On Wed, Oct 03, 2012 at 10:51:35AM -0700, Yinghai Lu wrote:
> Need ixgbe guys to close the loop to use set_max_vfs instead
> kernel parameters.
>
> Signed-off-by: Yinghai Lu <ying...@kernel.org>
> Cc: Jeff Kirsher <jeffrey.t.kirs...@intel.com>
> Cc: Jesse Brandeburg <jesse.brandeb...@intel.com>
> Cc: Greg Rose <gregory.v.r...@intel.com>
> Cc: "David S. Miller" <da...@davemloft.net>
> Cc: John Fastabend <john.r.fastab...@intel.com>
> Cc: e1000-de...@lists.sourceforge.net
> Cc: net...@vger.kernel.org
> ---
> drivers/net/ethernet/intel/ixgbe/ixgbe.h | 2 +
> drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 44 +++++++++++++++++++-----
> 2 files changed, 37 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe.h
> b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
> index b9623e9..d39d975 100644
> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h
> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
> @@ -558,6 +558,8 @@ struct ixgbe_adapter {
> u32 interrupt_event;
> u32 led_reg;
>
> + struct ixgbe_info *ixgbe_info;
> +
> #ifdef CONFIG_IXGBE_PTP
> struct ptp_clock *ptp_clock;
> struct ptp_clock_info ptp_caps;
> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> index ee61819..1c097c7 100644
> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> @@ -129,13 +129,6 @@ static struct notifier_block dca_notifier = {
> };
> #endif
>
> -#ifdef CONFIG_PCI_IOV
> -static unsigned int max_vfs;
> -module_param(max_vfs, uint, 0);
> -MODULE_PARM_DESC(max_vfs,
> - "Maximum number of virtual functions to allocate per physical
> function - default is zero and maximum value is 63");
> -#endif /* CONFIG_PCI_IOV */
> -
> static unsigned int allow_unsupported_sfp;
> module_param(allow_unsupported_sfp, uint, 0);
> MODULE_PARM_DESC(allow_unsupported_sfp,
> @@ -4496,7 +4489,7 @@ static int __devinit ixgbe_sw_init(struct ixgbe_adapter
> *adapter)
> #ifdef CONFIG_PCI_IOV
> /* assign number of SR-IOV VFs */
> if (hw->mac.type != ixgbe_mac_82598EB)
> - adapter->num_vfs = (max_vfs > 63) ? 0 : max_vfs;
> + adapter->num_vfs = min_t(int, pdev->max_vfs, 63);
Could we make this min_t(uint, ...);
->max_vfs is type unsigned int. We take an unsigned long from sysfs.
We silently truncate it to an unsigned int. Then we cast it to a
negative number and compare against 63 and take the minimum...
It's root only so it's not a problem but it's a hassle to audit.
regards,
dan carpenter
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