linux-kernel - RE: [EXT] [PATCH] qed: Prefer pcie_capability_read

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Message-ID: <MN2PR18MB31827E4CEAA1FDE1C395332FA1C80@MN2PR18MB3182.namprd18.prod.outlook.com>
Date:   Thu, 18 Jul 2019 08:22:00 +0000
From:   Michal Kalderon <mkalderon@...vell.com>
To:     Frederick Lawler <fred@...dlawl.com>,
        Ariel Elior <aelior@...vell.com>,
        GR-everest-linux-l2 <GR-everest-linux-l2@...vell.com>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>
Subject: RE: [EXT] [PATCH] qed: Prefer pcie_capability_read_word()

> From: Frederick Lawler <fred@...dlawl.com>
> Sent: Thursday, July 18, 2019 5:08 AM
> 
> External Email
> 
> ----------------------------------------------------------------------
> Commit 8c0d3a02c130 ("PCI: Add accessors for PCI Express Capability") added
> accessors for the PCI Express Capability so that drivers didn't need to be
> aware of differences between v1 and v2 of the PCI Express Capability.
> 
> Replace pci_read_config_word() and pci_write_config_word() calls with
> pcie_capability_read_word() and pcie_capability_write_word().
> 
> Signed-off-by: Frederick Lawler <fred@...dlawl.com>
> ---
>  drivers/net/ethernet/qlogic/qed/qed_rdma.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/ethernet/qlogic/qed/qed_rdma.c
> b/drivers/net/ethernet/qlogic/qed/qed_rdma.c
> index 7873d6dfd91f..8d8a920c3195 100644
> --- a/drivers/net/ethernet/qlogic/qed/qed_rdma.c
> +++ b/drivers/net/ethernet/qlogic/qed/qed_rdma.c
> @@ -530,9 +530,8 @@ static void qed_rdma_init_devinfo(struct qed_hwfn
> *p_hwfn,
>  	SET_FIELD(dev->dev_caps,
> QED_RDMA_DEV_CAP_LOCAL_INV_FENCE, 1);
> 
>  	/* Check atomic operations support in PCI configuration space. */
> -	pci_read_config_dword(cdev->pdev,
> -			      cdev->pdev->pcie_cap + PCI_EXP_DEVCTL2,
> -			      &pci_status_control);
> +	pcie_capability_read_dword(cdev->pdev, PCI_EXP_DEVCTL2,
> +				   &pci_status_control);
> 
>  	if (pci_status_control & PCI_EXP_DEVCTL2_LTR_EN)
>  		SET_FIELD(dev->dev_caps,
> QED_RDMA_DEV_CAP_ATOMIC_OP, 1);
> --
> 2.17.1

Thanks, 

Acked-by: Michal Kalderon <michal.kalderon@...vell.com>