aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/scsi
diff options
context:
space:
mode:
authorHarish Zunjarrao <harish.zunjarrao@qlogic.com>2010-05-04 18:01:24 -0400
committerJames Bottomley <James.Bottomley@suse.de>2010-05-16 18:21:42 -0400
commit6a03b4cd78f3f2695a2d0e6343d555b3de0e67c1 (patch)
treec86750452978aaadca184bbe39d1c969a3b776ab /drivers/scsi
parent3e46f031322bdd8d1f11e17fb7cf00c38b08dd55 (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')
-rw-r--r--drivers/scsi/qla2xxx/qla_def.h3
-rw-r--r--drivers/scsi/qla2xxx/qla_os.c14
2 files changed, 16 insertions, 1 deletions
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index edb7a704ed77..d4a53e5549b9 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -35,7 +35,8 @@
35 35
36#include "qla_bsg.h" 36#include "qla_bsg.h"
37#include "qla_nx.h" 37#include "qla_nx.h"
38#define QLA2XXX_DRIVER_NAME "qla2xxx" 38#define QLA2XXX_DRIVER_NAME "qla2xxx"
39#define QLA2XXX_APIDEV "ql2xapidev"
39 40
40/* 41/*
41 * We have MAILBOX_REGISTER_COUNT sized arrays in a few places, 42 * We have MAILBOX_REGISTER_COUNT sized arrays in a few places,
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index f2102db03160..10c14af2235b 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -24,6 +24,8 @@
24 */ 24 */
25char qla2x00_version_str[40]; 25char qla2x00_version_str[40];
26 26
27static int apidev_major;
28
27/* 29/*
28 * SRB allocation cache 30 * SRB allocation cache
29 */ 31 */
@@ -3763,6 +3765,10 @@ static struct pci_driver qla2xxx_pci_driver = {
3763 .err_handler = &qla2xxx_err_handler, 3765 .err_handler = &qla2xxx_err_handler,
3764}; 3766};
3765 3767
3768static struct file_operations apidev_fops = {
3769 .owner = THIS_MODULE,
3770};
3771
3766/** 3772/**
3767 * qla2x00_module_init - Module initialization. 3773 * qla2x00_module_init - Module initialization.
3768 **/ 3774 **/
@@ -3791,6 +3797,13 @@ qla2x00_module_init(void)
3791 kmem_cache_destroy(srb_cachep); 3797 kmem_cache_destroy(srb_cachep);
3792 return -ENODEV; 3798 return -ENODEV;
3793 } 3799 }
3800
3801 apidev_major = register_chrdev(0, QLA2XXX_APIDEV, &apidev_fops);
3802 if (apidev_major < 0) {
3803 printk(KERN_WARNING "qla2xxx: Unable to register char device "
3804 "%s\n", QLA2XXX_APIDEV);
3805 }
3806
3794 qla2xxx_transport_vport_template = 3807 qla2xxx_transport_vport_template =
3795 fc_attach_transport(&qla2xxx_transport_vport_functions); 3808 fc_attach_transport(&qla2xxx_transport_vport_functions);
3796 if (!qla2xxx_transport_vport_template) { 3809 if (!qla2xxx_transport_vport_template) {
@@ -3816,6 +3829,7 @@ qla2x00_module_init(void)
3816static void __exit 3829static void __exit
3817qla2x00_module_exit(void) 3830qla2x00_module_exit(void)
3818{ 3831{
3832 unregister_chrdev(apidev_major, QLA2XXX_APIDEV);
3819 pci_unregister_driver(&qla2xxx_pci_driver); 3833 pci_unregister_driver(&qla2xxx_pci_driver);
3820 qla2x00_release_firmware(); 3834 qla2x00_release_firmware();
3821 kmem_cache_destroy(srb_cachep); 3835 kmem_cache_destroy(srb_cachep);