From: Arnd Bergmann <arnd@arndb.de> mainline inclusion from mainline-v6.13-rc7 commit 2ff46b9eca2bb86c364942e86fd0145d56b62e40 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/ICHMW9 CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=2f... ---------------------------------------------------------------------- This function exceeds the stack frame warning limit: drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c: In function 'hclge_dbg_dump_tm_pri': drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:1039:1: error: the frame size of 1408 bytes is larger than 1024 bytes [-Werror=frame-larger-than=] Use dynamic allocation for the largest stack object instead. It would be nice to rewrite this file to completely avoid the extra buffer and just use the one that was already allocated by debugfs, but that is a much larger change. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/r/20231204085735.4112882-1-arnd@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Donghua Huang <huangdonghua3@h-partners.com> --- .../hisilicon/hns3/hns3pf/hclge_debugfs.c | 21 ++++++++++++------- 1 file changed, 14 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c index dc00fc511365..4a5c9fff17c6 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c @@ -1635,19 +1635,24 @@ static const struct hclge_dbg_item tm_pri_items[] = { static int hclge_dbg_dump_tm_pri(struct hclge_dev *hdev, char *buf, int len) { - char data_str[ARRAY_SIZE(tm_pri_items)][HCLGE_DBG_DATA_STR_LEN]; struct hclge_tm_shaper_para c_shaper_para, p_shaper_para; char *result[ARRAY_SIZE(tm_pri_items)], *sch_mode_str; char content[HCLGE_DBG_TM_INFO_LEN]; u8 pri_num, sch_mode, weight, i, j; + char *data_str; int pos, ret; ret = hclge_tm_get_pri_num(hdev, &pri_num); if (ret) return ret; + data_str = kcalloc(ARRAY_SIZE(tm_pri_items), HCLGE_DBG_DATA_STR_LEN, + GFP_KERNEL); + if (!data_str) + return -ENOMEM; + for (i = 0; i < ARRAY_SIZE(tm_pri_items); i++) - result[i] = &data_str[i][0]; + result[i] = &data_str[i * HCLGE_DBG_DATA_STR_LEN]; hclge_dbg_fill_content(content, sizeof(content), tm_pri_items, NULL, ARRAY_SIZE(tm_pri_items)); @@ -1656,23 +1661,23 @@ static int hclge_dbg_dump_tm_pri(struct hclge_dev *hdev, char *buf, int len) for (i = 0; i < pri_num; i++) { ret = hclge_tm_get_pri_sch_mode(hdev, i, &sch_mode); if (ret) - return ret; + goto out; ret = hclge_tm_get_pri_weight(hdev, i, &weight); if (ret) - return ret; + goto out; ret = hclge_tm_get_pri_shaper(hdev, i, HCLGE_OPC_TM_PRI_C_SHAPPING, &c_shaper_para); if (ret) - return ret; + goto out; ret = hclge_tm_get_pri_shaper(hdev, i, HCLGE_OPC_TM_PRI_P_SHAPPING, &p_shaper_para); if (ret) - return ret; + goto out; sch_mode_str = sch_mode & HCLGE_TM_TX_SCHD_DWRR_MSK ? "dwrr" : "sp"; @@ -1689,7 +1694,9 @@ static int hclge_dbg_dump_tm_pri(struct hclge_dev *hdev, char *buf, int len) pos += scnprintf(buf + pos, len - pos, "%s", content); } - return 0; +out: + kfree(data_str); + return ret; } static const struct hclge_dbg_item tm_qset_items[] = { -- 2.33.0