octeontx2-pf: Fix adding mbox work queue entry when num_vfs > 64

When more than 64 VFs are enabled for a PF then mbox communication
between VF and PF is not working as mbox work queueing for few VFs
are skipped due to wrong calculation of VF numbers.

Fixes: d424b6c ("octeontx2-pf: Enable SRIOV and added VF mbox handling")
Signed-off-by: Geetha sowjanya <gakula@marvell.com>
Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com>
Link: https://lore.kernel.org/r/1700930042-5400-1-git-send-email-sbhatta@marvell.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Author: Geetha sowjanya

drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c

@@ -566,15 +566,18 @@ static irqreturn_t otx2_pfvf_mbox_intr_handler(int irq, void *pf_irq)
 		otx2_write64(pf, RVU_PF_VFPF_MBOX_INTX(1), intr);
 		otx2_queue_work(mbox, pf->mbox_pfvf_wq, 64, vfs, intr,
 				TYPE_PFVF);
-		vfs -= 64;
+		if (intr)
+			trace_otx2_msg_interrupt(mbox->mbox.pdev, "VF(s) to PF", intr);
+		vfs = 64;
 	}
 
 	intr = otx2_read64(pf, RVU_PF_VFPF_MBOX_INTX(0));
 	otx2_write64(pf, RVU_PF_VFPF_MBOX_INTX(0), intr);
 
 	otx2_queue_work(mbox, pf->mbox_pfvf_wq, 0, vfs, intr, TYPE_PFVF);
 
-	trace_otx2_msg_interrupt(mbox->mbox.pdev, "VF(s) to PF", intr);
+	if (intr)
+		trace_otx2_msg_interrupt(mbox->mbox.pdev, "VF(s) to PF", intr);
 
 	return IRQ_HANDLED;
 }