ice, irdma: fix an off by one in error handling code

If we don't allocate the MIN number of IRQs then we need to free what
we have and return -ENOMEM.  The problem is this loop is off by one
so it frees an entry that wasn't allocated and it doesn't free the
first entry where i == 0.

Fixes: 3e0d3cb3fb ("ice, irdma: move interrupts code to irdma")
Signed-off-by: Dan Carpenter <[email protected]>
Signed-off-by: Tatyana Nikolova <[email protected]>
Link: https://patch.msgid.link/[email protected]
Reviewed-by: Michal Swiatkowski <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>

drivers/infiniband/hw/irdma/main.c

@@ -221,7 +221,7 @@ static int irdma_init_interrupts(struct irdma_pci_f *rf, struct ice_pf *pf)
 			break;
 
 	if (i < IRDMA_MIN_MSIX) {
-		for (; i > 0; i--)
+		while (--i >= 0)
 			ice_free_rdma_qvector(pf, &rf->msix_entries[i]);
 
 		kfree(rf->msix_entries);