hvc: clear some status flags.

without this, the request_irq failed with -22 (hvc_open).

diff --git a/drivers/tty/hvc/hvc_irq.c b/drivers/tty/hvc/hvc_irq.c
index c9adb0559f61c2b743125b35713df17e3720e624..a96d37f263ac658c09023888c86a5956b1a5ab1b 100644 (file)
--- a/drivers/tty/hvc/hvc_irq.c
+++ b/drivers/tty/hvc/hvc_irq.c
@@ -6,6 +6,7 @@
  */
 
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 
 #include "hvc_console.h"
 
@@ -28,6 +29,7 @@ int notifier_add_irq(struct hvc_struct *hp, int irq)
                hp->irq_requested = 0;
                return 0;
        }
+       irq_clear_status_flags(irq, IRQ_NOREQUEST|IRQ_NOAUTOEN);
        rc = request_irq(irq, hvc_handle_interrupt, 0,
                           "hvc_console", hp);
        if (!rc)