From mboxrd@z Thu Jan 1 00:00:00 1970 From: Govindarajulu Varadarajan Subject: [PATCH net v2] enic: set DMA mask to 47 bit Date: Wed, 23 May 2018 11:17:39 -0700 Message-ID: <20180523181739.1347-1-gvaradar@cisco.com> Cc: benve@cisco.com, Govindarajulu Varadarajan To: davem@davemloft.net, netdev@vger.kernel.org Return-path: Received: from alln-iport-1.cisco.com ([173.37.142.88]:37141 "EHLO alln-iport-1.cisco.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935109AbeEXB1s (ORCPT ); Wed, 23 May 2018 21:27:48 -0400 Sender: netdev-owner@vger.kernel.org List-ID: In commit 624dbf55a359b ("driver/net: enic: Try DMA 64 first, then failover to DMA") DMA mask was changed from 40 bits to 64 bits. Hardware actually supports only 47 bits. Fixes: 624dbf55a359b ("driver/net: enic: Try DMA 64 first, then failover to DMA") Signed-off-by: Govindarajulu Varadarajan --- v2: * rebase to net * Fix space and single line for "Fixes:" drivers/net/ethernet/cisco/enic/enic_main.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c index 81684acf52af..8a8b12b720ef 100644 --- a/drivers/net/ethernet/cisco/enic/enic_main.c +++ b/drivers/net/ethernet/cisco/enic/enic_main.c @@ -2747,11 +2747,11 @@ static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) pci_set_master(pdev); /* Query PCI controller on system for DMA addressing - * limitation for the device. Try 64-bit first, and + * limitation for the device. Try 47-bit first, and * fail to 32-bit. */ - err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); + err = pci_set_dma_mask(pdev, DMA_BIT_MASK(47)); if (err) { err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); if (err) { @@ -2765,10 +2765,10 @@ static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) goto err_out_release_regions; } } else { - err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); + err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(47)); if (err) { dev_err(dev, "Unable to obtain %u-bit DMA " - "for consistent allocations, aborting\n", 64); + "for consistent allocations, aborting\n", 47); goto err_out_release_regions; } using_dac = 1; -- 2.17.0