isdn: fix random hard freeze with AVM c4 card part 2

One call was missing in the previous patch.

Signed-off-by: Karsten Keil <kkeil@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/isdn/hardware/avm/c4.c b/drivers/isdn/hardware/avm/c4.c
index 8710cf6214d9fc9487841547a4139625948d51c1..4bbbbe688077558f1793c746e0f95380d8b65f17 100644 (file)
--- a/drivers/isdn/hardware/avm/c4.c
+++ b/drivers/isdn/hardware/avm/c4.c
@@ -678,7 +678,9 @@ static irqreturn_t c4_handle_interrupt(avmcard *card)
                 for (i=0; i < card->nr_controllers; i++) {
                        avmctrl_info *cinfo = &card->ctrlinfo[i];
                        memset(cinfo->version, 0, sizeof(cinfo->version));
+                       spin_lock_irqsave(&card->lock, flags);
                        capilib_release(&cinfo->ncci_head);
+                       spin_unlock_irqrestore(&card->lock, flags);
                        capi_ctr_reseted(&cinfo->capi_ctrl);
                }
                card->nlogcontr = 0;