IB: Fix display of 4-bit port counters in sysfs

The code to display local_link_integrity_errors and
excessive_buffer_overrun_errors in
/sys/class/infiniband/<hca>/ports/<n>/counters/
uses the wrong shift to extract the 4 bit values.
Signed-off-by: NRalph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>

drivers/infiniband/core/sysfs.c

@@ -336,7 +336,7 @@ static ssize_t show_pma_counter(struct ib_port *p, struct port_attribute *attr,
 	switch (width) {
 	case 4:
 		ret = sprintf(buf, "%u\n", (out_mad->data[40 + offset / 8] >>
-					    (offset % 4)) & 0xf);
+					    (4 - (offset % 8))) & 0xf);
 		break;
 	case 8:
 		ret = sprintf(buf, "%u\n", out_mad->data[40 + offset / 8]);