linux-kernel - [PATCH 4.19 39/40] wil6210: remove reset file from debugfs

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Date:   Mon, 20 Apr 2020 14:39:49 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Karthick Gopalasubramanian <kargop@...eaurora.org>,
        Maya Erez <merez@...eaurora.org>,
        Kalle Valo <kvalo@...eaurora.org>,
        Lee Jones <lee.jones@...aro.org>
Subject: [PATCH 4.19 39/40] wil6210: remove reset file from debugfs

From: Karthick Gopalasubramanian <kargop@...eaurora.org>

commit 32dcfe8316cdbd885542967c0c85f5b9de78874b upstream.

Reset file is not used and may cause race conditions
with operational driver if used.

Signed-off-by: Karthick Gopalasubramanian <kargop@...eaurora.org>
Signed-off-by: Maya Erez <merez@...eaurora.org>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
Signed-off-by: Lee Jones <lee.jones@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/wireless/ath/wil6210/debugfs.c |   27 ---------------------------
 1 file changed, 27 deletions(-)

--- a/drivers/net/wireless/ath/wil6210/debugfs.c
+++ b/drivers/net/wireless/ath/wil6210/debugfs.c
@@ -730,32 +730,6 @@ struct dentry *wil_debugfs_create_ioblob
 	return debugfs_create_file(name, mode, parent, wil_blob, &fops_ioblob);
 }
 
-/*---reset---*/
-static ssize_t wil_write_file_reset(struct file *file, const char __user *buf,
-				    size_t len, loff_t *ppos)
-{
-	struct wil6210_priv *wil = file->private_data;
-	struct net_device *ndev = wil->main_ndev;
-
-	/**
-	 * BUG:
-	 * this code does NOT sync device state with the rest of system
-	 * use with care, debug only!!!
-	 */
-	rtnl_lock();
-	dev_close(ndev);
-	ndev->flags &= ~IFF_UP;
-	rtnl_unlock();
-	wil_reset(wil, true);
-
-	return len;
-}
-
-static const struct file_operations fops_reset = {
-	.write = wil_write_file_reset,
-	.open  = simple_open,
-};
-
 /*---write channel 1..4 to rxon for it, 0 to rxoff---*/
 static ssize_t wil_write_file_rxon(struct file *file, const char __user *buf,
 				   size_t len, loff_t *ppos)
@@ -2461,7 +2435,6 @@ static const struct {
 	{"desc",	0444,		&fops_txdesc},
 	{"bf",		0444,		&fops_bf},
 	{"mem_val",	0644,		&fops_memread},
-	{"reset",	0244,		&fops_reset},
 	{"rxon",	0244,		&fops_rxon},
 	{"tx_mgmt",	0244,		&fops_txmgmt},
 	{"wmi_send", 0244,		&fops_wmi},