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| author | Dan Williams <dan.j.williams@intel.com> | 2012-03-10 23:28:46 -0800 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2012-04-12 15:57:51 -0400 |
| commit | 85d6725b7c0d7e3fa4261fdd4c020be4224fc9f1 (patch) | |
| tree | 359e39a0982124c9f630ff3928aaf6f75d8b7dd3 /drivers/ata/libata-core.c | |
| parent | 99b80e97710ae2e53c951acfdd956e9f38e36646 (diff) | |
| download | linux-3.10-85d6725b7c0d7e3fa4261fdd4c020be4224fc9f1.tar.gz linux-3.10-85d6725b7c0d7e3fa4261fdd4c020be4224fc9f1.tar.bz2 linux-3.10-85d6725b7c0d7e3fa4261fdd4c020be4224fc9f1.zip | |
libata: make ata_print_id atomic
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>
Diffstat (limited to 'drivers/ata/libata-core.c')
| -rw-r--r-- | drivers/ata/libata-core.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index e0bda9ff89c..28db50b57b9 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -95,7 +95,7 @@ static unsigned int ata_dev_set_xfermode(struct ata_device *dev); static void ata_dev_xfermask(struct ata_device *dev); static unsigned long ata_dev_blacklisted(const struct ata_device *dev); -unsigned int ata_print_id = 1; +atomic_t ata_print_id = ATOMIC_INIT(1); struct ata_force_param { const char *name; @@ -6029,7 +6029,7 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) /* give ports names and add SCSI hosts */ for (i = 0; i < host->n_ports; i++) - host->ports[i]->print_id = ata_print_id++; + host->ports[i]->print_id = atomic_inc_return(&ata_print_id); /* Create associated sysfs transport objects */ |