4.4-stable review patch. If anyone has any objections, please let me know.
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From: Florian Fainelli f.fainelli@gmail.com
[ Upstream commit 8dfb8d2cceb76b74ad5b58cc65c75994329b4d5e ]
Broadcom STB chips support a deep sleep mode where all register contents are lost. Because we were stashing the MagicPacket password into some of these registers a suspend into that deep sleep then a resumption would not lead to being able to wake-up from MagicPacket with password again.
Fix this by keeping a software copy of the password and program it during suspend.
Fixes: 83e82f4c706b ("net: systemport: add Wake-on-LAN support") Signed-off-by: Florian Fainelli f.fainelli@gmail.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/broadcom/bcmsysport.c | 25 ++++++++++--------------- drivers/net/ethernet/broadcom/bcmsysport.h | 2 ++ 2 files changed, 12 insertions(+), 15 deletions(-)
--- a/drivers/net/ethernet/broadcom/bcmsysport.c +++ b/drivers/net/ethernet/broadcom/bcmsysport.c @@ -400,7 +400,6 @@ static void bcm_sysport_get_wol(struct n struct ethtool_wolinfo *wol) { struct bcm_sysport_priv *priv = netdev_priv(dev); - u32 reg;
wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE; wol->wolopts = priv->wolopts; @@ -408,11 +407,7 @@ static void bcm_sysport_get_wol(struct n if (!(priv->wolopts & WAKE_MAGICSECURE)) return;
- /* Return the programmed SecureOn password */ - reg = umac_readl(priv, UMAC_PSW_MS); - put_unaligned_be16(reg, &wol->sopass[0]); - reg = umac_readl(priv, UMAC_PSW_LS); - put_unaligned_be32(reg, &wol->sopass[2]); + memcpy(wol->sopass, priv->sopass, sizeof(priv->sopass)); }
static int bcm_sysport_set_wol(struct net_device *dev, @@ -428,13 +423,8 @@ static int bcm_sysport_set_wol(struct ne if (wol->wolopts & ~supported) return -EINVAL;
- /* Program the SecureOn password */ - if (wol->wolopts & WAKE_MAGICSECURE) { - umac_writel(priv, get_unaligned_be16(&wol->sopass[0]), - UMAC_PSW_MS); - umac_writel(priv, get_unaligned_be32(&wol->sopass[2]), - UMAC_PSW_LS); - } + if (wol->wolopts & WAKE_MAGICSECURE) + memcpy(priv->sopass, wol->sopass, sizeof(priv->sopass));
/* Flag the device and relevant IRQ as wakeup capable */ if (wol->wolopts) { @@ -1889,12 +1879,17 @@ static int bcm_sysport_suspend_to_wol(st unsigned int timeout = 1000; u32 reg;
- /* Password has already been programmed */ reg = umac_readl(priv, UMAC_MPD_CTRL); reg |= MPD_EN; reg &= ~PSW_EN; - if (priv->wolopts & WAKE_MAGICSECURE) + if (priv->wolopts & WAKE_MAGICSECURE) { + /* Program the SecureOn password */ + umac_writel(priv, get_unaligned_be16(&priv->sopass[0]), + UMAC_PSW_MS); + umac_writel(priv, get_unaligned_be32(&priv->sopass[2]), + UMAC_PSW_LS); reg |= PSW_EN; + } umac_writel(priv, reg, UMAC_MPD_CTRL);
/* Make sure RBUF entered WoL mode as result */ --- a/drivers/net/ethernet/broadcom/bcmsysport.h +++ b/drivers/net/ethernet/broadcom/bcmsysport.h @@ -11,6 +11,7 @@ #ifndef __BCM_SYSPORT_H #define __BCM_SYSPORT_H
+#include <linux/ethtool.h> #include <linux/if_vlan.h>
/* Receive/transmit descriptor format */ @@ -682,6 +683,7 @@ struct bcm_sysport_priv { unsigned int crc_fwd:1; u16 rev; u32 wolopts; + u8 sopass[SOPASS_MAX]; unsigned int wol_irq_disabled:1;
/* MIB related fields */