[igt-dev] [PATCH i-g-t] lib/igt_sysfs: move kick_snd_hda_intel() to igt_kmod.c

[Kamil Konieczny]

Hi Mauro,
On 2023-10-26 at 11:27:24 +0200, Mauro Carvalho Chehab wrote:
> From: Mauro Carvalho Chehab <mchehab at kernel.org>
> 
> This unbind function is now used only inside igt_kmod, and
> should be called only via igt_always_unload_audio_driver(),
> which does other required steps to unbind the audio driver.
> 
> So, move it to igt_kmod and make it static.
> 
> Suggested-by: Andrzej Hajda <andrzej.hajda at intel.com>
> Signed-off-by: Mauro Carvalho Chehab <mchehab at kernel.org>

Reviewed-by: Kamil Konieczny <kamil.konieczny at linux.intel.com>

> 
> ---
> 
> v4: place includes in alphabetic order
> v3: fix a typo on a message: cand ->can
> v2: added some missing includes
> ---
>  lib/igt_kmod.c  | 57 ++++++++++++++++++++++++++++++++++++++++++++++++-
>  lib/igt_sysfs.c | 52 --------------------------------------------
>  lib/igt_sysfs.h |  1 -
>  3 files changed, 56 insertions(+), 54 deletions(-)
> 
> diff --git a/lib/igt_kmod.c b/lib/igt_kmod.c
> index 4785d724aec8..e967c9bcdce0 100644
> --- a/lib/igt_kmod.c
> +++ b/lib/igt_kmod.c
> @@ -22,12 +22,15 @@
>   */
>  
>  #include <ctype.h>
> -#include <signal.h>
> +#include <dirent.h>
>  #include <errno.h>
>  #include <fcntl.h>
>  #include <pthread.h>
> +#include <signal.h>
>  #include <stdlib.h>
>  #include <string.h>
> +#include <sys/stat.h>
> +#include <sys/types.h>
>  #include <sys/utsname.h>
>  #include <unistd.h>
>  
> @@ -437,6 +440,58 @@ igt_intel_driver_load(const char *opts, const char *driver)
>  	return 0;
>  }
>  
> +/**
> + * kick_snd_hda_intel:
> + *
> + * This function unbinds the snd_hda_intel driver so the module can be
> + * unloaded.
> + *
> + */
> +static void kick_snd_hda_intel(void)
> +{
> +	DIR *dir;
> +	struct dirent *snd_hda;
> +	int fd; size_t len;
> +
> +	const char *dpath = "/sys/bus/pci/drivers/snd_hda_intel";
> +	const char *path = "/sys/bus/pci/drivers/snd_hda_intel/unbind";
> +	const char *devid = "0000:";
> +
> +	fd = open(path, O_WRONLY);
> +	if (fd < 0) {
> +		return;
> +	}
> +
> +	dir = opendir(dpath);
> +	if (!dir)
> +		goto out;
> +
> +	len = strlen(devid);
> +	while ((snd_hda = readdir(dir))) {
> +		struct stat st;
> +		char fpath[PATH_MAX];
> +
> +		if (*snd_hda->d_name == '.')
> +			continue;
> +
> +		snprintf(fpath, sizeof(fpath), "%s/%s", dpath, snd_hda->d_name);
> +		if (lstat(fpath, &st))
> +			continue;
> +
> +		if (!S_ISLNK(st.st_mode))
> +			continue;
> +
> +		if (!strncmp(devid, snd_hda->d_name, len)) {
> +			igt_ignore_warn(write(fd, snd_hda->d_name,
> +					strlen(snd_hda->d_name)));
> +		}
> +	}
> +
> +	closedir(dir);
> +out:
> +	close(fd);
> +}
> +
>  static int igt_always_unload_audio_driver(char **who)
>  {
>  	int ret;
> diff --git a/lib/igt_sysfs.c b/lib/igt_sysfs.c
> index 83182020b498..567b4f6d5f03 100644
> --- a/lib/igt_sysfs.c
> +++ b/lib/igt_sysfs.c
> @@ -856,58 +856,6 @@ void bind_fbcon(bool enable)
>  	bind_con("frame buffer device", enable);
>  }
>  
> -/**
> - * kick_snd_hda_intel:
> - *
> - * This functions unbinds the snd_hda_intel driver so the module cand be
> - * unloaded.
> - *
> - */
> -void kick_snd_hda_intel(void)
> -{
> -	DIR *dir;
> -	struct dirent *snd_hda;
> -	int fd; size_t len;
> -
> -	const char *dpath = "/sys/bus/pci/drivers/snd_hda_intel";
> -	const char *path = "/sys/bus/pci/drivers/snd_hda_intel/unbind";
> -	const char *devid = "0000:";
> -
> -	fd = open(path, O_WRONLY);
> -	if (fd < 0) {
> -		return;
> -	}
> -
> -	dir = opendir(dpath);
> -	if (!dir)
> -		goto out;
> -
> -	len = strlen(devid);
> -	while ((snd_hda = readdir(dir))) {
> -		struct stat st;
> -		char fpath[PATH_MAX];
> -
> -		if (*snd_hda->d_name == '.')
> -			continue;
> -
> -		snprintf(fpath, sizeof(fpath), "%s/%s", dpath, snd_hda->d_name);
> -		if (lstat(fpath, &st))
> -			continue;
> -
> -		if (!S_ISLNK(st.st_mode))
> -			continue;
> -
> -		if (!strncmp(devid, snd_hda->d_name, len)) {
> -			igt_ignore_warn(write(fd, snd_hda->d_name,
> -					strlen(snd_hda->d_name)));
> -		}
> -	}
> -
> -	closedir(dir);
> -out:
> -	close(fd);
> -}
> -
>  static int fbcon_cursor_blink_fd = -1;
>  static char fbcon_cursor_blink_prev_value[2];
>  
> diff --git a/lib/igt_sysfs.h b/lib/igt_sysfs.h
> index 0087c03b706a..e804cf8e109d 100644
> --- a/lib/igt_sysfs.h
> +++ b/lib/igt_sysfs.h
> @@ -135,7 +135,6 @@ bool __igt_sysfs_set_boolean(int dir, const char *attr, bool value);
>  void igt_sysfs_set_boolean(int dir, const char *attr, bool value);
>  
>  void bind_fbcon(bool enable);
> -void kick_snd_hda_intel(void);
>  void fbcon_blink_enable(bool enable);
>  
>  /**
> -- 
> 2.41.0
>