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authorGuo-Fu Tseng <cooldavid@cooldavid.org>2010-03-17 00:09:30 +0000
committerDavid S. Miller <davem@davemloft.net>2010-03-18 21:14:00 -0700
commitbf5e5360fd1df1ae429ebbd81838d7d0879797d1 (patch)
treeb75cfb068c845430ae93931ab7869b8bccc1e0a2 /drivers/net/jme.c
parent17da69b8bfbe441a33a873ad5dd7d3d85800bf2b (diff)
downloadop-kernel-dev-bf5e5360fd1df1ae429ebbd81838d7d0879797d1.zip
op-kernel-dev-bf5e5360fd1df1ae429ebbd81838d7d0879797d1.tar.gz
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>
Diffstat (limited to 'drivers/net/jme.c')
-rw-r--r--drivers/net/jme.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/net/jme.c b/drivers/net/jme.c
index cfc7b98..c0b59a5 100644
--- a/drivers/net/jme.c
+++ b/drivers/net/jme.c
@@ -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
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