diff options
| -rw-r--r-- | mm/backing-dev.c | 30 |
1 files changed, 11 insertions, 19 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c index 9008c4e207f6..0b8ee66993dd 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c | |||
| @@ -511,23 +511,16 @@ int bdi_register(struct backing_dev_info *bdi, struct device *parent, | |||
| 511 | const char *fmt, ...) | 511 | const char *fmt, ...) |
| 512 | { | 512 | { |
| 513 | va_list args; | 513 | va_list args; |
| 514 | int ret = 0; | ||
| 515 | struct device *dev; | 514 | struct device *dev; |
| 516 | 515 | ||
| 517 | if (bdi->dev) /* The driver needs to use separate queues per device */ | 516 | if (bdi->dev) /* The driver needs to use separate queues per device */ |
| 518 | goto exit; | 517 | return 0; |
| 519 | 518 | ||
| 520 | va_start(args, fmt); | 519 | va_start(args, fmt); |
| 521 | dev = device_create_vargs(bdi_class, parent, MKDEV(0, 0), bdi, fmt, args); | 520 | dev = device_create_vargs(bdi_class, parent, MKDEV(0, 0), bdi, fmt, args); |
| 522 | va_end(args); | 521 | va_end(args); |
| 523 | if (IS_ERR(dev)) { | 522 | if (IS_ERR(dev)) |
| 524 | ret = PTR_ERR(dev); | 523 | return PTR_ERR(dev); |
| 525 | goto exit; | ||
| 526 | } | ||
| 527 | |||
| 528 | spin_lock_bh(&bdi_lock); | ||
| 529 | list_add_tail_rcu(&bdi->bdi_list, &bdi_list); | ||
| 530 | spin_unlock_bh(&bdi_lock); | ||
| 531 | 524 | ||
| 532 | bdi->dev = dev; | 525 | bdi->dev = dev; |
| 533 | 526 | ||
| @@ -541,20 +534,19 @@ int bdi_register(struct backing_dev_info *bdi, struct device *parent, | |||
| 541 | 534 | ||
| 542 | wb->task = kthread_run(bdi_forker_thread, wb, "bdi-%s", | 535 | wb->task = kthread_run(bdi_forker_thread, wb, "bdi-%s", |
| 543 | dev_name(dev)); | 536 | dev_name(dev)); |
| 544 | if (IS_ERR(wb->task)) { | 537 | if (IS_ERR(wb->task)) |
| 545 | wb->task = NULL; | 538 | return PTR_ERR(wb->task); |
| 546 | ret = -ENOMEM; | ||
| 547 | |||
| 548 | bdi_remove_from_list(bdi); | ||
| 549 | goto exit; | ||
| 550 | } | ||
| 551 | } | 539 | } |
| 552 | 540 | ||
| 553 | bdi_debug_register(bdi, dev_name(dev)); | 541 | bdi_debug_register(bdi, dev_name(dev)); |
| 554 | set_bit(BDI_registered, &bdi->state); | 542 | set_bit(BDI_registered, &bdi->state); |
| 543 | |||
| 544 | spin_lock_bh(&bdi_lock); | ||
| 545 | list_add_tail_rcu(&bdi->bdi_list, &bdi_list); | ||
| 546 | spin_unlock_bh(&bdi_lock); | ||
| 547 | |||
| 555 | trace_writeback_bdi_register(bdi); | 548 | trace_writeback_bdi_register(bdi); |
| 556 | exit: | 549 | return 0; |
| 557 | return ret; | ||
| 558 | } | 550 | } |
| 559 | EXPORT_SYMBOL(bdi_register); | 551 | EXPORT_SYMBOL(bdi_register); |
| 560 | 552 | ||
