linux/drivers/infiniband
Arnd Bergmann 65fc82cea8 infiniband: hns: avoid gcc-7.0.1 warning for uninitialized data
commit 5b0ff9a007 upstream.

hns_roce_v1_cq_set_ci() calls roce_set_bit() on an uninitialized field,
which will then change only a few of its bits, causing a warning with
the latest gcc:

infiniband/hw/hns/hns_roce_hw_v1.c: In function 'hns_roce_v1_cq_set_ci':
infiniband/hw/hns/hns_roce_hw_v1.c:1854:23: error: 'doorbell[1]' is used uninitialized in this function [-Werror=uninitialized]
  roce_set_bit(doorbell[1], ROCEE_DB_OTHERS_H_ROCEE_DB_OTH_HW_SYNS_S, 1);

The code is actually correct since we always set all bits of the
port_vlan field, but gcc correctly points out that the first
access does contain uninitialized data.

This initializes the field to zero first before setting the
individual bits.

Fixes: 9a4435375c ("IB/hns: Add driver files for hns RoCE driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2017-07-05 14:40:30 +02:00
..
core infiniband: call ipv6 route lookup via the stub interface 2017-05-25 15:44:32 +02:00
hw infiniband: hns: avoid gcc-7.0.1 warning for uninitialized data 2017-07-05 14:40:30 +02:00
sw IB/rxe: Fix mem_check_range integer overflow 2017-02-14 15:25:42 -08:00
ulp IB/IPoIB: ibX: failed to create mcg debug file 2017-05-20 14:28:38 +02:00
Kconfig qedr: Add RoCE driver framework 2016-10-14 15:00:10 -04:00
Makefile IB/rdmavt: Create module framework and handle driver registration 2016-03-10 20:37:04 -05:00