From: Chen Linxuan <chenlinxuan@uniontech.com> maillist inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IC1RZZ CVE: NA Reference: https://web.git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git/commit/?h=... ---------------------------------------------------------------------- On x86_64 with gcc version 13.3.0, I compile drivers/infiniband/hw/hns/hns_roce_hw_v2.c with: make defconfig ./scripts/kconfig/merge_config.sh .config <( echo CONFIG_COMPILE_TEST=y echo CONFIG_HNS3=m echo CONFIG_INFINIBAND=m echo CONFIG_INFINIBAND_HNS_HIP08=m ) make KCFLAGS="-fno-inline-small-functions \ -fno-inline-functions-called-once" \ drivers/infiniband/hw/hns/hns_roce_hw_v2.o Then I get a compile error: CALL scripts/checksyscalls.sh DESCEND objtool INSTALL libsubcmd_headers CC [M] drivers/infiniband/hw/hns/hns_roce_hw_v2.o In file included from drivers/infiniband/hw/hns/hns_roce_hw_v2.c:47: drivers/infiniband/hw/hns/hns_roce_hw_v2.c: In function 'update_srq_db': drivers/infiniband/hw/hns/hns_roce_common.h:74:17: error: 'db' is used uninitialized [-Werror=uninitialized] 74 | *((__le32 *)_ptr + (field_h) / 32) &= \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/infiniband/hw/hns/hns_roce_common.h:90:17: note: in expansion of macro '_hr_reg_clear' 90 | _hr_reg_clear(ptr, field_type, field_h, field_l); \ | ^~~~~~~~~~~~~ drivers/infiniband/hw/hns/hns_roce_common.h:95:39: note: in expansion of macro '_hr_reg_write' 95 | #define hr_reg_write(ptr, field, val) _hr_reg_write(ptr, field, val) | ^~~~~~~~~~~~~ drivers/infiniband/hw/hns/hns_roce_hw_v2.c:948:9: note: in expansion of macro 'hr_reg_write' 948 | hr_reg_write(&db, DB_TAG, srq->srqn); | ^~~~~~~~~~~~ drivers/infiniband/hw/hns/hns_roce_hw_v2.c:946:31: note: 'db' declared here 946 | struct hns_roce_v2_db db; | ^~ cc1: all warnings being treated as errors Signed-off-by: Chen Linxuan <chenlinxuan@uniontech.com> Co-developed-by: Winston Wen <wentao@uniontech.com> Signed-off-by: Winston Wen <wentao@uniontech.com> Link: https://patch.msgid.link/FF922C77946229B6+20250411105459.90782-5-chenlinxuan... Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Xinghai Cen <cenxinghai@h-partners.com> --- drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c index ecb9777414ef..5041eb45168b 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c @@ -1051,7 +1051,7 @@ static void fill_wqe_idx(struct hns_roce_srq *srq, unsigned int wqe_idx) static void update_srq_db(struct hns_roce_srq *srq) { struct hns_roce_dev *hr_dev = to_hr_dev(srq->ibsrq.device); - struct hns_roce_v2_db db; + struct hns_roce_v2_db db = {}; hr_reg_write(&db, DB_TAG, srq->srqn); hr_reg_write(&db, DB_CMD, HNS_ROCE_V2_SRQ_DB); -- 2.33.0