Index: if_re_pci.c
===================================================================
RCS file: /cvs/src/sys/dev/pci/if_re_pci.c,v
retrieving revision 1.45
diff -u -p -r1.45 if_re_pci.c
--- if_re_pci.c	26 Jan 2015 09:58:47 -0000	1.45
+++ if_re_pci.c	18 Feb 2015 01:12:22 -0000
@@ -182,7 +182,7 @@ re_pci_attach(struct device *parent, str
 			/* Set PCIe maximum read request size to 2048. */
 			reg = pci_conf_read(pa->pa_pc, pa->pa_tag,
 			    sc->rl_expcap + PCI_PCIE_DCSR);
-			reg = (reg & ~PCI_PCIE_DCSR_MPS);
+			reg &= PCI_PCIE_DCSR_MPS;
 			reg >>= 12;
 			rrs = (1 << (reg + 7));
 			if (rrs < 2048) {