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>

1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index ea50fa5b6ba6..ea6dba530f0a 100644
--- 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);