From ff229319f436f8e54345d832996b69db63bfc2d9 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Mon, 14 Oct 2019 12:16:42 +0200 Subject: [PATCH] powerpc: pseries: 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: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Michael Ellerman Cc: "Naveen N. Rao" Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org Link: https://lore.kernel.org/r/20191014101642.GA30179@kroah.com Signed-off-by: Greg Kroah-Hartman --- arch/powerpc/platforms/pseries/dtl.c | 38 ++++---------------- arch/powerpc/platforms/pseries/hvCall_inst.c | 12 ++----- arch/powerpc/platforms/pseries/lpar.c | 15 +------- 3 files changed, 10 insertions(+), 55 deletions(-) diff --git a/arch/powerpc/platforms/pseries/dtl.c b/arch/powerpc/platforms/pseries/dtl.c index 2b87480f2837..eab8aa293743 100644 --- a/arch/powerpc/platforms/pseries/dtl.c +++ b/arch/powerpc/platforms/pseries/dtl.c @@ -19,7 +19,6 @@ struct dtl { struct dtl_entry *buf; - struct dentry *file; int cpu; int buf_entries; u64 last_idx; @@ -320,46 +319,28 @@ static const struct file_operations dtl_fops = { static struct dentry *dtl_dir; -static int dtl_setup_file(struct dtl *dtl) +static void dtl_setup_file(struct dtl *dtl) { char name[10]; sprintf(name, "cpu-%d", dtl->cpu); - dtl->file = debugfs_create_file(name, 0400, dtl_dir, dtl, &dtl_fops); - if (!dtl->file) - return -ENOMEM; - - return 0; + debugfs_create_file(name, 0400, dtl_dir, dtl, &dtl_fops); } static int dtl_init(void) { - struct dentry *event_mask_file, *buf_entries_file; - int rc, i; + int i; if (!firmware_has_feature(FW_FEATURE_SPLPAR)) return -ENODEV; /* set up common debugfs structure */ - rc = -ENOMEM; dtl_dir = debugfs_create_dir("dtl", powerpc_debugfs_root); - if (!dtl_dir) { - printk(KERN_WARNING "%s: can't create dtl root dir\n", - __func__); - goto err; - } - event_mask_file = debugfs_create_x8("dtl_event_mask", 0600, - dtl_dir, &dtl_event_mask); - buf_entries_file = debugfs_create_u32("dtl_buf_entries", 0400, - dtl_dir, &dtl_buf_entries); - - if (!event_mask_file || !buf_entries_file) { - printk(KERN_WARNING "%s: can't create dtl files\n", __func__); - goto err_remove_dir; - } + debugfs_create_x8("dtl_event_mask", 0600, dtl_dir, &dtl_event_mask); + debugfs_create_u32("dtl_buf_entries", 0400, dtl_dir, &dtl_buf_entries); /* set up the per-cpu log structures */ for_each_possible_cpu(i) { @@ -367,16 +348,9 @@ static int dtl_init(void) spin_lock_init(&dtl->lock); dtl->cpu = i; - rc = dtl_setup_file(dtl); - if (rc) - goto err_remove_dir; + dtl_setup_file(dtl); } return 0; - -err_remove_dir: - debugfs_remove_recursive(dtl_dir); -err: - return rc; } machine_arch_initcall(pseries, dtl_init); diff --git a/arch/powerpc/platforms/pseries/hvCall_inst.c b/arch/powerpc/platforms/pseries/hvCall_inst.c index bcc1b67417a8..c40c62ec432e 100644 --- a/arch/powerpc/platforms/pseries/hvCall_inst.c +++ b/arch/powerpc/platforms/pseries/hvCall_inst.c @@ -129,7 +129,6 @@ static void probe_hcall_exit(void *ignored, unsigned long opcode, long retval, static int __init hcall_inst_init(void) { struct dentry *hcall_root; - struct dentry *hcall_file; char cpu_name_buf[CPU_NAME_BUF_SIZE]; int cpu; @@ -145,17 +144,12 @@ static int __init hcall_inst_init(void) } hcall_root = debugfs_create_dir(HCALL_ROOT_DIR, NULL); - if (!hcall_root) - return -ENOMEM; for_each_possible_cpu(cpu) { snprintf(cpu_name_buf, CPU_NAME_BUF_SIZE, "cpu%d", cpu); - hcall_file = debugfs_create_file(cpu_name_buf, 0444, - hcall_root, - per_cpu(hcall_stats, cpu), - &hcall_inst_seq_fops); - if (!hcall_file) - return -ENOMEM; + debugfs_create_file(cpu_name_buf, 0444, hcall_root, + per_cpu(hcall_stats, cpu), + &hcall_inst_seq_fops); } return 0; diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c index f87a5c64e24d..f9f57c55655e 100644 --- a/arch/powerpc/platforms/pseries/lpar.c +++ b/arch/powerpc/platforms/pseries/lpar.c @@ -1998,24 +1998,11 @@ static int __init vpa_debugfs_init(void) return 0; vpa_dir = debugfs_create_dir("vpa", powerpc_debugfs_root); - if (!vpa_dir) { - pr_warn("%s: can't create vpa root dir\n", __func__); - return -ENOMEM; - } /* set up the per-cpu vpa file*/ for_each_possible_cpu(i) { - struct dentry *d; - sprintf(name, "cpu-%ld", i); - - d = debugfs_create_file(name, 0400, vpa_dir, (void *)i, - &vpa_fops); - if (!d) { - pr_warn("%s: can't create per-cpu vpa file\n", - __func__); - return -ENOMEM; - } + debugfs_create_file(name, 0400, vpa_dir, (void *)i, &vpa_fops); } return 0; -- 2.30.2