diff options
| author | Harish Zunjarrao <harish.zunjarrao@qlogic.com> | 2010-05-04 15:01:24 -0700 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2010-05-16 18:21:42 -0400 |
| commit | 6a03b4cd78f3f2695a2d0e6343d555b3de0e67c1 (patch) | |
| tree | c86750452978aaadca184bbe39d1c969a3b776ab /drivers/scsi/qla2xxx/qla_os.c | |
| parent | 3e46f031322bdd8d1f11e17fb7cf00c38b08dd55 (diff) | |
[SCSI] qla2xxx: Add char device to increase driver use count
The driver should not be unloaded if any application is using it.
To disallow driver unload, driver use count must be incremented.
Application uses this char device as handle and increases driver
use count to avoid possible driver unload.
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/qla2xxx/qla_os.c')
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_os.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c index f2102db0316..10c14af2235 100644 --- a/drivers/scsi/qla2xxx/qla_os.c +++ b/drivers/scsi/qla2xxx/qla_os.c @@ -24,6 +24,8 @@ */ char qla2x00_version_str[40]; +static int apidev_major; + /* * SRB allocation cache */ @@ -3763,6 +3765,10 @@ static struct pci_driver qla2xxx_pci_driver = { .err_handler = &qla2xxx_err_handler, }; +static struct file_operations apidev_fops = { + .owner = THIS_MODULE, +}; + /** * qla2x00_module_init - Module initialization. **/ @@ -3791,6 +3797,13 @@ qla2x00_module_init(void) kmem_cache_destroy(srb_cachep); return -ENODEV; } + + apidev_major = register_chrdev(0, QLA2XXX_APIDEV, &apidev_fops); + if (apidev_major < 0) { + printk(KERN_WARNING "qla2xxx: Unable to register char device " + "%s\n", QLA2XXX_APIDEV); + } + qla2xxx_transport_vport_template = fc_attach_transport(&qla2xxx_transport_vport_functions); if (!qla2xxx_transport_vport_template) { @@ -3816,6 +3829,7 @@ qla2x00_module_init(void) static void __exit qla2x00_module_exit(void) { + unregister_chrdev(apidev_major, QLA2XXX_APIDEV); pci_unregister_driver(&qla2xxx_pci_driver); qla2x00_release_firmware(); kmem_cache_destroy(srb_cachep); |