mISDN: Fix irq detection

Fix false irq detection on disabled irqs.

Signed-off-by: Andreas Eversberg <andreas@eversberg.eu>
Signed-off-by: Karsten Keil <kkeil@suse.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/isdn/hardware/mISDN/hfcmulti.c b/drivers/isdn/hardware/mISDN/hfcmulti.c
index 592db93105f9..4cfab20d71a9 100644
--- a/drivers/isdn/hardware/mISDN/hfcmulti.c
+++ b/drivers/isdn/hardware/mISDN/hfcmulti.c
@@ -2658,6 +2658,7 @@ hfcmulti_interrupt(int intno, void *dev_id)
         if (status & V_MISC_IRQSTA) {
                 /* misc IRQ */
                 r_irq_misc = HFC_inb_nodebug(hc, R_IRQ_MISC);
+                r_irq_misc &= hc->hw.r_irqmsk_misc; /* ignore disabled irqs */
                 if (r_irq_misc & V_STA_IRQ) {
                         if (hc->type == 1) {
                                 /* state machine */