ieee1394: ohci1394: fix cosmetic problem in error logging

If posted write failed, an "Unhandled interrupt(s) 0x00000100" message
was logged by mistake.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
diff --git a/drivers/ieee1394/ohci1394.c b/drivers/ieee1394/ohci1394.c
index 6833b98..d91ef33 100644
--- a/drivers/ieee1394/ohci1394.c
+++ b/drivers/ieee1394/ohci1394.c
@@ -2377,6 +2377,7 @@
 	if (event & OHCI1394_postedWriteErr) {
 		PRINT(KERN_ERR, "physical posted write error");
 		/* no recovery strategy yet, had to involve protocol drivers */
+		event &= ~OHCI1394_postedWriteErr;
 	}
 	if (event & OHCI1394_cycleTooLong) {
 		if(printk_ratelimit())