bnx2x: Fix receiving tx-timeout in error or recovery state.

[ Upstream commit 484c016d9392786ce5c74017c206c706f29f823d ]

Driver performs the internal reload when it receives tx-timeout event from
the OS. Internal reload might fail in some scenarios e.g., fatal HW issues.
In such cases OS still see the link, which would result in undesirable
functionalities such as re-generation of tx-timeouts.
The patch addresses this issue by indicating the link-down to OS when
tx-timeout is detected, and keeping the link in down state till the
internal reload is successful.

Please consider applying it to 'net' branch.

Signed-off-by: Sudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com>
Signed-off-by: Ariel Elior <ariel.elior@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h b/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
index d847e1b9c37b5afff33e799e919e3ff39b5cd1e8..be1506169076f0a89f6a621d01dce81afe720ba7 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
@@ -1533,6 +1533,7 @@ struct bnx2x {
        struct link_vars        link_vars;
        u32                     link_cnt;
        struct bnx2x_link_report_data last_reported_link;
+       bool                    force_link_down;
 
        struct mdio_if_info     mdio;
 

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
index 95871576ab9251ff0b643471cfe0e11e3c3996d0..e7b305efa3fe18e54e13d350537052ca3bd46fca 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
@@ -1261,6 +1261,11 @@ void __bnx2x_link_report(struct bnx2x *bp)
 {
        struct bnx2x_link_report_data cur_data;
 
+       if (bp->force_link_down) {
+               bp->link_vars.link_up = 0;
+               return;
+       }
+
        /* reread mf_cfg */
        if (IS_PF(bp) && !CHIP_IS_E1(bp))
                bnx2x_read_mf_cfg(bp);
@@ -2817,6 +2822,7 @@ int bnx2x_nic_load(struct bnx2x *bp, int load_mode)
                bp->pending_max = 0;
        }
 
+       bp->force_link_down = false;
        if (bp->port.pmf) {
                rc = bnx2x_initial_phy_init(bp, load_mode);
                if (rc)

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
index c766ae23bc74f3a7da353a3bbddf72aabf1664cd..89484efbaba47e9e5259e3c3e9ff0466d5c8f1a3 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
@@ -10279,6 +10279,12 @@ static void bnx2x_sp_rtnl_task(struct work_struct *work)
                bp->sp_rtnl_state = 0;
                smp_mb();
 
+               /* Immediately indicate link as down */
+               bp->link_vars.link_up = 0;
+               bp->force_link_down = true;
+               netif_carrier_off(bp->dev);
+               BNX2X_ERR("Indicating link is down due to Tx-timeout\n");
+
                bnx2x_nic_unload(bp, UNLOAD_NORMAL, true);
                /* When ret value shows failure of allocation failure,
                 * the nic is rebooted again. If open still fails, a error