From f344f0ab993987ae29cb39cc52054d7346db082f Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Sun, 9 Feb 2020 11:59:01 +0100 Subject: [PATCH] powerpc/powernv: 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. Signed-off-by: Greg Kroah-Hartman Reviewed-by: Oliver O'Halloran Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200209105901.1620958-6-gregkh@linuxfoundation.org --- arch/powerpc/platforms/powernv/memtrace.c | 7 ---- arch/powerpc/platforms/powernv/opal-imc.c | 24 ++++---------- arch/powerpc/platforms/powernv/pci-ioda.c | 5 --- arch/powerpc/platforms/powernv/vas-debug.c | 37 ++-------------------- 4 files changed, 10 insertions(+), 63 deletions(-) diff --git a/arch/powerpc/platforms/powernv/memtrace.c b/arch/powerpc/platforms/powernv/memtrace.c index eb2e75dac369a..d6d64f8718e6f 100644 --- a/arch/powerpc/platforms/powernv/memtrace.c +++ b/arch/powerpc/platforms/powernv/memtrace.c @@ -187,11 +187,6 @@ static int memtrace_init_debugfs(void) snprintf(ent->name, 16, "%08x", ent->nid); dir = debugfs_create_dir(ent->name, memtrace_debugfs_dir); - if (!dir) { - pr_err("Failed to create debugfs directory for node %d\n", - ent->nid); - return -1; - } ent->dir = dir; debugfs_create_file("trace", 0400, dir, ent, &memtrace_fops); @@ -314,8 +309,6 @@ static int memtrace_init(void) { memtrace_debugfs_dir = debugfs_create_dir("memtrace", powerpc_debugfs_root); - if (!memtrace_debugfs_dir) - return -1; debugfs_create_file("enable", 0600, memtrace_debugfs_dir, NULL, &memtrace_init_fops); diff --git a/arch/powerpc/platforms/powernv/opal-imc.c b/arch/powerpc/platforms/powernv/opal-imc.c index 000b350d4060c..968b9a4d1cd93 100644 --- a/arch/powerpc/platforms/powernv/opal-imc.c +++ b/arch/powerpc/platforms/powernv/opal-imc.c @@ -35,11 +35,10 @@ static int imc_mem_set(void *data, u64 val) } DEFINE_DEBUGFS_ATTRIBUTE(fops_imc_x64, imc_mem_get, imc_mem_set, "0x%016llx\n"); -static struct dentry *imc_debugfs_create_x64(const char *name, umode_t mode, - struct dentry *parent, u64 *value) +static void imc_debugfs_create_x64(const char *name, umode_t mode, + struct dentry *parent, u64 *value) { - return debugfs_create_file_unsafe(name, mode, parent, - value, &fops_imc_x64); + debugfs_create_file_unsafe(name, mode, parent, value, &fops_imc_x64); } /* @@ -59,9 +58,6 @@ static void export_imc_mode_and_cmd(struct device_node *node, imc_debugfs_parent = debugfs_create_dir("imc", powerpc_debugfs_root); - if (!imc_debugfs_parent) - return; - if (of_property_read_u32(node, "cb_offset", &cb_offset)) cb_offset = IMC_CNTL_BLK_OFFSET; @@ -69,21 +65,15 @@ static void export_imc_mode_and_cmd(struct device_node *node, loc = (u64)(ptr->vbase) + cb_offset; imc_mode_addr = (u64 *)(loc + IMC_CNTL_BLK_MODE_OFFSET); sprintf(mode, "imc_mode_%d", (u32)(ptr->id)); - if (!imc_debugfs_create_x64(mode, 0600, imc_debugfs_parent, - imc_mode_addr)) - goto err; + imc_debugfs_create_x64(mode, 0600, imc_debugfs_parent, + imc_mode_addr); imc_cmd_addr = (u64 *)(loc + IMC_CNTL_BLK_CMD_OFFSET); sprintf(cmd, "imc_cmd_%d", (u32)(ptr->id)); - if (!imc_debugfs_create_x64(cmd, 0600, imc_debugfs_parent, - imc_cmd_addr)) - goto err; + imc_debugfs_create_x64(cmd, 0600, imc_debugfs_parent, + imc_cmd_addr); ptr++; } - return; - -err: - debugfs_remove_recursive(imc_debugfs_parent); } /* diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 22c22cd7bd82e..57d3a6af1d52c 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -3174,11 +3174,6 @@ static void pnv_pci_ioda_create_dbgfs(void) sprintf(name, "PCI%04x", hose->global_number); phb->dbgfs = debugfs_create_dir(name, powerpc_debugfs_root); - if (!phb->dbgfs) { - pr_warn("%s: Error on creating debugfs on PHB#%x\n", - __func__, hose->global_number); - continue; - } debugfs_create_file_unsafe("dump_diag_regs", 0200, phb->dbgfs, phb, &pnv_pci_diag_data_fops); diff --git a/arch/powerpc/platforms/powernv/vas-debug.c b/arch/powerpc/platforms/powernv/vas-debug.c index 09e63df53c30a..44035a3d6414d 100644 --- a/arch/powerpc/platforms/powernv/vas-debug.c +++ b/arch/powerpc/platforms/powernv/vas-debug.c @@ -115,7 +115,7 @@ void vas_window_free_dbgdir(struct vas_window *window) void vas_window_init_dbgdir(struct vas_window *window) { - struct dentry *f, *d; + struct dentry *d; if (!window->vinst->dbgdir) return; @@ -127,28 +127,10 @@ void vas_window_init_dbgdir(struct vas_window *window) snprintf(window->dbgname, 16, "w%d", window->winid); d = debugfs_create_dir(window->dbgname, window->vinst->dbgdir); - if (IS_ERR(d)) - goto free_name; - window->dbgdir = d; - f = debugfs_create_file("info", 0444, d, window, &info_fops); - if (IS_ERR(f)) - goto remove_dir; - - f = debugfs_create_file("hvwc", 0444, d, window, &hvwc_fops); - if (IS_ERR(f)) - goto remove_dir; - - return; - -remove_dir: - debugfs_remove_recursive(window->dbgdir); - window->dbgdir = NULL; - -free_name: - kfree(window->dbgname); - window->dbgname = NULL; + debugfs_create_file("info", 0444, d, window, &info_fops); + debugfs_create_file("hvwc", 0444, d, window, &hvwc_fops); } void vas_instance_init_dbgdir(struct vas_instance *vinst) @@ -156,8 +138,6 @@ void vas_instance_init_dbgdir(struct vas_instance *vinst) struct dentry *d; vas_init_dbgdir(); - if (!vas_debugfs) - return; vinst->dbgname = kzalloc(16, GFP_KERNEL); if (!vinst->dbgname) @@ -166,16 +146,7 @@ void vas_instance_init_dbgdir(struct vas_instance *vinst) snprintf(vinst->dbgname, 16, "v%d", vinst->vas_id); d = debugfs_create_dir(vinst->dbgname, vas_debugfs); - if (IS_ERR(d)) - goto free_name; - vinst->dbgdir = d; - return; - -free_name: - kfree(vinst->dbgname); - vinst->dbgname = NULL; - vinst->dbgdir = NULL; } /* @@ -191,6 +162,4 @@ void vas_init_dbgdir(void) first_time = false; vas_debugfs = debugfs_create_dir("vas", NULL); - if (IS_ERR(vas_debugfs)) - vas_debugfs = NULL; } -- 2.30.2