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xen-blkback: allow module to be cleanly unloaded

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Add a module_exit() to perform the necessary clean-up.

Signed-off-by: Paul Durrant <pdurrant@amazon.com>
Reviewed-by: "Roger Pau Monné" <roger.pau@citrix.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
This commit is contained in:
Paul Durrant 2019-12-02 11:41:17 +00:00 committed by Juergen Gross
parent 196748a276
commit 14855954f6
3 changed files with 22 additions and 0 deletions
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8
drivers/block/xen-blkback/blkback.c
View File

@ -1504,5 +1504,13 @@ static int __init xen_blkif_init(void)
module_init(xen_blkif_init); module_init(xen_blkif_init);
static void __exit xen_blkif_fini(void)
{
xen_blkif_xenbus_fini();
xen_blkif_interface_fini();
}
module_exit(xen_blkif_fini);
MODULE_LICENSE("Dual BSD/GPL"); MODULE_LICENSE("Dual BSD/GPL");
MODULE_ALIAS("xen-backend:vbd"); MODULE_ALIAS("xen-backend:vbd");

3
drivers/block/xen-blkback/common.h
View File

@ -375,9 +375,12 @@ struct phys_req {
struct block_device *bdev; struct block_device *bdev;
blkif_sector_t sector_number; blkif_sector_t sector_number;
}; };
int xen_blkif_interface_init(void); int xen_blkif_interface_init(void);
void xen_blkif_interface_fini(void);
int xen_blkif_xenbus_init(void); int xen_blkif_xenbus_init(void);
void xen_blkif_xenbus_fini(void);
irqreturn_t xen_blkif_be_int(int irq, void *dev_id); irqreturn_t xen_blkif_be_int(int irq, void *dev_id);
int xen_blkif_schedule(void *arg); int xen_blkif_schedule(void *arg);

11
drivers/block/xen-blkback/xenbus.c
View File

@ -333,6 +333,12 @@ int __init xen_blkif_interface_init(void)
return 0; return 0;
} }
void xen_blkif_interface_fini(void)
{
kmem_cache_destroy(xen_blkif_cachep);
xen_blkif_cachep = NULL;
}
/* /*
* sysfs interface for VBD I/O requests * sysfs interface for VBD I/O requests
*/ */
@ -1122,3 +1128,8 @@ int xen_blkif_xenbus_init(void)
{ {
return xenbus_register_backend(&xen_blkbk_driver); return xenbus_register_backend(&xen_blkbk_driver);
} }
void xen_blkif_xenbus_fini(void)
{
xenbus_unregister_driver(&xen_blkbk_driver);
}