Commit d5a866ab authored Aug 24, 2023 by Radoslaw Tyl Committed by Lee Jones Oct 24, 2023

UPSTREAM: igb: set max size RX buffer when store bad packet is enabled



commit bb5ed01cd2428cd25b1c88a3a9cba87055eb289f upstream.

Increase the RX buffer size to 3K when the SBP bit is on. The size of
the RX buffer determines the number of pages allocated which may not
be sufficient for receive frames larger than the set MTU size.

Bug: 306483516
Cc: stable@vger.kernel.org
Fixes: 89eaefb6 ("igb: Support RX-ALL feature flag.")
Reported-by: Manfred Rudigier <manfred.rudigier@omicronenergy.com>
Signed-off-by: Radoslaw Tyl <radoslawx.tyl@intel.com>
Tested-by: Arpana Arland <arpanax.arland@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit be7353af5b35c8f4a11573a38b997f74f8c2ae4b)
Signed-off-by: Lee Jones <joneslee@google.com>
Change-Id: I3f05b369cd9ac24643af3e37e2ce1d099c63bc02

parent 5e99400d

drivers/net/ethernet/intel/igb/igb_main.c

+7 −4

Original line number	Diff line number	Diff line
		@@ -4552,6 +4552,10 @@ void igb_configure_rx_ring(struct igb_adapter *adapter,
		static void igb_set_rx_buffer_len(struct igb_adapter *adapter,
		struct igb_ring *rx_ring)
		{
		#if (PAGE_SIZE < 8192)
		struct e1000_hw *hw = &adapter->hw;
		#endif

		/* set build_skb and buffer size flags */
		clear_ring_build_skb_enabled(rx_ring);
		clear_ring_uses_large_buffer(rx_ring);
		@@ -4562,9 +4566,8 @@ static void igb_set_rx_buffer_len(struct igb_adapter *adapter,
		set_ring_build_skb_enabled(rx_ring);

		#if (PAGE_SIZE < 8192)
		if (adapter->max_frame_size <= IGB_MAX_FRAME_BUILD_SKB)
		return;

		if (adapter->max_frame_size > IGB_MAX_FRAME_BUILD_SKB \|\|
		rd32(E1000_RCTL) & E1000_RCTL_SBP)
		set_ring_uses_large_buffer(rx_ring);
		#endif
		}