From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Trevor Woerner <twoerner@gmail.com>,
Vladimir Zapolskiy <vz@mleia.com>,
"David S. Miller" <davem@davemloft.net>
Subject: [PATCH 4.14 20/25] net: nxp: lpc_eth.c: avoid hang when bringing interface down
Date: Mon, 1 Nov 2021 10:17:32 +0100 [thread overview]
Message-ID: <20211101082451.797079081@linuxfoundation.org> (raw)
In-Reply-To: <20211101082447.070493993@linuxfoundation.org>
From: Trevor Woerner <twoerner@gmail.com>
commit ace19b992436a257d9a793672e57abc28fe83e2e upstream.
A hard hang is observed whenever the ethernet interface is brought
down. If the PHY is stopped before the LPC core block is reset,
the SoC will hang. Comparing lpc_eth_close() and lpc_eth_open() I
re-arranged the ordering of the functions calls in lpc_eth_close() to
reset the hardware before stopping the PHY.
Fixes: b7370112f519 ("lpc32xx: Added ethernet driver")
Signed-off-by: Trevor Woerner <twoerner@gmail.com>
Acked-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/ethernet/nxp/lpc_eth.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
--- a/drivers/net/ethernet/nxp/lpc_eth.c
+++ b/drivers/net/ethernet/nxp/lpc_eth.c
@@ -1037,9 +1037,6 @@ static int lpc_eth_close(struct net_devi
napi_disable(&pldat->napi);
netif_stop_queue(ndev);
- if (ndev->phydev)
- phy_stop(ndev->phydev);
-
spin_lock_irqsave(&pldat->lock, flags);
__lpc_eth_reset(pldat);
netif_carrier_off(ndev);
@@ -1047,6 +1044,8 @@ static int lpc_eth_close(struct net_devi
writel(0, LPC_ENET_MAC2(pldat->net_base));
spin_unlock_irqrestore(&pldat->lock, flags);
+ if (ndev->phydev)
+ phy_stop(ndev->phydev);
clk_disable_unprepare(pldat->clk);
return 0;
next prev parent reply other threads:[~2021-11-01 9:21 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-01 9:17 [PATCH 4.14 00/25] 4.14.254-rc1 review Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.14 01/25] ARM: 9133/1: mm: proc-macros: ensure *_tlb_fns are 4B aligned Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.14 02/25] ARM: 9134/1: remove duplicate memcpy() definition Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.14 03/25] ARM: 9139/1: kprobes: fix arch_init_kprobes() prototype Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.14 04/25] powerpc/bpf: Fix BPF_MOD when imm == 1 Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.14 05/25] ARM: 8819/1: Remove -p from LDFLAGS Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.14 06/25] usbnet: sanity check for maxpacket Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.14 07/25] usbnet: fix error return code in usbnet_probe() Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.14 08/25] ata: sata_mv: Fix the error handling of mv_chip_id() Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.14 09/25] nfc: port100: fix using -ERRNO as command type mask Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.14 10/25] Revert "net: mdiobus: Fix memory leak in __mdiobus_register" Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.14 11/25] ipv4: use siphash instead of Jenkins in fnhe_hashfun() Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.14 12/25] mmc: vub300: fix control-message timeouts Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.14 13/25] mmc: dw_mmc: exynos: fix the finding clock sample value Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.14 14/25] mmc: sdhci: Map more voltage level to SDHCI_POWER_330 Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.14 15/25] mmc: sdhci-esdhc-imx: clear the buffer_read_ready to reset standard tuning circuit Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.14 16/25] net: lan78xx: fix division by zero in send path Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.14 17/25] regmap: Fix possible double-free in regcache_rbtree_exit() Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.14 18/25] net: batman-adv: fix error handling Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.14 19/25] nios2: Make NIOS2_DTB_SOURCE_BOOL depend on !COMPILE_TEST Greg Kroah-Hartman
2021-11-01 9:17 ` Greg Kroah-Hartman [this message]
2021-11-01 9:17 ` [PATCH 4.14 21/25] sctp: use init_tag from inithdr for ABORT chunk Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.14 22/25] sctp: fix the processing for COOKIE_ECHO chunk Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.14 23/25] sctp: add vtag check in sctp_sf_violation Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.14 24/25] sctp: add vtag check in sctp_sf_do_8_5_1_E_sa Greg Kroah-Hartman
2021-11-01 9:17 ` [PATCH 4.14 25/25] sctp: add vtag check in sctp_sf_ootb Greg Kroah-Hartman
2021-11-01 11:14 ` [PATCH 4.14 00/25] 4.14.254-rc1 review Naresh Kamboju
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