提交 3995ecba 编写于 作者: B Björn Töpel 提交者: Jeff Kirsher

i40e: fix crash when Rx descriptor count is changed

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 allocation.

Fix this by adding an explicit i40e_alloc_rx_bi() call to
i40e_set_ringparam().

Fixes: be1222b5 ("i40e: Separate kernel allocated rx_bi rings from AF_XDP rings")
Signed-off-by: NBjörn Töpel <bjorn.topel@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
上级 b1d95cc2
......@@ -2070,6 +2070,9 @@ static int i40e_set_ringparam(struct net_device *netdev,
*/
rx_rings[i].tail = hw->hw_addr + I40E_PRTGEN_STATUS;
err = i40e_setup_rx_descriptors(&rx_rings[i]);
if (err)
goto rx_unwind;
err = i40e_alloc_rx_bi(&rx_rings[i]);
if (err)
goto rx_unwind;
......
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