From: Pagadala Yesu Anjaneyulu <pagadala.yesu.anjaneyulu@intel.com>
Date: Wed, 12 Mar 2025 22:22:25 +0000 (+0200)
Subject: wifi: iwlwifi: mld: Add support for WIPHY_DEBUGFS_READ_FILE_OPS_MLD macro
X-Git-Tag: v6.15-rc1~160^2~20^2~26
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=4b8130a722eb3634a8cde1e8cb1b113e488df5ac;p=thirdparty%2Fkernel%2Flinux.git

wifi: iwlwifi: mld: Add support for WIPHY_DEBUGFS_READ_FILE_OPS_MLD macro

Introduced the WIPHY_DEBUGFS_READ_FILE_OPS_MLD macro to enable reading
data from the driver while holding the wiphy lock.
This will enable read operations with wiphy locked.

Signed-off-by: Pagadala Yesu Anjaneyulu <pagadala.yesu.anjaneyulu@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250313002008.b0ddb6b0a144.I1fab63f2c6f52fea61cc5d7b27775aed58adfd8d@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---

diff --git a/drivers/net/wireless/intel/iwlwifi/mld/debugfs.h b/drivers/net/wireless/intel/iwlwifi/mld/debugfs.h
index 13d97184a31fb..900aaed907756 100644
--- a/drivers/net/wireless/intel/iwlwifi/mld/debugfs.h
+++ b/drivers/net/wireless/intel/iwlwifi/mld/debugfs.h
@@ -121,6 +121,16 @@ static ssize_t __iwl_dbgfs_##name##_write(struct file *file,		\
 		.llseek = generic_file_llseek,				\
 	}
 
+#define WIPHY_DEBUGFS_READ_HANDLER_WRAPPER_MLD(name)			\
+static ssize_t iwl_dbgfs_##name##_read_handler(struct wiphy *wiphy,	\
+				       struct file *file, char *buf,	\
+				       size_t count, void *data)	\
+{									\
+	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);		\
+	struct iwl_mld *mld = IWL_MAC80211_GET_MLD(hw);			\
+	return iwl_dbgfs_##name##_read(mld, buf, count);		\
+}
+
 #define WIPHY_DEBUGFS_WRITE_HANDLER_WRAPPER_MLD(name)			\
 static ssize_t iwl_dbgfs_##name##_write_handler(struct wiphy *wiphy,	\
 				       struct file *file, char *buf,	\
@@ -147,6 +157,40 @@ static ssize_t __iwl_dbgfs_##name##_write(struct file *file,		\
 				NULL);					\
 }
 
+#define WIPHY_DEBUGFS_READ_WRAPPER_MLD(name)				\
+WIPHY_DEBUGFS_READ_HANDLER_WRAPPER_MLD(name)				\
+static ssize_t __iwl_dbgfs_##name##_read(struct file *file,		\
+					char __user *user_buf,		\
+					size_t count, loff_t *ppos)	\
+{									\
+	struct dbgfs_##name##_data *data = file->private_data;		\
+	struct iwl_mld *mld = data->arg;				\
+									\
+	if (!data->read_done) {						\
+		data->read_done = true;					\
+		data->rlen = wiphy_locked_debugfs_read(mld->wiphy,	\
+				file, data->buf, sizeof(data->buf),	\
+				user_buf, count, ppos,			\
+				iwl_dbgfs_##name##_read_handler, NULL);	\
+		return data->rlen;					\
+	}								\
+									\
+	if (data->rlen < 0)						\
+		return data->rlen;					\
+	return simple_read_from_buffer(user_buf, count, ppos,		\
+				       data->buf, data->rlen);		\
+}
+
+#define WIPHY_DEBUGFS_READ_FILE_OPS_MLD(name, bufsz)			\
+	MLD_DEBUGFS_OPEN_WRAPPER(name, bufsz, struct iwl_mld)		\
+	WIPHY_DEBUGFS_READ_WRAPPER_MLD(name)				\
+	static const struct file_operations iwl_dbgfs_##name##_ops = {	\
+		.read = __iwl_dbgfs_##name##_read,			\
+		.open = _iwl_dbgfs_##name##_open,			\
+		.llseek = generic_file_llseek,				\
+		.release = _iwl_dbgfs_release,				\
+	}
+
 #define WIPHY_DEBUGFS_WRITE_FILE_OPS_MLD(name, bufsz)			\
 	MLD_DEBUGFS_OPEN_WRAPPER(name, bufsz, struct iwl_mld)		\
 	WIPHY_DEBUGFS_WRITE_WRAPPER_MLD(name)				\