Signed-off-by: Linus Torvalds --- drivers/ata/libata-core.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'drivers/ata/libata-core.c') diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index c507a9ac78f..f810078fafc 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -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; -- cgit v1.2.3