From: Corey Minyard <cminyard@mvista.com>

Hold handling of ATTN until the upper layer has reported that it is
ready.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Cc: Patrick Schoeller <Patrick.Schoeller@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/char/ipmi/ipmi_si_intf.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff -puN drivers/char/ipmi/ipmi_si_intf.c~ipmi-hold-attn-until-upper-layer-ready drivers/char/ipmi/ipmi_si_intf.c
--- a/drivers/char/ipmi/ipmi_si_intf.c~ipmi-hold-attn-until-upper-layer-ready
+++ a/drivers/char/ipmi/ipmi_si_intf.c
@@ -723,8 +723,11 @@ static enum si_sm_result smi_event_handl
 		si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
 	}
 
-	/* We prefer handling attn over new messages. */
-	if (si_sm_result == SI_SM_ATTN)
+	/*
+	 * We prefer handling attn over new messages.  But don't do
+	 * this if there is not yet an upper layer to handle anything.
+	 */
+	if (likely(smi_info->intf) && si_sm_result == SI_SM_ATTN)
 	{
 		unsigned char msg[2];
 
_