> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@xxxxxxxxxx> On Behalf Of
> Björn Töpel
> Sent: Friday, June 12, 2020 4:48 AM
> To: intel-wired-lan@xxxxxxxxxxxxxxxx
> Cc: netdev@xxxxxxxxxxxxxxx; bpf@xxxxxxxxxxxxxxx; Topel, Bjorn
> <bjorn.topel@xxxxxxxxx>; Karlsson, Magnus <magnus.karlsson@xxxxxxxxx>
> Subject: [Intel-wired-lan] [PATCH net] i40e: fix crash when Rx descriptor
> count is changed
>
> From: Björn Töpel <bjorn.topel@xxxxxxxxx>
>
> When the AF_XDP buffer allocator was introduced, the Rx SW ring "rx_bi"
> allocation was moved from i40e_setup_rx_descriptors() function, and was
> instead done in the i40e_configure_rx_ring() function.
>
> This broke the ethtool set_ringparam() hook for changing the Rx descriptor
> count, which was relying on i40e_setup_rx_descriptors() to handle the
> alloction.
>
> Fix this by adding an explicit i40e_alloc_rx_bi() call to i40e_set_ringparam().
>
> Fixes: be1222b585fd ("i40e: Separate kernel allocated rx_bi rings from
> AF_XDP rings")
> Signed-off-by: Björn Töpel <bjorn.topel@xxxxxxxxx>
> ---
> drivers/net/ethernet/intel/i40e/i40e_ethtool.c | 3 +++
> 1 file changed, 3 insertions(+)
Tested-by: Andrew Bowers <andrewx.bowers@xxxxxxxxx>
