atl1c: Improve driver not to do order 4 GFP_ATOMIC allocation

[ Upstream commit f2a3771ae8aca879c32336c76ad05a017629bae2 ]

atl1c driver is doing order-4 allocation with GFP_ATOMIC
priority. That often breaks  networking after resume. Switch to
GFP_KERNEL. Still not ideal, but should be significantly better.

atl1c_setup_ring_resources() is called from .open() function, and
already uses GFP_KERNEL, so this change is safe.

Signed-off-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
index 5ae7df74d09b86aa99cec34526e5d368412c6b52..790f643366f4ccaa8fa51ca39cae875b20e5d6a1 100644 (file)
--- a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
+++ b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
@@ -981,13 +981,12 @@ static int atl1c_setup_ring_resources(struct atl1c_adapter *adapter)
                sizeof(struct atl1c_hw_stats) +
                8 * 4 + 8 * 2 * num_rx_queues;
 
-       ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
-                               &ring_header->dma);
+       ring_header->desc = dma_zalloc_coherent(&pdev->dev, ring_header->size,
+                                               &ring_header->dma, GFP_KERNEL);
        if (unlikely(!ring_header->desc)) {
-               dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
+               dev_err(&pdev->dev, "could not get memory for DMA buffer\n");
                goto err_nomem;
        }
-       memset(ring_header->desc, 0, ring_header->size);
        /* init TPD ring */
 
        tpd_ring[0].dma = roundup(ring_header->dma, 8);