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RDMA/hns: Add a check to ensure integer mtu is positive

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GCC may reports an running time assert error when a value calculated from
ib_mtu_enum_to_int() is using as 'val' in FIELD_PREDP:

include/linux/compiler_types.h:328:38: error: call to
'__compiletime_assert_1524' declared with attribute error: FIELD_PREP:
value too large for the field

So a check is added about whether integer mtu from ib_mtu_enum_to_int() is
negative to avoid this warning.

Link: https://lore.kernel.org/r/1624262443-24528-3-git-send-email-liweihang@huawei.com
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Weihang Li 2021-06-21 16:00:36 +08:00 committed by Jason Gunthorpe
parent 78c1da5270
commit fe331da0f2
1 changed files with 10 additions and 5 deletions
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15
drivers/infiniband/hw/hns/hns_roce_hw_v2.c
View file

@ -4509,12 +4509,13 @@ static int modify_qp_init_to_rtr(struct ib_qp *ibqp,
struct ib_device *ibdev = &hr_dev->ib_dev;
dma_addr_t trrl_ba;
dma_addr_t irrl_ba;
enum ib_mtu mtu;
enum ib_mtu ib_mtu;
u8 lp_pktn_ini;
u64 *mtts;
u8 *dmac;
u8 *smac;
u32 port;
int mtu;
int ret;
ret = config_qp_rq_buf(hr_dev, hr_qp, context, qpc_mask);
@ -4598,19 +4599,23 @@ static int modify_qp_init_to_rtr(struct ib_qp *ibqp,
roce_set_field(qpc_mask->byte_52_udpspn_dmac, V2_QPC_BYTE_52_DMAC_M,
V2_QPC_BYTE_52_DMAC_S, 0);
mtu = get_mtu(ibqp, attr);
hr_qp->path_mtu = mtu;
ib_mtu = get_mtu(ibqp, attr);
hr_qp->path_mtu = ib_mtu;
mtu = ib_mtu_enum_to_int(ib_mtu);
if (WARN_ON(mtu < 0))
return -EINVAL;
if (attr_mask & IB_QP_PATH_MTU) {
roce_set_field(context->byte_24_mtu_tc, V2_QPC_BYTE_24_MTU_M,
V2_QPC_BYTE_24_MTU_S, mtu);
V2_QPC_BYTE_24_MTU_S, ib_mtu);
roce_set_field(qpc_mask->byte_24_mtu_tc, V2_QPC_BYTE_24_MTU_M,
V2_QPC_BYTE_24_MTU_S, 0);
}
#define MAX_LP_MSG_LEN 65536
/* MTU * (2 ^ LP_PKTN_INI) shouldn't be bigger than 64KB */
lp_pktn_ini = ilog2(MAX_LP_MSG_LEN / ib_mtu_enum_to_int(mtu));
lp_pktn_ini = ilog2(MAX_LP_MSG_LEN / mtu);
roce_set_field(context->byte_56_dqpn_err, V2_QPC_BYTE_56_LP_PKTN_INI_M,
V2_QPC_BYTE_56_LP_PKTN_INI_S, lp_pktn_ini);