From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from server19320154104.serverpool.info ([193.201.54.104]:51983 "EHLO hauke-m.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1762645Ab0HGNdJ (ORCPT ); Sat, 7 Aug 2010 09:33:09 -0400 From: Hauke Mehrtens To: lrodriguez@atheros.com Cc: linux-wireless@vger.kernel.org, mcgrof@infradead.org, Hauke Mehrtens Subject: [PATCH 4/4] compat: update compat_firmware_class.c Date: Sat, 7 Aug 2010 15:32:21 +0200 Message-Id: <1281187941-7168-5-git-send-email-hauke@hauke-m.de> In-Reply-To: <1281187941-7168-1-git-send-email-hauke@hauke-m.de> References: <1281187941-7168-1-git-send-email-hauke@hauke-m.de> Sender: linux-wireless-owner@vger.kernel.org List-ID: Refresh code based on recent version in linux-next. Signed-off-by: Hauke Mehrtens --- compat/compat_firmware_class.c | 290 ++++++++++++++++++++------------------- 1 files changed, 149 insertions(+), 141 deletions(-) diff --git a/compat/compat_firmware_class.c b/compat/compat_firmware_class.c index 02f38a2..70ab25c 100644 --- a/compat/compat_firmware_class.c +++ b/compat/compat_firmware_class.c @@ -88,27 +88,31 @@ static DEFINE_MUTEX(fw_lock); struct firmware_priv { struct completion completion; - struct bin_attribute attr_data; struct firmware *fw; unsigned long status; struct page **pages; int nr_pages; int page_array_size; struct timer_list timeout; + struct device dev; bool nowait; char fw_id[]; }; -static void -fw_load_abort(struct firmware_priv *fw_priv) +static struct firmware_priv *to_firmware_priv(struct device *dev) +{ + return container_of(dev, struct firmware_priv, dev); +} + +static void fw_load_abort(struct firmware_priv *fw_priv) { set_bit(FW_STATUS_ABORT, &fw_priv->status); wmb(); complete(&fw_priv->completion); } -static ssize_t -firmware_timeout_show(struct class *class, char *buf) +static ssize_t firmware_timeout_show(struct class *class, + char *buf) { return sprintf(buf, "%d\n", loading_timeout); } @@ -125,12 +129,13 @@ firmware_timeout_show(struct class *class, char *buf) * * Note: zero means 'wait forever'. **/ -static ssize_t -firmware_timeout_store(struct class *class, const char *buf, size_t count) +static ssize_t firmware_timeout_store(struct class *class, + const char *buf, size_t count) { loading_timeout = simple_strtol(buf, NULL, 10); if (loading_timeout < 0) loading_timeout = 0; + return count; } @@ -142,14 +147,13 @@ static struct class_attribute firmware_class_attrs[] = { static void fw_dev_release(struct device *dev) { - struct firmware_priv *fw_priv = dev_get_drvdata(dev); + struct firmware_priv *fw_priv = to_firmware_priv(dev); int i; for (i = 0; i < fw_priv->nr_pages; i++) __free_page(fw_priv->pages[i]); kfree(fw_priv->pages); kfree(fw_priv); - kfree(dev); module_put(THIS_MODULE); } @@ -157,7 +161,7 @@ static void fw_dev_release(struct device *dev) #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)) static int firmware_uevent(struct device *dev, struct kobj_uevent_env *env) { - struct firmware_priv *fw_priv = dev_get_drvdata(dev); + struct firmware_priv *fw_priv = to_firmware_priv(dev); if (add_uevent_var(env, "FIRMWARE=%s", fw_priv->fw_id)) return -ENOMEM; @@ -172,7 +176,7 @@ static int firmware_uevent(struct device *dev, struct kobj_uevent_env *env) static int firmware_uevent(struct device *dev, char **envp, int num_envp, char *buf, int size) { - struct firmware_priv *fw_priv = dev_get_drvdata(dev); + struct firmware_priv *fw_priv = to_firmware_priv(dev); int error, len = 0, i = 0; error = add_uevent_var(envp, num_envp, &i, @@ -209,11 +213,27 @@ static struct class firmware_class = { static ssize_t firmware_loading_show(struct device *dev, struct device_attribute *attr, char *buf) { - struct firmware_priv *fw_priv = dev_get_drvdata(dev); + struct firmware_priv *fw_priv = to_firmware_priv(dev); int loading = test_bit(FW_STATUS_LOADING, &fw_priv->status); + return sprintf(buf, "%d\n", loading); } +static void firmware_free_data(const struct firmware *fw) +{ +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) + int i; + vunmap(fw->data); + if (fw->pages) { + for (i = 0; i < PFN_UP(fw->size); i++) + __free_page(fw->pages[i]); + kfree(fw->pages); + } +#else + vunmap(fw->data); +#endif +} + /* Some architectures don't have PAGE_KERNEL_RO */ #ifndef PAGE_KERNEL_RO #define PAGE_KERNEL_RO PAGE_KERNEL @@ -221,7 +241,6 @@ static ssize_t firmware_loading_show(struct device *dev, /** * firmware_loading_store - set value in the 'loading' control file * @dev: device pointer - * @attr: device attribute pointer * @buf: buffer to scan for loading control value * @count: number of bytes in @buf * @@ -235,7 +254,7 @@ static ssize_t firmware_loading_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - struct firmware_priv *fw_priv = dev_get_drvdata(dev); + struct firmware_priv *fw_priv = to_firmware_priv(dev); int loading = simple_strtol(buf, NULL, 10); int i; @@ -246,21 +265,21 @@ static ssize_t firmware_loading_store(struct device *dev, mutex_unlock(&fw_lock); break; } - vfree(fw_priv->fw->data); - fw_priv->fw->data = NULL; + firmware_free_data(fw_priv->fw); + memset(fw_priv->fw, 0, sizeof(struct firmware)); + /* If the pages are not owned by 'struct firmware' */ for (i = 0; i < fw_priv->nr_pages; i++) __free_page(fw_priv->pages[i]); kfree(fw_priv->pages); fw_priv->pages = NULL; fw_priv->page_array_size = 0; fw_priv->nr_pages = 0; - fw_priv->fw->size = 0; set_bit(FW_STATUS_LOADING, &fw_priv->status); mutex_unlock(&fw_lock); break; case 0: if (test_bit(FW_STATUS_LOADING, &fw_priv->status)) { - vfree(fw_priv->fw->data); + vunmap(fw_priv->fw->data); fw_priv->fw->data = vmap(fw_priv->pages, fw_priv->nr_pages, 0, PAGE_KERNEL_RO); @@ -268,7 +287,12 @@ static ssize_t firmware_loading_store(struct device *dev, dev_err(dev, "%s: vmap() failed\n", __func__); goto err; } - /* Pages will be freed by vfree() */ + /* Pages are now owned by 'struct firmware' */ +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) + fw_priv->fw->pages = fw_priv->pages; + fw_priv->pages = NULL; +#endif + fw_priv->page_array_size = 0; fw_priv->nr_pages = 0; complete(&fw_priv->completion); @@ -290,12 +314,12 @@ static ssize_t firmware_loading_store(struct device *dev, static DEVICE_ATTR(loading, 0644, firmware_loading_show, firmware_loading_store); -static ssize_t -firmware_data_read(struct kobject *kobj, struct bin_attribute *bin_attr, - char *buffer, loff_t offset, size_t count) +static ssize_t firmware_data_read(struct kobject *kobj, + struct bin_attribute *bin_attr, + char *buffer, loff_t offset, size_t count) { struct device *dev = to_dev(kobj); - struct firmware_priv *fw_priv = dev_get_drvdata(dev); + struct firmware_priv *fw_priv = to_firmware_priv(dev); struct firmware *fw; ssize_t ret_count; @@ -334,8 +358,7 @@ out: return ret_count; } -static int -fw_realloc_buffer(struct firmware_priv *fw_priv, int min_size) +static int fw_realloc_buffer(struct firmware_priv *fw_priv, int min_size) { int pages_needed = ALIGN(min_size, PAGE_SIZE) >> PAGE_SHIFT; @@ -384,12 +407,12 @@ fw_realloc_buffer(struct firmware_priv *fw_priv, int min_size) * Data written to the 'data' attribute will be later handed to * the driver as a firmware image. **/ -static ssize_t -firmware_data_write(struct kobject *kobj, struct bin_attribute *bin_attr, - char *buffer, loff_t offset, size_t count) +static ssize_t firmware_data_write(struct kobject *kobj, + struct bin_attribute *bin_attr, + char *buffer, loff_t offset, size_t count) { struct device *dev = to_dev(kobj); - struct firmware_priv *fw_priv = dev_get_drvdata(dev); + struct firmware_priv *fw_priv = to_firmware_priv(dev); struct firmware *fw; ssize_t retval; @@ -430,116 +453,103 @@ out: return retval; } -static struct bin_attribute firmware_attr_data_tmpl = { - .attr = {.name = "data", .mode = 0644}, +static struct bin_attribute firmware_attr_data = { + .attr = { .name = "data", .mode = 0644 }, .size = 0, .read = firmware_data_read, .write = firmware_data_write, }; -static void -firmware_class_timeout(u_long data) +static void firmware_class_timeout(u_long data) { struct firmware_priv *fw_priv = (struct firmware_priv *) data; + fw_load_abort(fw_priv); } -static int fw_register_device(struct device **dev_p, const char *fw_name, - struct device *device) +static struct firmware_priv * +fw_create_instance(struct firmware *firmware, const char *fw_name, + struct device *device, bool uevent, bool nowait) { - int retval; - struct firmware_priv *fw_priv = - kzalloc(sizeof(*fw_priv) + strlen(fw_name) + 1 , GFP_KERNEL); - struct device *f_dev = kzalloc(sizeof(*f_dev), GFP_KERNEL); - - *dev_p = NULL; + struct firmware_priv *fw_priv; + struct device *f_dev; + int error; - if (!fw_priv || !f_dev) { + fw_priv = kzalloc(sizeof(*fw_priv) + strlen(fw_name) + 1 , GFP_KERNEL); + if (!fw_priv) { dev_err(device, "%s: kmalloc failed\n", __func__); - retval = -ENOMEM; - goto error_kfree; + error = -ENOMEM; + goto err_out; } + fw_priv->fw = firmware; + fw_priv->nowait = nowait; strcpy(fw_priv->fw_id, fw_name); init_completion(&fw_priv->completion); - fw_priv->attr_data = firmware_attr_data_tmpl; - fw_priv->timeout.function = firmware_class_timeout; - fw_priv->timeout.data = (u_long) fw_priv; - init_timer(&fw_priv->timeout); + setup_timer(&fw_priv->timeout, + firmware_class_timeout, (u_long) fw_priv); + f_dev = &fw_priv->dev; + + device_initialize(f_dev); dev_set_name(f_dev, "%s", dev_name(device)); f_dev->parent = device; f_dev->class = &firmware_class; - dev_set_drvdata(f_dev, fw_priv); - dev_set_uevent_suppress(f_dev, 1); - retval = device_register(f_dev); - if (retval) { - dev_err(device, "%s: device_register failed\n", __func__); - put_device(f_dev); - return retval; - } - *dev_p = f_dev; - return 0; - -error_kfree: - kfree(f_dev); - kfree(fw_priv); - return retval; -} -static int fw_setup_device(struct firmware *fw, struct device **dev_p, - const char *fw_name, struct device *device, - int uevent, bool nowait) -{ - struct device *f_dev; - struct firmware_priv *fw_priv; - int retval; - - *dev_p = NULL; - retval = fw_register_device(&f_dev, fw_name, device); - if (retval) - goto out; + dev_set_uevent_suppress(f_dev, true); /* Need to pin this module until class device is destroyed */ __module_get(THIS_MODULE); - fw_priv = dev_get_drvdata(f_dev); - - fw_priv->nowait = nowait; + error = device_add(f_dev); + if (error) { + dev_err(device, "%s: device_register failed\n", __func__); + goto err_put_dev; + } - fw_priv->fw = fw; - sysfs_bin_attr_init(&fw_priv->attr_data); - retval = sysfs_create_bin_file(&f_dev->kobj, &fw_priv->attr_data); - if (retval) { + error = device_create_bin_file(f_dev, &firmware_attr_data); + if (error) { dev_err(device, "%s: sysfs_create_bin_file failed\n", __func__); - goto error_unreg; + goto err_del_dev; } - retval = device_create_file(f_dev, &dev_attr_loading); - if (retval) { + error = device_create_file(f_dev, &dev_attr_loading); + if (error) { dev_err(device, "%s: device_create_file failed\n", __func__); - goto error_unreg; + goto err_del_bin_attr; } if (uevent) - dev_set_uevent_suppress(f_dev, 0); - *dev_p = f_dev; - goto out; + dev_set_uevent_suppress(f_dev, false); + + return fw_priv; + +err_del_bin_attr: + device_remove_bin_file(f_dev, &firmware_attr_data); +err_del_dev: + device_del(f_dev); +err_put_dev: + put_device(f_dev); +err_out: + return ERR_PTR(error); +} + +static void fw_destroy_instance(struct firmware_priv *fw_priv) +{ + struct device *f_dev = &fw_priv->dev; -error_unreg: + device_remove_file(f_dev, &dev_attr_loading); + device_remove_bin_file(f_dev, &firmware_attr_data); device_unregister(f_dev); -out: - return retval; } -static int -_request_firmware(const struct firmware **firmware_p, const char *name, - struct device *device, int uevent, bool nowait) +static int _request_firmware(const struct firmware **firmware_p, + const char *name, struct device *device, + bool uevent, bool nowait) { - struct device *f_dev; struct firmware_priv *fw_priv; struct firmware *firmware; - int retval; + int retval = 0; if (!firmware_p) return -EINVAL; @@ -560,41 +570,40 @@ _request_firmware(const struct firmware **firmware_p, const char *name, if (uevent) dev_dbg(device, "firmware: requesting %s\n", name); - retval = fw_setup_device(firmware, &f_dev, name, device, - uevent, nowait); - if (retval) - goto error_kfree_fw; - - fw_priv = dev_get_drvdata(f_dev); + fw_priv = fw_create_instance(firmware, name, device, uevent, nowait); + if (IS_ERR(fw_priv)) { + retval = PTR_ERR(fw_priv); + goto out; + } if (uevent) { - if (loading_timeout > 0) { - fw_priv->timeout.expires = jiffies + loading_timeout * HZ; - add_timer(&fw_priv->timeout); - } + if (loading_timeout > 0) + mod_timer(&fw_priv->timeout, + round_jiffies_up(jiffies + + loading_timeout * HZ)); + + kobject_uevent(&fw_priv->dev.kobj, KOBJ_ADD); + } + + wait_for_completion(&fw_priv->completion); - kobject_uevent(&f_dev->kobj, KOBJ_ADD); - wait_for_completion(&fw_priv->completion); - set_bit(FW_STATUS_DONE, &fw_priv->status); - del_timer_sync(&fw_priv->timeout); - } else - wait_for_completion(&fw_priv->completion); + set_bit(FW_STATUS_DONE, &fw_priv->status); + del_timer_sync(&fw_priv->timeout); mutex_lock(&fw_lock); - if (!fw_priv->fw->size || test_bit(FW_STATUS_ABORT, &fw_priv->status)) { + if (!fw_priv->fw->size || test_bit(FW_STATUS_ABORT, &fw_priv->status)) retval = -ENOENT; - release_firmware(fw_priv->fw); - *firmware_p = NULL; - } fw_priv->fw = NULL; mutex_unlock(&fw_lock); - device_unregister(f_dev); - goto out; -error_kfree_fw: - kfree(firmware); - *firmware_p = NULL; + fw_destroy_instance(fw_priv); + out: + if (retval) { + release_firmware(firmware); + firmware_p = NULL; + } + return retval; } @@ -629,8 +638,7 @@ void release_firmware(const struct firmware *fw) { if (fw) { if (!fw_is_builtin_firmware(fw)) - vfree(fw->data); - + firmware_free_data(fw); kfree(fw); } } @@ -646,23 +654,24 @@ struct firmware_work { int uevent; }; -static int -request_firmware_work_func(void *arg) +static int request_firmware_work_func(void *arg) { struct firmware_work *fw_work = arg; const struct firmware *fw; int ret; + if (!arg) { WARN_ON(1); return 0; } - ret = _request_firmware(&fw, fw_work->name, fw_work->device, - fw_work->uevent, true); + ret = _request_firmware(&fw, fw_work->name, fw_work->device, + fw_work->uevent, true); fw_work->cont(fw, fw_work->context); module_put(fw_work->module); kfree(fw_work); + return ret; } @@ -690,34 +699,33 @@ request_firmware_nowait( void (*cont)(const struct firmware *fw, void *context)) { struct task_struct *task; - struct firmware_work *fw_work = kmalloc(sizeof (struct firmware_work), - gfp); + struct firmware_work *fw_work; + fw_work = kzalloc(sizeof (struct firmware_work), gfp); if (!fw_work) return -ENOMEM; + + fw_work->module = module; + fw_work->name = name; + fw_work->device = device; + fw_work->context = context; + fw_work->cont = cont; + fw_work->uevent = uevent; + if (!try_module_get(module)) { kfree(fw_work); return -EFAULT; } - *fw_work = (struct firmware_work) { - .module = module, - .name = name, - .device = device, - .context = context, - .cont = cont, - .uevent = uevent, - }; - task = kthread_run(request_firmware_work_func, fw_work, "firmware/%s", name); - if (IS_ERR(task)) { fw_work->cont(NULL, fw_work->context); module_put(fw_work->module); kfree(fw_work); return PTR_ERR(task); } + return 0; } -- 1.7.0.4