2b18ab36cf
The default llseek operation is changing from default_llseek to no_llseek, so all code relying on the current behaviour needs to make that explicit. The wireless driver infrastructure and some of the drivers make use of generated debugfs files, so they cannot be converted by our script that automatically determines the right operation. All these files use debugfs and they typically rely on simple_read_from_buffer, so the best llseek operation here is generic_file_llseek. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: "John W. Linville" <linville@tuxdriver.com> Cc: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org
137 lines
3.5 KiB
C
137 lines
3.5 KiB
C
/*
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* iwmc3200top - Intel Wireless MultiCom 3200 Top Driver
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* drivers/misc/iwmc3200top/debufs.c
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*
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* Copyright (C) 2009 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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*
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* Author Name: Maxim Grabarnik <maxim.grabarnink@intel.com>
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* -
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*
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/ctype.h>
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#include <linux/mmc/sdio_func.h>
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#include <linux/mmc/sdio.h>
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#include <linux/debugfs.h>
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#include "iwmc3200top.h"
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#include "fw-msg.h"
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#include "log.h"
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#include "debugfs.h"
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/* Constants definition */
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#define HEXADECIMAL_RADIX 16
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/* Functions definition */
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#define DEBUGFS_ADD(name, parent) do { \
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dbgfs->dbgfs_##parent##_files.file_##name = \
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debugfs_create_file(#name, 0644, dbgfs->dir_##parent, priv, \
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&iwmct_dbgfs_##name##_ops); \
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} while (0)
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#define DEBUGFS_RM(name) do { \
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debugfs_remove(name); \
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name = NULL; \
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} while (0)
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#define DEBUGFS_READ_FUNC(name) \
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ssize_t iwmct_dbgfs_##name##_read(struct file *file, \
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char __user *user_buf, \
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size_t count, loff_t *ppos);
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#define DEBUGFS_WRITE_FUNC(name) \
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ssize_t iwmct_dbgfs_##name##_write(struct file *file, \
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const char __user *user_buf, \
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size_t count, loff_t *ppos);
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#define DEBUGFS_READ_FILE_OPS(name) \
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DEBUGFS_READ_FUNC(name) \
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static const struct file_operations iwmct_dbgfs_##name##_ops = { \
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.read = iwmct_dbgfs_##name##_read, \
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.open = iwmct_dbgfs_open_file_generic, \
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.llseek = generic_file_llseek, \
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};
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#define DEBUGFS_WRITE_FILE_OPS(name) \
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DEBUGFS_WRITE_FUNC(name) \
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static const struct file_operations iwmct_dbgfs_##name##_ops = { \
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.write = iwmct_dbgfs_##name##_write, \
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.open = iwmct_dbgfs_open_file_generic, \
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.llseek = generic_file_llseek, \
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};
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#define DEBUGFS_READ_WRITE_FILE_OPS(name) \
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DEBUGFS_READ_FUNC(name) \
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DEBUGFS_WRITE_FUNC(name) \
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static const struct file_operations iwmct_dbgfs_##name##_ops = {\
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.write = iwmct_dbgfs_##name##_write, \
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.read = iwmct_dbgfs_##name##_read, \
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.open = iwmct_dbgfs_open_file_generic, \
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.llseek = generic_file_llseek, \
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};
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/* Debugfs file ops definitions */
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/*
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* Create the debugfs files and directories
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*
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*/
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void iwmct_dbgfs_register(struct iwmct_priv *priv, const char *name)
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{
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struct iwmct_debugfs *dbgfs;
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dbgfs = kzalloc(sizeof(struct iwmct_debugfs), GFP_KERNEL);
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if (!dbgfs) {
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LOG_ERROR(priv, DEBUGFS, "failed to allocate %zd bytes\n",
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sizeof(struct iwmct_debugfs));
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return;
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}
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priv->dbgfs = dbgfs;
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dbgfs->name = name;
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dbgfs->dir_drv = debugfs_create_dir(name, NULL);
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if (!dbgfs->dir_drv) {
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LOG_ERROR(priv, DEBUGFS, "failed to create debugfs dir\n");
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return;
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}
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return;
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}
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/**
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* Remove the debugfs files and directories
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*
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*/
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void iwmct_dbgfs_unregister(struct iwmct_debugfs *dbgfs)
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{
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if (!dbgfs)
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return;
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DEBUGFS_RM(dbgfs->dir_drv);
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kfree(dbgfs);
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dbgfs = NULL;
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}
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