[linuxsh-dev] Probing IRQ with irq_imask interrupt

[NIIBE Y. <gn...@ch...>]

Takashi says there's problem with irq_imask interrupt when probe_irq
is used.  When shutdown of the irq is called, IMASK has been changed
which raises the IMASK.  Irq_imask is different beast, the default
state is all enabled, so here's the patch.

2000-09-08  NIIBE Yutaka  <gn...@m1...>

	* arch/sh/kernel/irq_imask.c (startup_imask_irq,
	shutdown_imask_irq): Don't do anything.  When used with
	proble_irq, interrupt may be masked.
	NOTE: For IMASK, default is "all enabled".

===================================================================
RCS file: /cvsroot/linuxsh/kernel/arch/sh/kernel/irq_imask.c,v
retrieving revision 1.9
diff -u -r1.9 irq_imask.c
--- arch/sh/kernel/irq_imask.c	2000/07/31 12:26:21	1.9
+++ arch/sh/kernel/irq_imask.c	2000/09/07 10:33:17
@@ -41,7 +41,7 @@
 
 static unsigned int startup_imask_irq(unsigned int irq)
 { 
-	enable_imask_irq(irq);
+	/* Nothing to do */
 	return 0; /* never anything pending */
 }
 
@@ -103,12 +103,12 @@
 
 static void shutdown_imask_irq(unsigned int irq)
 {
-	disable_imask_irq(irq);
+	/* Nothing to do */
 }
 
 void make_imask_irq(unsigned int irq)
 {
 	disable_irq_nosync(irq);
 	irq_desc[irq].handler = &imask_irq_type;
-	enable_irq(irq);
+	disable_imask_irq(irq);
 }