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libata: make ata_print_id atomic

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This variable is incremented from multiple contexts (module_init via
libata-lldds and the libsas discovery thread).  Make it atomic to head
off any chance of libsas and libata creating duplicate ids.

Acked-by: Jacek Danecki <jacek.danecki@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Dan Williams
2012-03-10 23:28:46 -08:00
committed by Jeff Garzik
parent 99b80e9771
commit 85d6725b7c
3 changed files with 5 additions and 5 deletions
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4
drivers/ata/libata-scsi.c
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@@ -3843,7 +3843,7 @@ int ata_sas_async_port_init(struct ata_port *ap)
int rc = ap->ops->port_start(ap);
if (!rc) {
ap->print_id = ata_print_id++;
ap->print_id = atomic_inc_return(&ata_print_id);
__ata_port_probe(ap);
}
@@ -3867,7 +3867,7 @@ int ata_sas_port_init(struct ata_port *ap)
int rc = ap->ops->port_start(ap);
if (!rc) {
ap->print_id = ata_print_id++;
ap->print_id = atomic_inc_return(&ata_print_id);
rc = ata_port_probe(ap);
}