From 5c2d6a527b2c36d5bc0129784dc88e88f1d4afee Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Thu, 7 Nov 2019 09:52:00 +0100 Subject: [PATCH] crypto: hisilicon: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Zhou Wang Cc: Herbert Xu Cc: "David S. Miller" Cc: linux-crypto@vger.kernel.org Cc: linux-kernel@vger.kernel.org Link: https://lore.kernel.org/r/20191107085200.GB1274176@kroah.com Signed-off-by: Greg Kroah-Hartman --- drivers/crypto/hisilicon/qm.c | 19 +++++-------------- drivers/crypto/hisilicon/zip/zip_main.c | 24 ++++++------------------ 2 files changed, 11 insertions(+), 32 deletions(-) diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c index f975c39..ed6f4c7 100644 --- a/drivers/crypto/hisilicon/qm.c +++ b/drivers/crypto/hisilicon/qm.c @@ -963,13 +963,11 @@ static const struct file_operations qm_regs_fops = { static int qm_create_debugfs_file(struct hisi_qm *qm, enum qm_debug_file index) { - struct dentry *qm_d = qm->debug.qm_d, *tmp; + struct dentry *qm_d = qm->debug.qm_d; struct debugfs_file *file = qm->debug.files + index; - tmp = debugfs_create_file(qm_debug_file_name[index], 0600, qm_d, file, - &qm_debug_fops); - if (IS_ERR(tmp)) - return -ENOENT; + debugfs_create_file(qm_debug_file_name[index], 0600, qm_d, file, + &qm_debug_fops); file->index = index; mutex_init(&file->lock); @@ -1780,12 +1778,10 @@ EXPORT_SYMBOL_GPL(hisi_qm_stop); */ int hisi_qm_debug_init(struct hisi_qm *qm) { - struct dentry *qm_d, *qm_regs; + struct dentry *qm_d; int i, ret; qm_d = debugfs_create_dir("qm", qm->debug.debug_root); - if (IS_ERR(qm_d)) - return -ENOENT; qm->debug.qm_d = qm_d; /* only show this in PF */ @@ -1796,12 +1792,7 @@ int hisi_qm_debug_init(struct hisi_qm *qm) goto failed_to_create; } - qm_regs = debugfs_create_file("qm_regs", 0444, qm->debug.qm_d, qm, - &qm_regs_fops); - if (IS_ERR(qm_regs)) { - ret = -ENOENT; - goto failed_to_create; - } + debugfs_create_file("qm_regs", 0444, qm->debug.qm_d, qm, &qm_regs_fops); return 0; diff --git a/drivers/crypto/hisilicon/zip/zip_main.c b/drivers/crypto/hisilicon/zip/zip_main.c index 1b2ee96..f203fa8 100644 --- a/drivers/crypto/hisilicon/zip/zip_main.c +++ b/drivers/crypto/hisilicon/zip/zip_main.c @@ -511,7 +511,7 @@ static int hisi_zip_core_debug_init(struct hisi_zip_ctrl *ctrl) struct hisi_qm *qm = &hisi_zip->qm; struct device *dev = &qm->pdev->dev; struct debugfs_regset32 *regset; - struct dentry *tmp_d, *tmp; + struct dentry *tmp_d; char buf[HZIP_BUF_SIZE]; int i; @@ -521,10 +521,6 @@ static int hisi_zip_core_debug_init(struct hisi_zip_ctrl *ctrl) else sprintf(buf, "decomp_core%d", i - HZIP_COMP_CORE_NUM); - tmp_d = debugfs_create_dir(buf, ctrl->debug_root); - if (!tmp_d) - return -ENOENT; - regset = devm_kzalloc(dev, sizeof(*regset), GFP_KERNEL); if (!regset) return -ENOENT; @@ -533,9 +529,8 @@ static int hisi_zip_core_debug_init(struct hisi_zip_ctrl *ctrl) regset->nregs = ARRAY_SIZE(hzip_dfx_regs); regset->base = qm->io_base + core_offsets[i]; - tmp = debugfs_create_regset32("regs", 0444, tmp_d, regset); - if (!tmp) - return -ENOENT; + tmp_d = debugfs_create_dir(buf, ctrl->debug_root); + debugfs_create_regset32("regs", 0444, tmp_d, regset); } return 0; @@ -543,7 +538,6 @@ static int hisi_zip_core_debug_init(struct hisi_zip_ctrl *ctrl) static int hisi_zip_ctrl_debug_init(struct hisi_zip_ctrl *ctrl) { - struct dentry *tmp; int i; for (i = HZIP_CURRENT_QM; i < HZIP_DEBUG_FILE_NUM; i++) { @@ -551,11 +545,9 @@ static int hisi_zip_ctrl_debug_init(struct hisi_zip_ctrl *ctrl) ctrl->files[i].ctrl = ctrl; ctrl->files[i].index = i; - tmp = debugfs_create_file(ctrl_debug_file_name[i], 0600, - ctrl->debug_root, ctrl->files + i, - &ctrl_debug_fops); - if (!tmp) - return -ENOENT; + debugfs_create_file(ctrl_debug_file_name[i], 0600, + ctrl->debug_root, ctrl->files + i, + &ctrl_debug_fops); } return hisi_zip_core_debug_init(ctrl); @@ -569,8 +561,6 @@ static int hisi_zip_debugfs_init(struct hisi_zip *hisi_zip) int ret; dev_d = debugfs_create_dir(dev_name(dev), hzip_debugfs_root); - if (!dev_d) - return -ENOENT; qm->debug.debug_root = dev_d; ret = hisi_qm_debug_init(qm); @@ -955,8 +945,6 @@ static void hisi_zip_register_debugfs(void) return; hzip_debugfs_root = debugfs_create_dir("hisi_zip", NULL); - if (IS_ERR_OR_NULL(hzip_debugfs_root)) - hzip_debugfs_root = NULL; } static void hisi_zip_unregister_debugfs(void) -- 2.7.4