linux-kernel - [PATCH net 11/11] net: thunderx: Fix for crash while BGX teardown

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Message-ID: <1438177787-20940-12-git-send-email-aleksey.makarov@caviumnetworks.com>
Date:	Wed, 29 Jul 2015 16:49:46 +0300
From:	Aleksey Makarov <aleksey.makarov@...iumnetworks.com>
To:	<netdev@...r.kernel.org>
CC:	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	David Daney <david.daney@...ium.com>,
	Robert Richter <robert.richter@...iumnetworks.com>,
	Aleksey Makarov <aleksey.makarov@...iumnetworks.com>,
	Sunil Goutham <Sunil.Goutham@...iumnetworks.com>,
	Thanneeru Srinivasulu <tsrinivasulu@...iumnetworks.com>,
	Sunil Goutham <sgoutham@...ium.com>,
	Robert Richter <rric@...nel.org>
Subject: [PATCH net 11/11] net: thunderx: Fix for crash while BGX teardown

From: Thanneeru Srinivasulu <tsrinivasulu@...iumnetworks.com>

Cortina phy does not have kernel driver and we don't attach
device with phy layer for intefaces like XFI, XLAUI etc,
Hence check for interface type before calling disconnect.

Signed-off-by: Thanneeru Srinivasulu <tsrinivasulu@...iumnetworks.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@...iumnetworks.com>
---
 drivers/net/ethernet/cavium/thunder/thunder_bgx.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
index 633ec05..b961a89 100644
--- a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
+++ b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
@@ -673,7 +673,10 @@ static void bgx_lmac_disable(struct bgx *bgx, u8 lmacid)
 	bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cmrx_cfg);
 	bgx_flush_dmac_addrs(bgx, lmacid);
 
-	if (lmac->phydev)
+	if ((bgx->lmac_type != BGX_MODE_XFI) &&
+	    (bgx->lmac_type != BGX_MODE_XLAUI) &&
+	    (bgx->lmac_type != BGX_MODE_40G_KR) &&
+	    (bgx->lmac_type != BGX_MODE_10G_KR) && lmac->phydev)
 		phy_disconnect(lmac->phydev);
 
 	lmac->phydev = NULL;
-- 
2.4.6

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