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forcedeth: restart tx/rx 

This patch fixes the issue where the transmitter and receiver must be
restarted when applying new changes to certain registers.

Signed-off-by: Ayaz Abdulla <aabdulla@nvidia.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Ayaz Abdulla 2008-02-04 15:13:59 -05:00 committed by Jeff Garzik
parent 47eaa267a5
commit b2976d23a1
1 changed files with 19 additions and 0 deletions
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19
drivers/net/forcedeth.c
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@ -624,6 +624,9 @@ union ring_type {
#define NV_MSI_X_VECTOR_TX 0x1
#define NV_MSI_X_VECTOR_OTHER 0x2
#define NV_RESTART_TX 0x1
#define NV_RESTART_RX 0x2
/* statistics */
struct nv_ethtool_str {
char name[ETH_GSTRING_LEN];
@ -2767,6 +2770,7 @@ static int nv_update_linkspeed(struct net_device *dev)
int mii_status;
int retval = 0;
u32 control_1000, status_1000, phyreg, pause_flags, txreg;
u32 txrxFlags = 0;
/* BMSR_LSTATUS is latched, read it twice:
* we want the current value.
@ -2862,6 +2866,16 @@ static int nv_update_linkspeed(struct net_device *dev)
np->duplex = newdup;
np->linkspeed = newls;
/* The transmitter and receiver must be restarted for safe update */
if (readl(base + NvRegTransmitterControl) & NVREG_XMITCTL_START) {
txrxFlags |= NV_RESTART_TX;
nv_stop_tx(dev);
}
if (readl(base + NvRegReceiverControl) & NVREG_RCVCTL_START) {
txrxFlags |= NV_RESTART_RX;
nv_stop_rx(dev);
}
if (np->gigabit == PHY_GIGABIT) {
phyreg = readl(base + NvRegRandomSeed);
phyreg &= ~(0x3FF00);
@ -2950,6 +2964,11 @@ static int nv_update_linkspeed(struct net_device *dev)
}
nv_update_pause(dev, pause_flags);
if (txrxFlags & NV_RESTART_TX)
nv_start_tx(dev);
if (txrxFlags & NV_RESTART_RX)
nv_start_rx(dev);
return retval;
}