net: thunderx: check if memory allocation was successful

This fixes a coccinelle warning:

coccinelle warnings: (new ones prefixed by >>)

>> drivers/net/ethernet/cavium/thunder/nicvf_queues.c:360:1-11: alloc
>> with no test, possible model on line 367

vim +360 drivers/net/ethernet/cavium/thunder/nicvf_queues.c

   354		err = nicvf_alloc_q_desc_mem(nic, &sq->dmem, q_len,
SND_QUEUE_DESC_SIZE,
   355					     NICVF_SQ_BASE_ALIGN_BYTES);
   356		if (err)
   357			return err;
   358
   359		sq->desc = sq->dmem.base;
 > 360		sq->skbuff = kcalloc(q_len, sizeof(u64), GFP_ATOMIC);
   361		sq->head = 0;
   362		sq->tail = 0;
   363		atomic_set(&sq->free_cnt, q_len - 1);
   364		sq->thresh = SND_QUEUE_THRESH;
   365
   366		/* Preallocate memory for TSO segment's header */
 > 367		sq->tso_hdrs = dma_alloc_coherent(&nic->pdev->dev,
   368						  q_len *
TSO_HEADER_SIZE,
   369						  &sq->tso_hdrs_phys,
GFP_KERNEL);
   370		if (!sq->tso_hdrs)

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c
index 8929029613ca141dec12e560987d5d16a5acd54d..2ed7d1b7f7e8bca0d97c7b6420ae9a5d1d8ca866 100644 (file)
--- a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c
+++ b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c
@@ -357,6 +357,8 @@ static int nicvf_init_snd_queue(struct nicvf *nic,
 
        sq->desc = sq->dmem.base;
        sq->skbuff = kcalloc(q_len, sizeof(u64), GFP_ATOMIC);
+       if (!sq->skbuff)
+               return -ENOMEM;
        sq->head = 0;
        sq->tail = 0;
        atomic_set(&sq->free_cnt, q_len - 1);