diff options
| author | Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> | 2013-11-05 12:37:02 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2013-11-08 09:10:30 -0700 |
| commit | b8df6647c248db457f1c2fb4f0f6350beaf16f9e (patch) | |
| tree | abe07e5b81ddf74d9f48eec03995a3524001713a /drivers | |
| parent | fbed149ab328b72f501a3344ab4f20f712c63392 (diff) | |
skd: register block device only if some devices are present
Register block device in skd_pci_probe() instead of in skd_init() so it
is registered only if some devices are present (currently it is always
registered when the driver is loaded). Please note that this change
depends on the fact that register_blkdev(0, ...) never returns 0.
Cc: Akhil Bhansali <abhansali@stec-inc.com>
Cc: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/block/skd_main.c | 33 |
1 files changed, 12 insertions, 21 deletions
diff --git a/drivers/block/skd_main.c b/drivers/block/skd_main.c index 99d5d1251c45..9ff34be89f99 100644 --- a/drivers/block/skd_main.c +++ b/drivers/block/skd_main.c @@ -4899,6 +4899,14 @@ static int skd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) } } + if (!skd_major) { + rc = register_blkdev(0, DRV_NAME); + if (rc < 0) + goto err_out_regions; + BUG_ON(!rc); + skd_major = rc; + } + skdev = skd_construct(pdev); if (skdev == NULL) { rc = -ENOMEM; @@ -5396,8 +5404,6 @@ static void skd_log_skreq(struct skd_device *skdev, static int __init skd_init(void) { - int rc = -ENOMEM; - pr_info(PFX " v%s-b%s loaded\n", DRV_VERSION, DRV_BUILD_ID); switch (skd_isr_type) { @@ -5448,24 +5454,7 @@ static int __init skd_init(void) skd_max_pass_thru = SKD_N_SPECIAL_CONTEXT; } - /* Obtain major device number. */ - rc = register_blkdev(0, DRV_NAME); - if (rc < 0) - goto err_register_blkdev; - - skd_major = rc; - - rc = pci_register_driver(&skd_driver); - if (rc < 0) - goto err_pci_register_driver; - - return rc; - -err_pci_register_driver: - unregister_blkdev(skd_major, DRV_NAME); - -err_register_blkdev: - return rc; + return pci_register_driver(&skd_driver); } static void __exit skd_exit(void) @@ -5473,7 +5462,9 @@ static void __exit skd_exit(void) pr_info(PFX " v%s-b%s unloading\n", DRV_VERSION, DRV_BUILD_ID); pci_unregister_driver(&skd_driver); - unregister_blkdev(skd_major, DRV_NAME); + + if (skd_major) + unregister_blkdev(skd_major, DRV_NAME); } module_init(skd_init); |