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jme: Protect vlgrp structure by pause RX actions. 

Temporary stop the RX IRQ, and disable (sync) tasklet or napi.
And restore it after finished the vlgrp pointer assignment.

Signed-off-by: Guo-Fu Tseng <cooldavid@cooldavid.org>
Cc: stable@kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Guo-Fu Tseng 2010-03-17 00:09:30 +00:00 committed by David S. Miller
parent 17da69b8bf
commit bf5e5360fd
1 changed files with 33 additions and 0 deletions
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33
drivers/net/jme.c
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@ -2083,12 +2083,45 @@ jme_tx_timeout(struct net_device *netdev)
jme_reset_link(jme);
}
static inline void jme_pause_rx(struct jme_adapter *jme)
{
atomic_dec(&jme->link_changing);
jme_set_rx_pcc(jme, PCC_OFF);
if (test_bit(JME_FLAG_POLL, &jme->flags)) {
JME_NAPI_DISABLE(jme);
} else {
tasklet_disable(&jme->rxclean_task);
tasklet_disable(&jme->rxempty_task);
}
}
static inline void jme_resume_rx(struct jme_adapter *jme)
{
struct dynpcc_info *dpi = &(jme->dpi);
if (test_bit(JME_FLAG_POLL, &jme->flags)) {
JME_NAPI_ENABLE(jme);
} else {
tasklet_hi_enable(&jme->rxclean_task);
tasklet_hi_enable(&jme->rxempty_task);
}
dpi->cur = PCC_P1;
dpi->attempt = PCC_P1;
dpi->cnt = 0;
jme_set_rx_pcc(jme, PCC_P1);
atomic_inc(&jme->link_changing);
}
static void
jme_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
{
struct jme_adapter *jme = netdev_priv(netdev);
jme_pause_rx(jme);
jme->vlgrp = grp;
jme_resume_rx(jme);
}
static void