drivers/scsi/qla2xxx/qla_dfs.c - kernel/quantenna - Git at Google

 /*
  * QLogic Fibre Channel HBA Driver
  * Copyright (c)  2003-2014 QLogic Corporation
  *
  * See LICENSE.qla2xxx for copyright and licensing details.
  */
 #include "qla_def.h"

 #include <linux/debugfs.h>
 #include <linux/seq_file.h>

 static struct dentry *qla2x00_dfs_root;
 static atomic_t qla2x00_dfs_root_count;

 static int
 qla2x00_dfs_tgt_sess_show(struct seq_file *s, void *unused)
 {
 	scsi_qla_host_t *vha = s->private;
 	struct qla_hw_data *ha = vha->hw;
 	unsigned long flags;
 	struct qla_tgt_sess *sess = NULL;
 	struct qla_tgt *tgt= vha->vha_tgt.qla_tgt;

 	seq_printf(s, "%s\n",vha->host_str);
 	if (tgt) {
 		seq_printf(s, "Port ID   Port Name                Handle\n");

 		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 		list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
 			seq_printf(s, "%02x:%02x:%02x  %8phC  %d\n",
 					   sess->s_id.b.domain,sess->s_id.b.area,
 					   sess->s_id.b.al_pa,	sess->port_name,
 					   sess->loop_id);
 		}
 		spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 	}

 	return 0;
 }

 static int
 qla2x00_dfs_tgt_sess_open(struct inode *inode, struct file *file)
 {
 	scsi_qla_host_t *vha = inode->i_private;
 	return single_open(file, qla2x00_dfs_tgt_sess_show, vha);
 }


 static const struct file_operations dfs_tgt_sess_ops = {
 	.open		= qla2x00_dfs_tgt_sess_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
 	.release	= single_release,
 };

 static int
 qla_dfs_fw_resource_cnt_show(struct seq_file *s, void *unused)
 {
 	struct scsi_qla_host *vha = s->private;
 	struct qla_hw_data *ha = vha->hw;

 	seq_puts(s, "FW Resource count\n\n");
 	seq_printf(s, "Original TGT exchg count[%d]\n",
 	    ha->orig_fw_tgt_xcb_count);
 	seq_printf(s, "current TGT exchg count[%d]\n",
 	    ha->cur_fw_tgt_xcb_count);
 	seq_printf(s, "original Initiator Exchange count[%d]\n",
 	    ha->orig_fw_xcb_count);
 	seq_printf(s, "Current Initiator Exchange count[%d]\n",
 	    ha->cur_fw_xcb_count);
 	seq_printf(s, "Original IOCB count[%d]\n", ha->orig_fw_iocb_count);
 	seq_printf(s, "Current IOCB count[%d]\n", ha->cur_fw_iocb_count);
 	seq_printf(s, "MAX VP count[%d]\n", ha->max_npiv_vports);
 	seq_printf(s, "MAX FCF count[%d]\n", ha->fw_max_fcf_count);

 	return 0;
 }

 static int
 qla_dfs_fw_resource_cnt_open(struct inode *inode, struct file *file)
 {
 	struct scsi_qla_host *vha = inode->i_private;
 	return single_open(file, qla_dfs_fw_resource_cnt_show, vha);
 }

 static const struct file_operations dfs_fw_resource_cnt_ops = {
 	.open           = qla_dfs_fw_resource_cnt_open,
 	.read           = seq_read,
 	.llseek         = seq_lseek,
 	.release        = single_release,
 };

 static int
 qla_dfs_tgt_counters_show(struct seq_file *s, void *unused)
 {
 	struct scsi_qla_host *vha = s->private;

 	seq_puts(s, "Target Counters\n");
 	seq_printf(s, "qla_core_sbt_cmd = %lld\n",
 		vha->tgt_counters.qla_core_sbt_cmd);
 	seq_printf(s, "qla_core_ret_sta_ctio = %lld\n",
 		vha->tgt_counters.qla_core_ret_sta_ctio);
 	seq_printf(s, "qla_core_ret_ctio = %lld\n",
 		vha->tgt_counters.qla_core_ret_ctio);
 	seq_printf(s, "core_qla_que_buf = %lld\n",
 		vha->tgt_counters.core_qla_que_buf);
 	seq_printf(s, "core_qla_snd_status = %lld\n",
 		vha->tgt_counters.core_qla_snd_status);
 	seq_printf(s, "core_qla_free_cmd = %lld\n",
 		vha->tgt_counters.core_qla_free_cmd);
 	seq_printf(s, "num alloc iocb failed = %lld\n",
 		vha->tgt_counters.num_alloc_iocb_failed);
 	seq_printf(s, "num term exchange sent = %lld\n",
 		vha->tgt_counters.num_term_xchg_sent);
 	seq_printf(s, "num Q full sent = %lld\n",
 		vha->tgt_counters.num_q_full_sent);

 	return 0;
 }

 static int
 qla_dfs_tgt_counters_open(struct inode *inode, struct file *file)
 {
 	struct scsi_qla_host *vha = inode->i_private;
 	return single_open(file, qla_dfs_tgt_counters_show, vha);
 }

 static const struct file_operations dfs_tgt_counters_ops = {
 	.open           = qla_dfs_tgt_counters_open,
 	.read           = seq_read,
 	.llseek         = seq_lseek,
 	.release        = single_release,
 };

 static int
 qla2x00_dfs_fce_show(struct seq_file *s, void *unused)
 {
 	scsi_qla_host_t *vha = s->private;
 	uint32_t cnt;
 	uint32_t *fce;
 	uint64_t fce_start;
 	struct qla_hw_data *ha = vha->hw;

 	mutex_lock(&ha->fce_mutex);

 	seq_puts(s, "FCE Trace Buffer\n");
 	seq_printf(s, "In Pointer = %llx\n\n", (unsigned long long)ha->fce_wr);
 	seq_printf(s, "Base = %llx\n\n", (unsigned long long) ha->fce_dma);
 	seq_puts(s, "FCE Enable Registers\n");
 	seq_printf(s, "%08x %08x %08x %08x %08x %08x\n",
 	    ha->fce_mb[0], ha->fce_mb[2], ha->fce_mb[3], ha->fce_mb[4],
 	    ha->fce_mb[5], ha->fce_mb[6]);

 	fce = (uint32_t *) ha->fce;
 	fce_start = (unsigned long long) ha->fce_dma;
 	for (cnt = 0; cnt < fce_calc_size(ha->fce_bufs) / 4; cnt++) {
 		if (cnt % 8 == 0)
 			seq_printf(s, "\n%llx: ",
 			    (unsigned long long)((cnt * 4) + fce_start));
 		else
 			seq_putc(s, ' ');
 		seq_printf(s, "%08x", *fce++);
 	}

 	seq_puts(s, "\nEnd\n");

 	mutex_unlock(&ha->fce_mutex);

 	return 0;
 }

 static int
 qla2x00_dfs_fce_open(struct inode *inode, struct file *file)
 {
 	scsi_qla_host_t *vha = inode->i_private;
 	struct qla_hw_data *ha = vha->hw;
 	int rval;

 	if (!ha->flags.fce_enabled)
 		goto out;

 	mutex_lock(&ha->fce_mutex);

 	/* Pause tracing to flush FCE buffers. */
 	rval = qla2x00_disable_fce_trace(vha, &ha->fce_wr, &ha->fce_rd);
 	if (rval)
 		ql_dbg(ql_dbg_user, vha, 0x705c,
 		    "DebugFS: Unable to disable FCE (%d).\n", rval);

 	ha->flags.fce_enabled = 0;

 	mutex_unlock(&ha->fce_mutex);
 out:
 	return single_open(file, qla2x00_dfs_fce_show, vha);
 }

 static int
 qla2x00_dfs_fce_release(struct inode *inode, struct file *file)
 {
 	scsi_qla_host_t *vha = inode->i_private;
 	struct qla_hw_data *ha = vha->hw;
 	int rval;

 	if (ha->flags.fce_enabled)
 		goto out;

 	mutex_lock(&ha->fce_mutex);

 	/* Re-enable FCE tracing. */
 	ha->flags.fce_enabled = 1;
 	memset(ha->fce, 0, fce_calc_size(ha->fce_bufs));
 	rval = qla2x00_enable_fce_trace(vha, ha->fce_dma, ha->fce_bufs,
 	    ha->fce_mb, &ha->fce_bufs);
 	if (rval) {
 		ql_dbg(ql_dbg_user, vha, 0x700d,
 		    "DebugFS: Unable to reinitialize FCE (%d).\n", rval);
 		ha->flags.fce_enabled = 0;
 	}

 	mutex_unlock(&ha->fce_mutex);
 out:
 	return single_release(inode, file);
 }

 static const struct file_operations dfs_fce_ops = {
 	.open		= qla2x00_dfs_fce_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
 	.release	= qla2x00_dfs_fce_release,
 };

 int
 qla2x00_dfs_setup(scsi_qla_host_t *vha)
 {
 	struct qla_hw_data *ha = vha->hw;

 	if (!IS_QLA25XX(ha) && !IS_QLA81XX(ha) && !IS_QLA83XX(ha) &&
 	    !IS_QLA27XX(ha))
 		goto out;
 	if (!ha->fce)
 		goto out;

 	if (qla2x00_dfs_root)
 		goto create_dir;

 	atomic_set(&qla2x00_dfs_root_count, 0);
 	qla2x00_dfs_root = debugfs_create_dir(QLA2XXX_DRIVER_NAME, NULL);
 	if (!qla2x00_dfs_root) {
 		ql_log(ql_log_warn, vha, 0x00f7,
 		    "Unable to create debugfs root directory.\n");
 		goto out;
 	}

 create_dir:
 	if (ha->dfs_dir)
 		goto create_nodes;

 	mutex_init(&ha->fce_mutex);
 	ha->dfs_dir = debugfs_create_dir(vha->host_str, qla2x00_dfs_root);
 	if (!ha->dfs_dir) {
 		ql_log(ql_log_warn, vha, 0x00f8,
 		    "Unable to create debugfs ha directory.\n");
 		goto out;
 	}

 	atomic_inc(&qla2x00_dfs_root_count);

 create_nodes:
 	ha->dfs_fw_resource_cnt = debugfs_create_file("fw_resource_count",
 	    S_IRUSR, ha->dfs_dir, vha, &dfs_fw_resource_cnt_ops);
 	if (!ha->dfs_fw_resource_cnt) {
 		ql_log(ql_log_warn, vha, 0x00fd,
 		    "Unable to create debugFS fw_resource_count node.\n");
 		goto out;
 	}

 	ha->dfs_tgt_counters = debugfs_create_file("tgt_counters", S_IRUSR,
 	    ha->dfs_dir, vha, &dfs_tgt_counters_ops);
 	if (!ha->dfs_tgt_counters) {
 		ql_log(ql_log_warn, vha, 0xd301,
 		    "Unable to create debugFS tgt_counters node.\n");
 		goto out;
 	}

 	ha->dfs_fce = debugfs_create_file("fce", S_IRUSR, ha->dfs_dir, vha,
 	    &dfs_fce_ops);
 	if (!ha->dfs_fce) {
 		ql_log(ql_log_warn, vha, 0x00f9,
 		    "Unable to create debugfs fce node.\n");
 		goto out;
 	}

 	ha->tgt.dfs_tgt_sess = debugfs_create_file("tgt_sess",
 		S_IRUSR, ha->dfs_dir, vha, &dfs_tgt_sess_ops);
 	if (!ha->tgt.dfs_tgt_sess) {
 		ql_log(ql_log_warn, vha, 0xffff,
 			"Unable to create debugFS tgt_sess node.\n");
 		goto out;
 	}

 out:
 	return 0;
 }

 int
 qla2x00_dfs_remove(scsi_qla_host_t *vha)
 {
 	struct qla_hw_data *ha = vha->hw;

 	if (ha->tgt.dfs_tgt_sess) {
 		debugfs_remove(ha->tgt.dfs_tgt_sess);
 		ha->tgt.dfs_tgt_sess = NULL;
 	}

 	if (ha->dfs_fw_resource_cnt) {
 		debugfs_remove(ha->dfs_fw_resource_cnt);
 		ha->dfs_fw_resource_cnt = NULL;
 	}

 	if (ha->dfs_tgt_counters) {
 		debugfs_remove(ha->dfs_tgt_counters);
 		ha->dfs_tgt_counters = NULL;
 	}

 	if (ha->dfs_fce) {
 		debugfs_remove(ha->dfs_fce);
 		ha->dfs_fce = NULL;
 	}

 	if (ha->dfs_dir) {
 		debugfs_remove(ha->dfs_dir);
 		ha->dfs_dir = NULL;
 		atomic_dec(&qla2x00_dfs_root_count);
 	}

 	if (atomic_read(&qla2x00_dfs_root_count) == 0 &&
 	    qla2x00_dfs_root) {
 		debugfs_remove(qla2x00_dfs_root);
 		qla2x00_dfs_root = NULL;
 	}

 	return 0;
 }
	/*
	* QLogic Fibre Channel HBA Driver
	* Copyright (c) 2003-2014 QLogic Corporation
	*
	* See LICENSE.qla2xxx for copyright and licensing details.
	*/
	#include "qla_def.h"

	#include <linux/debugfs.h>
	#include <linux/seq_file.h>

	static struct dentry *qla2x00_dfs_root;
	static atomic_t qla2x00_dfs_root_count;

	static int
	qla2x00_dfs_tgt_sess_show(struct seq_file s, void unused)
	{
	scsi_qla_host_t *vha = s->private;
	struct qla_hw_data *ha = vha->hw;
	unsigned long flags;
	struct qla_tgt_sess *sess = NULL;
	struct qla_tgt *tgt= vha->vha_tgt.qla_tgt;

	seq_printf(s, "%s\n",vha->host_str);
	if (tgt) {
	seq_printf(s, "Port ID Port Name Handle\n");

	spin_lock_irqsave(&ha->tgt.sess_lock, flags);
	list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
	seq_printf(s, "%02x:%02x:%02x %8phC %d\n",
	sess->s_id.b.domain,sess->s_id.b.area,
	sess->s_id.b.al_pa, sess->port_name,
	sess->loop_id);
	}
	spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
	}

	return 0;
	}

	static int
	qla2x00_dfs_tgt_sess_open(struct inode inode, struct file file)
	{
	scsi_qla_host_t *vha = inode->i_private;
	return single_open(file, qla2x00_dfs_tgt_sess_show, vha);
	}


	static const struct file_operations dfs_tgt_sess_ops = {
	.open = qla2x00_dfs_tgt_sess_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
	};

	static int
	qla_dfs_fw_resource_cnt_show(struct seq_file s, void unused)
	{
	struct scsi_qla_host *vha = s->private;
	struct qla_hw_data *ha = vha->hw;

	seq_puts(s, "FW Resource count\n\n");
	seq_printf(s, "Original TGT exchg count[%d]\n",
	ha->orig_fw_tgt_xcb_count);
	seq_printf(s, "current TGT exchg count[%d]\n",
	ha->cur_fw_tgt_xcb_count);
	seq_printf(s, "original Initiator Exchange count[%d]\n",
	ha->orig_fw_xcb_count);
	seq_printf(s, "Current Initiator Exchange count[%d]\n",
	ha->cur_fw_xcb_count);
	seq_printf(s, "Original IOCB count[%d]\n", ha->orig_fw_iocb_count);
	seq_printf(s, "Current IOCB count[%d]\n", ha->cur_fw_iocb_count);
	seq_printf(s, "MAX VP count[%d]\n", ha->max_npiv_vports);
	seq_printf(s, "MAX FCF count[%d]\n", ha->fw_max_fcf_count);

	return 0;
	}

	static int
	qla_dfs_fw_resource_cnt_open(struct inode inode, struct file file)
	{
	struct scsi_qla_host *vha = inode->i_private;
	return single_open(file, qla_dfs_fw_resource_cnt_show, vha);
	}

	static const struct file_operations dfs_fw_resource_cnt_ops = {
	.open = qla_dfs_fw_resource_cnt_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
	};

	static int
	qla_dfs_tgt_counters_show(struct seq_file s, void unused)
	{
	struct scsi_qla_host *vha = s->private;

	seq_puts(s, "Target Counters\n");
	seq_printf(s, "qla_core_sbt_cmd = %lld\n",
	vha->tgt_counters.qla_core_sbt_cmd);
	seq_printf(s, "qla_core_ret_sta_ctio = %lld\n",
	vha->tgt_counters.qla_core_ret_sta_ctio);
	seq_printf(s, "qla_core_ret_ctio = %lld\n",
	vha->tgt_counters.qla_core_ret_ctio);
	seq_printf(s, "core_qla_que_buf = %lld\n",
	vha->tgt_counters.core_qla_que_buf);
	seq_printf(s, "core_qla_snd_status = %lld\n",
	vha->tgt_counters.core_qla_snd_status);
	seq_printf(s, "core_qla_free_cmd = %lld\n",
	vha->tgt_counters.core_qla_free_cmd);
	seq_printf(s, "num alloc iocb failed = %lld\n",
	vha->tgt_counters.num_alloc_iocb_failed);
	seq_printf(s, "num term exchange sent = %lld\n",
	vha->tgt_counters.num_term_xchg_sent);
	seq_printf(s, "num Q full sent = %lld\n",
	vha->tgt_counters.num_q_full_sent);

	return 0;
	}

	static int
	qla_dfs_tgt_counters_open(struct inode inode, struct file file)
	{
	struct scsi_qla_host *vha = inode->i_private;
	return single_open(file, qla_dfs_tgt_counters_show, vha);
	}

	static const struct file_operations dfs_tgt_counters_ops = {
	.open = qla_dfs_tgt_counters_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
	};

	static int
	qla2x00_dfs_fce_show(struct seq_file s, void unused)
	{
	scsi_qla_host_t *vha = s->private;
	uint32_t cnt;
	uint32_t *fce;
	uint64_t fce_start;
	struct qla_hw_data *ha = vha->hw;

	mutex_lock(&ha->fce_mutex);

	seq_puts(s, "FCE Trace Buffer\n");
	seq_printf(s, "In Pointer = %llx\n\n", (unsigned long long)ha->fce_wr);
	seq_printf(s, "Base = %llx\n\n", (unsigned long long) ha->fce_dma);
	seq_puts(s, "FCE Enable Registers\n");
	seq_printf(s, "%08x %08x %08x %08x %08x %08x\n",
	ha->fce_mb[0], ha->fce_mb[2], ha->fce_mb[3], ha->fce_mb[4],
	ha->fce_mb[5], ha->fce_mb[6]);

	fce = (uint32_t *) ha->fce;
	fce_start = (unsigned long long) ha->fce_dma;
	for (cnt = 0; cnt < fce_calc_size(ha->fce_bufs) / 4; cnt++) {
	if (cnt % 8 == 0)
	seq_printf(s, "\n%llx: ",
	(unsigned long long)((cnt * 4) + fce_start));
	else
	seq_putc(s, ' ');
	seq_printf(s, "%08x", *fce++);
	}

	seq_puts(s, "\nEnd\n");

	mutex_unlock(&ha->fce_mutex);

	return 0;
	}

	static int
	qla2x00_dfs_fce_open(struct inode inode, struct file file)
	{
	scsi_qla_host_t *vha = inode->i_private;
	struct qla_hw_data *ha = vha->hw;
	int rval;

	if (!ha->flags.fce_enabled)
	goto out;

	mutex_lock(&ha->fce_mutex);

	/* Pause tracing to flush FCE buffers. */
	rval = qla2x00_disable_fce_trace(vha, &ha->fce_wr, &ha->fce_rd);
	if (rval)
	ql_dbg(ql_dbg_user, vha, 0x705c,
	"DebugFS: Unable to disable FCE (%d).\n", rval);

	ha->flags.fce_enabled = 0;

	mutex_unlock(&ha->fce_mutex);
	out:
	return single_open(file, qla2x00_dfs_fce_show, vha);
	}

	static int
	qla2x00_dfs_fce_release(struct inode inode, struct file file)
	{
	scsi_qla_host_t *vha = inode->i_private;
	struct qla_hw_data *ha = vha->hw;
	int rval;

	if (ha->flags.fce_enabled)
	goto out;

	mutex_lock(&ha->fce_mutex);

	/* Re-enable FCE tracing. */
	ha->flags.fce_enabled = 1;
	memset(ha->fce, 0, fce_calc_size(ha->fce_bufs));
	rval = qla2x00_enable_fce_trace(vha, ha->fce_dma, ha->fce_bufs,
	ha->fce_mb, &ha->fce_bufs);
	if (rval) {
	ql_dbg(ql_dbg_user, vha, 0x700d,
	"DebugFS: Unable to reinitialize FCE (%d).\n", rval);
	ha->flags.fce_enabled = 0;
	}

	mutex_unlock(&ha->fce_mutex);
	out:
	return single_release(inode, file);
	}

	static const struct file_operations dfs_fce_ops = {
	.open = qla2x00_dfs_fce_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = qla2x00_dfs_fce_release,
	};

	int
	qla2x00_dfs_setup(scsi_qla_host_t *vha)
	{
	struct qla_hw_data *ha = vha->hw;

	if (!IS_QLA25XX(ha) && !IS_QLA81XX(ha) && !IS_QLA83XX(ha) &&
	!IS_QLA27XX(ha))
	goto out;
	if (!ha->fce)
	goto out;

	if (qla2x00_dfs_root)
	goto create_dir;

	atomic_set(&qla2x00_dfs_root_count, 0);
	qla2x00_dfs_root = debugfs_create_dir(QLA2XXX_DRIVER_NAME, NULL);
	if (!qla2x00_dfs_root) {
	ql_log(ql_log_warn, vha, 0x00f7,
	"Unable to create debugfs root directory.\n");
	goto out;
	}

	create_dir:
	if (ha->dfs_dir)
	goto create_nodes;

	mutex_init(&ha->fce_mutex);
	ha->dfs_dir = debugfs_create_dir(vha->host_str, qla2x00_dfs_root);
	if (!ha->dfs_dir) {
	ql_log(ql_log_warn, vha, 0x00f8,
	"Unable to create debugfs ha directory.\n");
	goto out;
	}

	atomic_inc(&qla2x00_dfs_root_count);

	create_nodes:
	ha->dfs_fw_resource_cnt = debugfs_create_file("fw_resource_count",
	S_IRUSR, ha->dfs_dir, vha, &dfs_fw_resource_cnt_ops);
	if (!ha->dfs_fw_resource_cnt) {
	ql_log(ql_log_warn, vha, 0x00fd,
	"Unable to create debugFS fw_resource_count node.\n");
	goto out;
	}

	ha->dfs_tgt_counters = debugfs_create_file("tgt_counters", S_IRUSR,
	ha->dfs_dir, vha, &dfs_tgt_counters_ops);
	if (!ha->dfs_tgt_counters) {
	ql_log(ql_log_warn, vha, 0xd301,
	"Unable to create debugFS tgt_counters node.\n");
	goto out;
	}

	ha->dfs_fce = debugfs_create_file("fce", S_IRUSR, ha->dfs_dir, vha,
	&dfs_fce_ops);
	if (!ha->dfs_fce) {
	ql_log(ql_log_warn, vha, 0x00f9,
	"Unable to create debugfs fce node.\n");
	goto out;
	}

	ha->tgt.dfs_tgt_sess = debugfs_create_file("tgt_sess",
	S_IRUSR, ha->dfs_dir, vha, &dfs_tgt_sess_ops);
	if (!ha->tgt.dfs_tgt_sess) {
	ql_log(ql_log_warn, vha, 0xffff,
	"Unable to create debugFS tgt_sess node.\n");
	goto out;
	}

	out:
	return 0;
	}

	int
	qla2x00_dfs_remove(scsi_qla_host_t *vha)
	{
	struct qla_hw_data *ha = vha->hw;

	if (ha->tgt.dfs_tgt_sess) {
	debugfs_remove(ha->tgt.dfs_tgt_sess);
	ha->tgt.dfs_tgt_sess = NULL;
	}

	if (ha->dfs_fw_resource_cnt) {
	debugfs_remove(ha->dfs_fw_resource_cnt);
	ha->dfs_fw_resource_cnt = NULL;
	}

	if (ha->dfs_tgt_counters) {
	debugfs_remove(ha->dfs_tgt_counters);
	ha->dfs_tgt_counters = NULL;
	}

	if (ha->dfs_fce) {
	debugfs_remove(ha->dfs_fce);
	ha->dfs_fce = NULL;
	}

	if (ha->dfs_dir) {
	debugfs_remove(ha->dfs_dir);
	ha->dfs_dir = NULL;
	atomic_dec(&qla2x00_dfs_root_count);
	}

	if (atomic_read(&qla2x00_dfs_root_count) == 0 &&
	qla2x00_dfs_root) {
	debugfs_remove(qla2x00_dfs_root);
	qla2x00_dfs_root = NULL;
	}

	return 0;
	}