linux-kernel - Re: [PATCH v2 4/4] remoteproc: debugfs: Remove state entry which is duplicated is sysfs

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Date:   Tue, 18 Oct 2016 15:17:10 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Matt Redfearn <matt.redfearn@...tec.com>
Cc:     Ohad Ben-Cohen <ohad@...ery.com>, linux-remoteproc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 4/4] remoteproc: debugfs: Remove state entry which is
 duplicated is sysfs

On Mon 17 Oct 08:49 PDT 2016, Matt Redfearn wrote:

> Since there is now an always available state file in sysfs with the same
> function as this one in debugfs, remove the redundant entry.
> 
> Signed-off-by: Matt Redfearn <matt.redfearn@...tec.com>

Acked-by: Bjorn Andersson <bjorn.andersson@...aro.org>

Regards,
Bjorn

> ---
> 
> Changes in v2: None
> 
>  drivers/remoteproc/remoteproc_debugfs.c | 71 ---------------------------------
>  1 file changed, 71 deletions(-)
> 
> diff --git a/drivers/remoteproc/remoteproc_debugfs.c b/drivers/remoteproc/remoteproc_debugfs.c
> index 374797206c79..1c122e230cec 100644
> --- a/drivers/remoteproc/remoteproc_debugfs.c
> +++ b/drivers/remoteproc/remoteproc_debugfs.c
> @@ -59,75 +59,6 @@ static const struct file_operations trace_rproc_ops = {
>  	.llseek	= generic_file_llseek,
>  };
>  
> -/*
> - * A state-to-string lookup table, for exposing a human readable state
> - * via debugfs. Always keep in sync with enum rproc_state
> - */
> -static const char * const rproc_state_string[] = {
> -	"offline",
> -	"suspended",
> -	"running",
> -	"crashed",
> -	"invalid",
> -};
> -
> -/* expose the state of the remote processor via debugfs */
> -static ssize_t rproc_state_read(struct file *filp, char __user *userbuf,
> -				size_t count, loff_t *ppos)
> -{
> -	struct rproc *rproc = filp->private_data;
> -	unsigned int state;
> -	char buf[30];
> -	int i;
> -
> -	state = rproc->state > RPROC_LAST ? RPROC_LAST : rproc->state;
> -
> -	i = scnprintf(buf, 30, "%.28s (%d)\n", rproc_state_string[state],
> -		      rproc->state);
> -
> -	return simple_read_from_buffer(userbuf, count, ppos, buf, i);
> -}
> -
> -static ssize_t rproc_state_write(struct file *filp, const char __user *userbuf,
> -				 size_t count, loff_t *ppos)
> -{
> -	struct rproc *rproc = filp->private_data;
> -	char buf[10];
> -	int ret;
> -
> -	if (count > sizeof(buf) || count <= 0)
> -		return -EINVAL;
> -
> -	ret = copy_from_user(buf, userbuf, count);
> -	if (ret)
> -		return -EFAULT;
> -
> -	if (buf[count - 1] == '\n')
> -		buf[count - 1] = '\0';
> -
> -	if (!strncmp(buf, "start", count)) {
> -		ret = rproc_boot(rproc);
> -		if (ret) {
> -			dev_err(&rproc->dev, "Boot failed: %d\n", ret);
> -			return ret;
> -		}
> -	} else if (!strncmp(buf, "stop", count)) {
> -		rproc_shutdown(rproc);
> -	} else {
> -		dev_err(&rproc->dev, "Unrecognised option: %s\n", buf);
> -		return -EINVAL;
> -	}
> -
> -	return count;
> -}
> -
> -static const struct file_operations rproc_state_ops = {
> -	.read = rproc_state_read,
> -	.write = rproc_state_write,
> -	.open = simple_open,
> -	.llseek	= generic_file_llseek,
> -};
> -
>  /* expose the name of the remote processor via debugfs */
>  static ssize_t rproc_name_read(struct file *filp, char __user *userbuf,
>  			       size_t count, loff_t *ppos)
> @@ -265,8 +196,6 @@ void rproc_create_debug_dir(struct rproc *rproc)
>  
>  	debugfs_create_file("name", 0400, rproc->dbg_dir,
>  			    rproc, &rproc_name_ops);
> -	debugfs_create_file("state", 0400, rproc->dbg_dir,
> -			    rproc, &rproc_state_ops);
>  	debugfs_create_file("recovery", 0400, rproc->dbg_dir,
>  			    rproc, &rproc_recovery_ops);
>  }
> -- 
> 2.7.4
>