Patchwork [08/20] sfc: Fix post-reset MAC selection

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Submitter Ben Hutchings
Date Jan. 29, 2009, 7:19 p.m.
Message ID <1233256749.3656.28.camel@achroite>
Download mbox | patch
Permalink /patch/21062/
State Rejected
Delegated to: David Miller
Headers show

Comments

Ben Hutchings - Jan. 29, 2009, 7:19 p.m.
From: Steve Hodgson <shodgson@solarflare.com>

Modify falcon_switch_mac() to always set NIC_STAT_REG, even if the the
MAC is the same as it was before.  This ensures that the value is
correct after an online reset.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
---
 drivers/net/sfc/falcon.c |   15 ++++++++-------
 1 files changed, 8 insertions(+), 7 deletions(-)

Patch

diff --git a/drivers/net/sfc/falcon.c b/drivers/net/sfc/falcon.c
index ae7b0b4..d9412f8 100644
--- a/drivers/net/sfc/falcon.c
+++ b/drivers/net/sfc/falcon.c
@@ -2283,16 +2283,12 @@  int falcon_switch_mac(struct efx_nic *efx)
 		efx->link_fd = true;
 	}
 
+	WARN_ON(!mutex_is_locked(&efx->mac_lock));
 	efx->mac_op = (EFX_IS10G(efx) ?
 		       &falcon_xmac_operations : &falcon_gmac_operations);
-	if (old_mac_op == efx->mac_op)
-		return 0;
-
-	WARN_ON(!mutex_is_locked(&efx->mac_lock));
-
-	/* Not all macs support a mac-level link state */
-	efx->mac_up = true;
 
+	/* Always push the NIC_STAT_REG setting even if the mac hasn't
+	 * changed, because this function is run post online reset */
 	falcon_read(efx, &nic_stat, NIC_STAT_REG);
 	strap_val = EFX_IS10G(efx) ? 5 : 3;
 	if (falcon_rev(efx) >= FALCON_REV_B0) {
@@ -2305,8 +2301,13 @@  int falcon_switch_mac(struct efx_nic *efx)
 		BUG_ON(EFX_OWORD_FIELD(nic_stat, STRAP_PINS) != strap_val);
 	}
 
+	if (old_mac_op == efx->mac_op)
+		return 0;
 
 	EFX_LOG(efx, "selected %cMAC\n", EFX_IS10G(efx) ? 'X' : 'G');
+	/* Not all macs support a mac-level link state */
+	efx->mac_up = true;
+
 	return falcon_reset_macs(efx);
 }