[PATCH V3 for-next 03/11] IB/hns: Optimize the logic of allocating memory using APIs

[Salil Mehta]

From: "Wei Hu (Xavier)" <xavier.hu...@huawei.com>

This patch modified the logic of allocating memory using APIs in
hns RoCE driver. We used kcalloc instead of kmalloc_array and
bitmap_zero. And When kcalloc failed, call vzalloc to alloc
memory.

Signed-off-by: Wei Hu (Xavier) <xavier.hu...@huawei.com>
Signed-off-by: Ping Zhang <zhangpi...@huawei.com>
Signed-off-by: Salil Mehta  <salil.me...@huawei.com>
---
Change log:

PATCH V2: Addressed comment given by Leon
         Link: https://patchwork.kernel.org/patch/9412859/
PATCH V1: Initial Submit
---
 drivers/infiniband/hw/hns/hns_roce_mr.c |   16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/infiniband/hw/hns/hns_roce_mr.c 
b/drivers/infiniband/hw/hns/hns_roce_mr.c
index fb87883..d87d189 100644
--- a/drivers/infiniband/hw/hns/hns_roce_mr.c
+++ b/drivers/infiniband/hw/hns/hns_roce_mr.c
@@ -137,11 +137,13 @@ static int hns_roce_buddy_init(struct hns_roce_buddy 
*buddy, int max_order)
 
        for (i = 0; i <= buddy->max_order; ++i) {
                s = BITS_TO_LONGS(1 << (buddy->max_order - i));
-               buddy->bits[i] = kmalloc_array(s, sizeof(long), GFP_KERNEL);
-               if (!buddy->bits[i])
-                       goto err_out_free;
-
-               bitmap_zero(buddy->bits[i], 1 << (buddy->max_order - i));
+               buddy->bits[i] = kcalloc(s, sizeof(long), GFP_KERNEL |
+                                        __GFP_NOWARN);
+               if (!buddy->bits[i]) {
+                       buddy->bits[i] = vzalloc(s * sizeof(long));
+                       if (!buddy->bits[i])
+                               goto err_out_free;
+               }
        }
 
        set_bit(0, buddy->bits[buddy->max_order]);
@@ -151,7 +153,7 @@ static int hns_roce_buddy_init(struct hns_roce_buddy 
*buddy, int max_order)
 
 err_out_free:
        for (i = 0; i <= buddy->max_order; ++i)
-               kfree(buddy->bits[i]);
+               kvfree(buddy->bits[i]);
 
 err_out:
        kfree(buddy->bits);
@@ -164,7 +166,7 @@ static void hns_roce_buddy_cleanup(struct hns_roce_buddy 
*buddy)
        int i;
 
        for (i = 0; i <= buddy->max_order; ++i)
-               kfree(buddy->bits[i]);
+               kvfree(buddy->bits[i]);
 
        kfree(buddy->bits);
        kfree(buddy->num_free);
-- 
1.7.9.5