linux-kernel - Re: [PATCH] iio:proximity:hx9031as: Add TYHX HX9031AS/HX9023S sensor driver

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Date: Mon, 27 May 2024 11:14:16 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Andy Shevchenko <andy.shevchenko@...il.com>
Cc: oe-kbuild@...ts.linux.dev, Yasin Lee <yasin.lee.x@...look.com>,
	jic23@...nel.org, lkp@...el.com, oe-kbuild-all@...ts.linux.dev,
	lars@...afoo.de, swboyd@...omium.org, nuno.a@...log.com,
	u.kleine-koenig@...gutronix.de, linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org, yasin.lee.x@...il.com
Subject: Re: [PATCH] iio:proximity:hx9031as: Add TYHX HX9031AS/HX9023S sensor
 driver

On Sat, May 25, 2024 at 05:00:59PM +0300, Andy Shevchenko wrote:
> On Thu, May 23, 2024 at 3:42 PM Dan Carpenter <dan.carpenter@...aro.org> wrote:
> 
> 
> > 5e5a419c9407f6 Yasin Lee 2024-05-10  1110  static ssize_t hx9031as_raw_data_show(struct file *file, char __user *user_buf, size_t count, loff_t *ppos)
> > 5e5a419c9407f6 Yasin Lee 2024-05-10  1111  {
> > 5e5a419c9407f6 Yasin Lee 2024-05-10  1112       char buf[BUF_SIZE] = {0};
> > 5e5a419c9407f6 Yasin Lee 2024-05-10  1113       char *p = buf;
> > 5e5a419c9407f6 Yasin Lee 2024-05-10  1114       int ii = 0;
> > 5e5a419c9407f6 Yasin Lee 2024-05-10  1115
> > 5e5a419c9407f6 Yasin Lee 2024-05-10  1116       hx9031as_sample();
> > 5e5a419c9407f6 Yasin Lee 2024-05-10  1117       for (ii = 0; ii < HX9031AS_CH_NUM; ii++) {
> > 5e5a419c9407f6 Yasin Lee 2024-05-10 @1118               p += snprintf(p, PAGE_SIZE, "ch[%d]: DIFF=%-8d, RAW=%-8d, OFFSET=%-8d, BL=%-8d, LP=%-8d\n",
> >                                                                          ^^^^^^^^^
> 
> 
> > Also use scnprintf() instead of snprintf() unless you need to check the
> > results.
> 
> This is incorrect advice. You should recommend sysfs_emit() /
> sysfs_emit_at() in this kind of case.

No, this is not sysfs code.  It's debugfs.  The API is completely
different.

regards,
dan carpenter