From ff847ac2d3e90edd94674c28bade25ae1e6a2e49 Mon Sep 17 00:00:00 2001 From: Bruce Allan Date: Tue, 27 Jul 2010 12:28:46 +0000 Subject: [PATCH] e1000e: 82577/82578 PHY register access issues The MAC-PHY interconnect on 82577/82578 uses a power management feature (called K1) which must be disabled when in 1Gbps due to a hardware issue on these parts. The #define bit setting used to enable/disable K1 is incorrect and can cause PHY register accesses to stop working altogether until the next device reset. This patch sets the register correctly. This issue is present in kernels since 2.6.32. CC: stable@kernel.org Signed-off-by: Bruce Allan Tested-by: Jeff Pieper Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/e1000e/hw.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/e1000e/hw.h b/drivers/net/e1000e/hw.h index 5d1220d188d4..664ed5812cff 100644 --- a/drivers/net/e1000e/hw.h +++ b/drivers/net/e1000e/hw.h @@ -308,7 +308,7 @@ enum e1e_registers { #define E1000_KMRNCTRLSTA_INBAND_PARAM 0x9 /* Kumeran InBand Parameters */ #define E1000_KMRNCTRLSTA_DIAG_NELPBK 0x1000 /* Nearend Loopback mode */ #define E1000_KMRNCTRLSTA_K1_CONFIG 0x7 -#define E1000_KMRNCTRLSTA_K1_ENABLE 0x140E +#define E1000_KMRNCTRLSTA_K1_ENABLE 0x0002 #define E1000_KMRNCTRLSTA_K1_DISABLE 0x1400 #define IFE_PHY_EXTENDED_STATUS_CONTROL 0x10 -- 2.11.0