Vincenzo Maffione 9b574c3d21 e1000: fix race condition between e1000_down() and e1000_watchdog ... [ Upstream commit 44c445c3d1 ] This patch fixes a race condition that can result into the interface being up and carrier on, but with transmits disabled in the hardware. The bug may show up by repeatedly IFF_DOWN+IFF_UP the interface, which allows e1000_watchdog() interleave with e1000_down(). CPU x CPU y -------------------------------------------------------------------- e1000_down(): netif_carrier_off() e1000_watchdog(): if (carrier == off) { netif_carrier_on(); enable_hw_transmit(); } disable_hw_transmit(); e1000_watchdog(): /* carrier on, do nothing */ Signed-off-by: Vincenzo Maffione <v.maffione@gmail.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2018-11-21 09:27:41 +01:00
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e1000	e1000: fix race condition between e1000_down() and e1000_watchdog	2018-11-21 09:27:41 +01:00
e1000e	e1000e: allocate ring descriptors with dma_zalloc_coherent	2018-05-30 07:49:03 +02:00
fm10k	fm10k: correctly check if interface is removed	2018-03-22 09:23:24 +01:00
i40e	i40e: fix ethtool to get EEPROM data from X722 interface	2018-03-22 09:23:20 +01:00
i40evf	i40evf: Use smp_rmb rather than read_barrier_depends	2017-11-30 08:37:24 +00:00
igb	igb: Remove superfluous reset to PHY and page 0 selection	2018-11-10 07:41:40 -08:00
igbvf	igbvf: Use smp_rmb rather than read_barrier_depends	2017-11-30 08:37:24 +00:00
ixgb	drivers/net: get rid of unnecessary initializations in .get_drvinfo()	2015-10-16 00:24:10 -07:00
ixgbe	ixgbe: Correct X550EM_x revision check	2018-11-10 07:41:38 -08:00
ixgbevf	ixgbevf: Fix handling of NAPI budget when multiple queues are enabled per vector	2018-11-10 07:41:38 -08:00
e100.c	e100: Release skb when DMA mapping is failed in e100_xmit_prepare	2015-08-18 14:06:05 -07:00
Kconfig	drivers/net: remove all references to obsolete Ethernet-HOWTO	2015-06-23 06:50:35 -07:00
Makefile	fm10k: Add skeletal frame for Intel(R) FM10000 Ethernet Switch Host Interface Driver	2014-09-23 03:59:13 -07:00