From d160147b5c96ef5ec842c604ccd79f5f03306677 Mon Sep 17 00:00:00 2001
From: Wenwei Tao <ww.tao0320@gmail.com>
Date: Sat, 28 Nov 2015 16:49:25 +0100
Subject: [PATCH] lightnvm: do device max sectors boundary check first
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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>
---
 drivers/lightnvm/core.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index ea50fa5b6ba6d..ea6dba530f0a8 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);