net/ena: fix queues number calculation

Netanel Belgazal · davem330 · commit 6a1ce2fb6716 · 2017-02-09T22:27:06.000-05:00
The ENA driver tries to open a queue per vCPU.
To determine how many vCPUs the instance have it uses num_possible_cpus()
while it should have use num_online_cpus() instead.

Signed-off-by: Netanel Belgazal &lt;netanel@annapurnalabs.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -2658,7 +2658,7 @@ static int ena_calc_io_queue_num(struct pci_dev *pdev,
 		io_sq_num = get_feat_ctx->max_queues.max_sq_num;
 	}
 
-	io_queue_num = min_t(int, num_possible_cpus(), ENA_MAX_NUM_IO_QUEUES);
+	io_queue_num = min_t(int, num_online_cpus(), ENA_MAX_NUM_IO_QUEUES);
 	io_queue_num = min_t(int, io_queue_num, io_sq_num);
 	io_queue_num = min_t(int, io_queue_num,
 			     get_feat_ctx->max_queues.max_cq_num);

Original file line number	Diff line number	Diff line change
`@@ -2658,7 +2658,7 @@ static int ena_calc_io_queue_num(struct pci_dev *pdev,`
`2658`	`2658`	`io_sq_num = get_feat_ctx->max_queues.max_sq_num;`
`2659`	`2659`	`}`
`2660`	`2660`
`2661`		`- io_queue_num = min_t(int, num_possible_cpus(), ENA_MAX_NUM_IO_QUEUES);`
	`2661`	`+ io_queue_num = min_t(int, num_online_cpus(), ENA_MAX_NUM_IO_QUEUES);`
`2662`	`2662`	`io_queue_num = min_t(int, io_queue_num, io_sq_num);`
`2663`	`2663`	`io_queue_num = min_t(int, io_queue_num,`
`2664`	`2664`	`get_feat_ctx->max_queues.max_cq_num);`