linux-kernel - Re: [PATCH 4/5] platform/x86: think-lmi: fix column limit overflow

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Message-Id: <572f5363-c23b-435f-a36b-7b708704a3c1@app.fastmail.com>
Date: Tue, 23 Dec 2025 15:34:34 -0500
From: "Mark Pearson" <mpearson-lenovo@...ebb.ca>
To: "Benjamin Philip" <benjamin.philip495@...il.com>,
 "platform-driver-x86@...r.kernel.org" <platform-driver-x86@...r.kernel.org>,
 linux-kernel@...r.kernel.org
Cc: "Derek J . Clark" <derekjohn.clark@...il.com>,
 "Hans de Goede" <hansg@...nel.org>,
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Subject: Re: [PATCH 4/5] platform/x86: think-lmi: fix column limit overflow

On Tue, Dec 23, 2025, at 2:24 PM, Benjamin Philip wrote:
> This commit handles some column limit overflows (that occur after fixing
> their alignment), i.e. the following check:
>
> CHECK: line length of ... exceeds 100 columns
>
> by defining a constant opt, and replacing the offending
> expression with opt.
>
> Signed-off-by: Benjamin Philip <benjamin.philip495@...il.com>
> ---
>  drivers/platform/x86/lenovo/think-lmi.c | 31 +++++++++++++++----------
>  1 file changed, 19 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/platform/x86/lenovo/think-lmi.c
> b/drivers/platform/x86/lenovo/think-lmi.c
> index 1ada4d800383..07ba0d84720a 100644
> --- a/drivers/platform/x86/lenovo/think-lmi.c
> +++ b/drivers/platform/x86/lenovo/think-lmi.c
> @@ -1083,12 +1083,13 @@ static ssize_t type_show(struct kobject *kobj,
> struct kobj_attribute *attr,
>  }
>
>  static ssize_t current_value_store(struct kobject *kobj,
> -		struct kobj_attribute *attr,
> -		const char *buf, size_t count)
> +				   struct kobj_attribute *attr, const char *buf,
> +				   size_t count)
>  {
>  	struct tlmi_attr_setting *setting = to_tlmi_attr_setting(kobj);
>  	char *set_str = NULL, *new_setting = NULL;
>  	char *auth_str = NULL;
> +	const char *opt;
>  	int ret;
>
>  	if (!tlmi_priv.can_set_bios_settings)
> @@ -1163,10 +1164,11 @@ static ssize_t current_value_store(struct kobject *kobj,
>  			ret = tlmi_save_bios_settings("");
>  	} else { /* old non-opcode based authentication method (deprecated) */
>  		if (tlmi_priv.pwd_admin->pwd_enabled && tlmi_priv.pwd_admin->password[0]) {
> +			opt = encoding_options[tlmi_priv.pwd_admin->encoding];
>  			auth_str = kasprintf(GFP_KERNEL, "%s,%s,%s;",
> -					tlmi_priv.pwd_admin->password,
> -					encoding_options[tlmi_priv.pwd_admin->encoding],
> -					tlmi_priv.pwd_admin->kbdlang);
> +					     tlmi_priv.pwd_admin->password,
> +					     opt,
> +					     tlmi_priv.pwd_admin->kbdlang);
>  			if (!auth_str) {
>  				ret = -ENOMEM;
>  				goto out;
> @@ -1299,6 +1301,7 @@ static ssize_t save_settings_store(struct
> kobject *kobj, struct kobj_attribute *
>  				   const char *buf, size_t count)
>  {
>  	char *auth_str = NULL;
> +	const char *opt;
>  	int ret = 0;
>  	int cmd;
>
> @@ -1347,9 +1350,10 @@ static ssize_t save_settings_store(struct
> kobject *kobj, struct kobj_attribute *
>  			ret = tlmi_save_bios_settings("");
>  		} else { /* old non-opcode based authentication method (deprecated) */
>  			if (tlmi_priv.pwd_admin->pwd_enabled && tlmi_priv.pwd_admin->password[0]) {
> +				opt = encoding_options[tlmi_priv.pwd_admin->encoding];
>  				auth_str = kasprintf(GFP_KERNEL, "%s,%s,%s;",
>  						     tlmi_priv.pwd_admin->password,
> -						     encoding_options[tlmi_priv.pwd_admin->encoding],
> +						     opt,
>  						     tlmi_priv.pwd_admin->kbdlang);
>  				if (!auth_str) {
>  					ret = -ENOMEM;
> @@ -1381,11 +1385,13 @@ static ssize_t save_settings_store(struct
> kobject *kobj, struct kobj_attribute *
>  static struct kobj_attribute save_settings = __ATTR_RW(save_settings);
>
>  /* ---- Debug 
> interface---------------------------------------------------------
> */
> -static ssize_t debug_cmd_store(struct kobject *kobj, struct
> kobj_attribute *attr,
> -				const char *buf, size_t count)
> +static ssize_t debug_cmd_store(struct kobject *kobj,
> +			       struct kobj_attribute *attr, const char *buf,
> +			       size_t count)
>  {
>  	char *set_str = NULL, *new_setting = NULL;
>  	char *auth_str = NULL;
> +	const char *opt;
>  	int ret;
>
>  	if (!tlmi_priv.can_debug_cmd)
> @@ -1397,10 +1403,11 @@ static ssize_t debug_cmd_store(struct kobject
> *kobj, struct kobj_attribute *attr
>  		return -ENOMEM;
>
>  	if (tlmi_priv.pwd_admin->pwd_enabled && tlmi_priv.pwd_admin->password[0]) {
> +		opt = encoding_options[tlmi_priv.pwd_admin->encoding];
>  		auth_str = kasprintf(GFP_KERNEL, "%s,%s,%s;",
> -				tlmi_priv.pwd_admin->password,
> -				encoding_options[tlmi_priv.pwd_admin->encoding],
> -				tlmi_priv.pwd_admin->kbdlang);
> +				     tlmi_priv.pwd_admin->password,
> +				     opt,
> +				     tlmi_priv.pwd_admin->kbdlang);
>  		if (!auth_str) {
>  			ret = -ENOMEM;
>  			goto out;
> @@ -1775,7 +1782,7 @@ static int tlmi_analyze(struct wmi_device *wdev)
>  						ffs(tlmi_priv.pwdcfg.ext.hdd_user_password) - 1;
>  			}
>  			if (tlmi_priv.pwdcfg.ext.nvme_user_password ||
> -					tlmi_priv.pwdcfg.ext.nvme_master_password) {
> +			    tlmi_priv.pwdcfg.ext.nvme_master_password) {
>  				tlmi_priv.pwd_nvme->pwd_enabled = true;
>  				if (tlmi_priv.pwdcfg.ext.nvme_master_password)
>  					tlmi_priv.pwd_nvme->index =
> -- 
> 2.52.0

I'll defer to the pdx86 reviewers for this set of changes.

This seems to me to make things more complicated than needed, purely to address a 100 column limit. I personally don't like the change.

Nothing wrong with the code, and if more experienced maintainers prefer it, I'm happy to defer to them. Otherwise it seems to me noise for the sake of noise I'm afraid

Mark