netdev - [PATCH net 2/3] nfp: drop support for old firmware ABIs

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Date:   Wed,  7 Sep 2016 19:45:36 +0100
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     netdev@...r.kernel.org
Cc:     Jakub Kicinski <jakub.kicinski@...ronome.com>
Subject: [PATCH net 2/3] nfp: drop support for old firmware ABIs

Be more strict about FW versions.  Drop support for old
transitional revisions which were never used in production.
Dropping support for FW ABI version 0.0.0.0 is particularly
useful because 0 could just be uninitialized memory.

Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
Reviewed-by: Dinan Gunawardena <dinan.gunawardena@...ronome.com>
---
 drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c b/drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c
index 6f22b0e12ac7..f7062cb648e1 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_netvf_main.c
@@ -133,7 +133,7 @@ static int nfp_netvf_pci_probe(struct pci_dev *pdev,
 	}
 
 	nfp_net_get_fw_version(&fw_ver, ctrl_bar);
-	if (fw_ver.class != NFP_NET_CFG_VERSION_CLASS_GENERIC) {
+	if (fw_ver.resv || fw_ver.class != NFP_NET_CFG_VERSION_CLASS_GENERIC) {
 		dev_err(&pdev->dev, "Unknown Firmware ABI %d.%d.%d.%d\n",
 			fw_ver.resv, fw_ver.class, fw_ver.major, fw_ver.minor);
 		err = -EINVAL;
@@ -141,9 +141,7 @@ static int nfp_netvf_pci_probe(struct pci_dev *pdev,
 	}
 
 	/* Determine stride */
-	if (nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 0) ||
-	    nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 1) ||
-	    nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0x12, 0x48)) {
+	if (nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 1)) {
 		stride = 2;
 		tx_bar_no = NFP_NET_Q0_BAR;
 		rx_bar_no = NFP_NET_Q1_BAR;
-- 
1.9.1