X-Git-Url: http://git.samba.org/samba.git/?p=sfrench%2Fcifs-2.6.git;a=blobdiff_plain;f=kernel%2Firq%2Fmanage.c;h=e9d1c8205a3b0998d6e0a4c37b407a196bdcdab1;hp=801addda3c43d4a7a767b27468fee05232cb6f89;hb=cb9c34e6d090d376b77becaa5d29a65dec7f4272;hpb=061e41fdb5047b1fb161e89664057835935ca1d2

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 801addda3c43..e9d1c8205a3b 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -673,6 +673,18 @@ int request_irq(unsigned int irq, irq_handler_t handler,
 	struct irq_desc *desc;
 	int retval;
 
+	/*
+	 * handle_IRQ_event() always ignores IRQF_DISABLED except for
+	 * the _first_ irqaction (sigh).  That can cause oopsing, but
+	 * the behavior is classified as "will not fix" so we need to
+	 * start nudging drivers away from using that idiom.
+	 */
+	if ((irqflags & (IRQF_SHARED|IRQF_DISABLED))
+			== (IRQF_SHARED|IRQF_DISABLED))
+		pr_warning("IRQ %d/%s: IRQF_DISABLED is not "
+				"guaranteed on shared IRQs\n",
+				irq, devname);
+
 #ifdef CONFIG_LOCKDEP
 	/*
 	 * Lockdep wants atomic interrupt handlers: