From fa853a48413c2ca1a5dc6b539bf07cf8e7247f8e Mon Sep 17 00:00:00 2001 From: Arjan van de Ven <arjan@linux.intel.com> Date: Sat, 10 Jan 2009 10:18:44 -0800 Subject: [PATCH] libata: only ports >= 0 need to synchronize In a discussio with Jeff Garzik, he mentioned that the serialization for the libata port probes only needs to be within the domain of a host. This means that for the first port of each host (with ID 0), we don't need to wait, so we can relax our serialization a little. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> --- drivers/ata/libata-core.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index f810078fafcc..71218d76d75e 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -5925,8 +5925,10 @@ static void async_port_probe(void *data, async_cookie_t cookie) * If we're not allowed to scan this host in parallel, * we need to wait until all previous scans have completed * before going further. + * Jeff Garzik says this is only within a controller, so we + * don't need to wait for port 0, only for later ports. */ - if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN)) + if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0) async_synchronize_cookie(cookie); /* probe */ -- GitLab