Commit fa853a48 authored by Arjan van de Ven's avatar Arjan van de Ven Committed by Linus Torvalds
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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: default avatarArjan van de Ven <>
Signed-off-by: default avatarLinus Torvalds <>
parent 886ad09f
......@@ -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)
/* probe */
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