1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index c507a9ac78f4..71218d76d75e 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5920,6 +5920,17 @@ 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.
+         * 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) && ap->port_no != 0)
+                async_synchronize_cookie(cookie);
+
         /* probe */
         if (ap->ops->error_handler) {
                 struct ata_eh_info *ehi = &ap->link.eh_info;