s390/vmur: fix irq pointer dereference in int handler
"irq" in vmur's int handler can be an error pointer. Don't dereference this pointer in that case. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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@ -306,10 +306,11 @@ static void ur_int_handler(struct ccw_device *cdev, unsigned long intparm,
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{
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struct urdev *urd;
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TRACE("ur_int_handler: intparm=0x%lx cstat=%02x dstat=%02x res=%u\n",
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intparm, irb->scsw.cmd.cstat, irb->scsw.cmd.dstat,
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irb->scsw.cmd.count);
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if (!IS_ERR(irb)) {
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TRACE("ur_int_handler: intparm=0x%lx cstat=%02x dstat=%02x res=%u\n",
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intparm, irb->scsw.cmd.cstat, irb->scsw.cmd.dstat,
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irb->scsw.cmd.count);
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}
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if (!intparm) {
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TRACE("ur_int_handler: unsolicited interrupt\n");
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return;
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