lightnvm: do device max sectors boundary check first

do device max_phys_sect boundary check first, otherwise
we will allocate dma_pools for devices whose max sectors
are beyond lightnvm support and register them.

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>

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index ea50fa5..ea6dba5 100644 (file)
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -308,6 +308,12 @@ int nvm_register(struct request_queue *q, char *disk_name,
        if (ret)
                goto err_init;
 
+       if (dev->ops->max_phys_sect > 256) {
+               pr_info("nvm: max sectors supported is 256.\n");
+               ret = -EINVAL;
+               goto err_init;
+       }
+
        if (dev->ops->max_phys_sect > 1) {
                dev->ppalist_pool = dev->ops->create_dma_pool(dev->q,
                                                                "ppalist");
@@ -316,10 +322,6 @@ int nvm_register(struct request_queue *q, char *disk_name,
                        ret = -ENOMEM;
                        goto err_init;
                }
-       } else if (dev->ops->max_phys_sect > 256) {
-               pr_info("nvm: max sectors supported is 256.\n");
-               ret = -EINVAL;
-               goto err_init;
        }
 
        down_write(&nvm_lock);