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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>
This commit is contained in:
Aleksey Makarov 2015-06-02 11:00:26 -07:00 committed by David S. Miller
parent 39a0dd0b5e
commit fa1a6c93af
1 changed files with 2 additions and 0 deletions
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2
drivers/net/ethernet/cavium/thunder/nicvf_queues.c
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@ -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);