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| author | Samuel Ortiz <samuel@sortiz.org> | 2007-03-16 20:31:03 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-03-20 00:09:42 -0700 |
| commit | c577c2b99387b5ff8607d42d6eaff9ec024d4773 (patch) | |
| tree | 1f4e56d1209b1140060978183e7c03655477d149 | |
| parent | 7bb1bbe615de25d955b974cb47d40fa198154bb9 (diff) | |
| download | linux-c577c2b99387b5ff8607d42d6eaff9ec024d4773.tar.gz linux-c577c2b99387b5ff8607d42d6eaff9ec024d4773.tar.bz2 linux-c577c2b99387b5ff8607d42d6eaff9ec024d4773.zip | |
[IrDA]: Calling ppp_unregister_channel() from process context
We need to call ppp_unregister_channel() when IrNET disconnects, and this
must be done from a process context.
Bug reported and patch tested by Guennadi Liakhovetski.
Signed-off-by: Samuel Ortiz <samuel@sortiz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/irda/irnet/irnet.h | 2 | ||||
| -rw-r--r-- | net/irda/irnet/irnet_irda.c | 34 |
2 files changed, 26 insertions, 10 deletions
diff --git a/net/irda/irnet/irnet.h b/net/irda/irnet/irnet.h index 873ae189e37a..bc2e15ce7004 100644 --- a/net/irda/irnet/irnet.h +++ b/net/irda/irnet/irnet.h @@ -419,7 +419,7 @@ typedef struct irnet_socket u32 raccm; /* to please pppd - dummy) */ unsigned int flags; /* PPP flags (compression, ...) */ unsigned int rbits; /* Unused receive flags ??? */ - + struct work_struct disconnect_work; /* Process context disconnection */ /* ------------------------ IrTTP part ------------------------ */ /* We create a pseudo "socket" over the IrDA tranport */ unsigned long ttp_open; /* Set when IrTTP is ready */ diff --git a/net/irda/irnet/irnet_irda.c b/net/irda/irnet/irnet_irda.c index c378e668af0c..a4f1439ffdd8 100644 --- a/net/irda/irnet/irnet_irda.c +++ b/net/irda/irnet/irnet_irda.c @@ -10,6 +10,27 @@ #include "irnet_irda.h" /* Private header */ +/* + * PPP disconnect work: we need to make sure we're in + * process context when calling ppp_unregister_channel(). + */ +static void irnet_ppp_disconnect(struct work_struct *work) +{ + irnet_socket * self = + container_of(work, irnet_socket, disconnect_work); + + if (self == NULL) + return; + /* + * If we were connected, cleanup & close the PPP + * channel, which will kill pppd (hangup) and the rest. + */ + if (self->ppp_open && !self->ttp_open && !self->ttp_connect) { + ppp_unregister_channel(&self->chan); + self->ppp_open = 0; + } +} + /************************* CONTROL CHANNEL *************************/ /* * When ppp is not active, /dev/irnet act as a control channel. @@ -499,6 +520,8 @@ irda_irnet_create(irnet_socket * self) #endif /* DISCOVERY_NOMASK */ self->tx_flow = FLOW_START; /* Flow control from IrTTP */ + INIT_WORK(&self->disconnect_work, irnet_ppp_disconnect); + DEXIT(IRDA_SOCK_TRACE, "\n"); return(0); } @@ -1134,15 +1157,8 @@ irnet_disconnect_indication(void * instance, { if(test_open) { -#ifdef MISSING_PPP_API - /* ppp_unregister_channel() wants a user context, which we - * are guaranteed to NOT have here. What are we supposed - * to do here ? Jean II */ - /* If we were connected, cleanup & close the PPP channel, - * which will kill pppd (hangup) and the rest */ - ppp_unregister_channel(&self->chan); - self->ppp_open = 0; -#endif + /* ppp_unregister_channel() wants a user context. */ + schedule_work(&self->disconnect_work); } else { |