netdev - [PATCH net-next 3/8] i40e: use minimal Rx and Tx ring buffers for kdump

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Date:   Fri, 23 Apr 2021 09:42:42 -0700
From:   Tony Nguyen <anthony.l.nguyen@...el.com>
To:     davem@...emloft.net, kuba@...nel.org
Cc:     Coiby Xu <coxu@...hat.com>, netdev@...r.kernel.org,
        sassmann@...hat.com, anthony.l.nguyen@...el.com,
        Dave Switzer <david.switzer@...el.com>
Subject: [PATCH net-next 3/8] i40e: use minimal Rx and Tx ring buffers for kdump

From: Coiby Xu <coxu@...hat.com>

Use the minimum of the number of descriptors thus we will allocate the
minimal ring buffers for kdump.

Signed-off-by: Coiby Xu <coxu@...hat.com>
Tested-by: Dave Switzer <david.switzer@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index b51b8e25501d..2d3dbb3c0e14 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -11040,6 +11040,11 @@ static int i40e_set_num_rings_in_vsi(struct i40e_vsi *vsi)
 		return -ENODATA;
 	}
 
+	if (is_kdump_kernel()) {
+		vsi->num_tx_desc = I40E_MIN_NUM_DESCRIPTORS;
+		vsi->num_rx_desc = I40E_MIN_NUM_DESCRIPTORS;
+	}
+
 	return 0;
 }
 
-- 
2.26.2