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

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Message-ID: <1476719341-11651-5-git-send-email-matt.redfearn@imgtec.com>
Date:   Mon, 17 Oct 2016 16:49:01 +0100
From:   Matt Redfearn <matt.redfearn@...tec.com>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Ohad Ben-Cohen <ohad@...ery.com>
CC:     <linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        "Matt Redfearn" <matt.redfearn@...tec.com>
Subject: [PATCH v2 4/4] remoteproc: debugfs: Remove state entry which is duplicated is sysfs

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>
---

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