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Commit fa853a48 authored by Arjan van de Ven's avatar Arjan van de Ven Committed by Linus Torvalds
Browse files

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 <arjan@linux.intel.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 886ad09f

drivers/ata/libata-core.c

+3 −1
Original line number Diff line number Diff line
@@ -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 */