From: Amitkumar Karwar <akarwar@marvell.com>
Date: Mon, 14 Dec 2015 12:15:10 +0000 (-0800)
Subject: mwifiex: add debugfs file for testing reset of card
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=76ae3e26ea4341cd18705b6f78d1dbf10bb9de35;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

mwifiex: add debugfs file for testing reset of card

This provides an option for user to power cycle the card.
It will be used to change the firmware without actually
rebooting the system.

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---

diff --git a/drivers/net/wireless/marvell/mwifiex/debugfs.c b/drivers/net/wireless/marvell/mwifiex/debugfs.c
index 9824d8dd2b44..5e5562909d9f 100644
--- a/drivers/net/wireless/marvell/mwifiex/debugfs.c
+++ b/drivers/net/wireless/marvell/mwifiex/debugfs.c
@@ -906,6 +906,34 @@ mwifiex_timeshare_coex_write(struct file *file, const char __user *ubuf,
 		return count;
 }
 
+static ssize_t
+mwifiex_reset_write(struct file *file,
+		    const char __user *ubuf, size_t count, loff_t *ppos)
+{
+	struct mwifiex_private *priv = file->private_data;
+	struct mwifiex_adapter *adapter = priv->adapter;
+	char cmd;
+	bool result;
+
+	if (copy_from_user(&cmd, ubuf, sizeof(cmd)))
+		return -EFAULT;
+
+	if (strtobool(&cmd, &result))
+		return -EINVAL;
+
+	if (!result)
+		return -EINVAL;
+
+	if (adapter->if_ops.card_reset) {
+		dev_info(adapter->dev, "Resetting per request\n");
+		adapter->hw_status = MWIFIEX_HW_STATUS_RESET;
+		mwifiex_cancel_all_pending_cmd(adapter);
+		adapter->if_ops.card_reset(adapter);
+	}
+
+	return count;
+}
+
 #define MWIFIEX_DFS_ADD_FILE(name) do {                                 \
 	if (!debugfs_create_file(#name, 0644, priv->dfs_dev_dir,        \
 			priv, &mwifiex_dfs_##name##_fops))              \
@@ -943,6 +971,7 @@ MWIFIEX_DFS_FILE_OPS(hscfg);
 MWIFIEX_DFS_FILE_OPS(histogram);
 MWIFIEX_DFS_FILE_OPS(debug_mask);
 MWIFIEX_DFS_FILE_OPS(timeshare_coex);
+MWIFIEX_DFS_FILE_WRITE_OPS(reset);
 
 /*
  * This function creates the debug FS directory structure and the files.
@@ -970,6 +999,7 @@ mwifiex_dev_debugfs_init(struct mwifiex_private *priv)
 	MWIFIEX_DFS_ADD_FILE(histogram);
 	MWIFIEX_DFS_ADD_FILE(debug_mask);
 	MWIFIEX_DFS_ADD_FILE(timeshare_coex);
+	MWIFIEX_DFS_ADD_FILE(reset);
 }
 
 /*