netdev - RE: [PATCH net-next 2/2] qlcnic: Use pci_enable_msix_exact() instead of pci_enable

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Date:	Fri, 25 Apr 2014 08:48:14 +0000
From:	Shahed Shaikh <shahed.shaikh@...gic.com>
To:	Alexander Gordeev <agordeev@...hat.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
CC:	Dept-HSG Linux NIC Dev <Dept-HSGLinuxNICDev@...gic.com>,
	netdev <netdev@...r.kernel.org>,
	linux-pci <linux-pci@...r.kernel.org>
Subject: RE: [PATCH net-next 2/2] qlcnic: Use pci_enable_msix_exact()
 instead of pci_enable_msix()

> -----Original Message-----
> From: Alexander Gordeev [mailto:agordeev@...hat.com]
> Sent: Friday, April 25, 2014 1:36 PM
> To: linux-kernel
> Cc: Alexander Gordeev; Shahed Shaikh; Dept-HSG Linux NIC Dev; netdev;
> linux-pci
> Subject: [PATCH net-next 2/2] qlcnic: Use pci_enable_msix_exact() instead
> of pci_enable_msix()
> 
> As result of deprecation of MSI-X/MSI enablement functions
> pci_enable_msix() and pci_enable_msi_block() all drivers using these two
> interfaces need to be updated to use the new pci_enable_msi_range()  or
> pci_enable_msi_exact() and pci_enable_msix_range() or
> pci_enable_msix_exact() interfaces.
> 
> Cc: Shahed Shaikh <shahed.shaikh@...gic.com>
> Cc: Dept-HSGLinuxNICDev@...gic.com
> Cc: netdev@...r.kernel.org
> Cc: linux-pci@...r.kernel.org
> 
> Signed-off-by: Alexander Gordeev <agordeev@...hat.com>
> ---
>  drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c |    4 ++--
>  1 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
> b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
> index dbf7539..26f022b 100644
> --- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
> +++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
> @@ -690,8 +690,8 @@ int qlcnic_setup_tss_rss_intr(struct qlcnic_adapter
> *adapter)
>  		adapter->msix_entries[vector].entry = vector;
> 
>  restore:
> -	err = pci_enable_msix(pdev, adapter->msix_entries, num_msix);
> -	if (err > 0) {
> +	err = pci_enable_msix_exact(pdev, adapter->msix_entries,
> num_msix);
> +	if (err == -ENOSPC) {
>  		if (!adapter->drv_tss_rings && !adapter->drv_rss_rings)
>  			return -ENOSPC;

I think, it would be good if we return "err" instead of "-ENOSPC" .
  
                if (!adapter->drv_tss_rings && !adapter->drv_rss_rings)
-                       return -ENOSPC;
+                       return err;

Thanks,
Shahed

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