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lightnvm: refactor spin_unlock in gennvm_get_blk

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The spin_unlock is duplicated multiple times. Jump to a single unlock
to improve the code flow.

Signed-off-by: Wenwei Tao <ww.tao0320@gmail.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Wenwei Tao 2015-12-06 11:25:45 +01:00 committed by Jens Axboe
parent d3d1a43842
commit e9b76a80f1
1 changed files with 2 additions and 5 deletions
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7
drivers/lightnvm/gennvm.c
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@ -262,14 +262,11 @@ static struct nvm_block *gennvm_get_blk(struct nvm_dev *dev,
if (list_empty(&lun->free_list)) {
pr_err_ratelimited("gennvm: lun %u have no free pages available",
lun->vlun.id);
spin_unlock(&vlun->lock);
goto out;
}
while (!is_gc && lun->vlun.nr_free_blocks < lun->reserved_blocks) {
spin_unlock(&vlun->lock);
if (!is_gc && lun->vlun.nr_free_blocks < lun->reserved_blocks)
goto out;
}
blk = list_first_entry(&lun->free_list, struct nvm_block, list);
list_move_tail(&blk->list, &lun->used_list);
@ -278,8 +275,8 @@ static struct nvm_block *gennvm_get_blk(struct nvm_dev *dev,
lun->vlun.nr_free_blocks--;
lun->vlun.nr_inuse_blocks++;
spin_unlock(&vlun->lock);
out:
spin_unlock(&vlun->lock);
return blk;
}