firmware: Reduce ifdef CONFIG_FW_LOADER_USER_HELPER

By shuffling the code, reduce a few ifdefs in firmware_class.c.
Also, firmware_buf fmt field is changed to is_pages_buf boolean for
simplification.

Acked-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 151 insertions, 162 deletions

diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 84b1c8d0ea56..51e62ca1d574 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -88,13 +88,6 @@ enum {
         FW_STATUS_ABORT,
 };
 
-#ifdef CONFIG_FW_LOADER_USER_HELPER
-enum fw_buf_fmt {
-        VMALLOC_BUF,    /* used in direct loading */
-        PAGE_BUF,       /* used in loading via userspace */
-};
-#endif /* CONFIG_FW_LOADER_USER_HELPER */
-
 static int loading_timeout = 60;        /* In seconds */
 
 static inline long firmware_loading_timeout(void)
@@ -133,7 +126,7 @@ struct firmware_buf {
         void *data;
         size_t size;
 #ifdef CONFIG_FW_LOADER_USER_HELPER
-        enum fw_buf_fmt fmt;
+        bool is_paged_buf;
         struct page **pages;
         int nr_pages;
         int page_array_size;
@@ -146,16 +139,6 @@ struct fw_cache_entry {
         char name[];
 };
 
-#ifdef CONFIG_FW_LOADER_USER_HELPER
-struct firmware_priv {
-        struct delayed_work timeout_work;
-        bool nowait;
-        struct device dev;
-        struct firmware_buf *buf;
-        struct firmware *fw;
-};
-#endif
-
 struct fw_name_devm {
         unsigned long magic;
         char name[];
@@ -188,9 +171,6 @@ static struct firmware_buf *__allocate_fw_buf(const char *fw_name,
         strcpy(buf->fw_id, fw_name);
         buf->fwc = fwc;
         init_completion(&buf->completion);
-#ifdef CONFIG_FW_LOADER_USER_HELPER
-        buf->fmt = VMALLOC_BUF;
-#endif
 
         pr_debug("%s: fw-%s buf=%p\n", __func__, fw_name, buf);
 
@@ -256,9 +236,8 @@ static void __fw_free_buf(struct kref *ref)
         list_del(&buf->list);
         spin_unlock(&fwc->lock);
 
-
 #ifdef CONFIG_FW_LOADER_USER_HELPER
-        if (buf->fmt == PAGE_BUF) {
+        if (buf->is_paged_buf) {
                 int i;
                 vunmap(buf->data);
                 for (i = 0; i < buf->nr_pages; i++)
@@ -378,7 +357,89 @@ static void firmware_free_data(const struct firmware *fw)
         fw_free_buf(fw->priv);
 }
 
+/* store the pages buffer info firmware from buf */
+static void fw_set_page_data(struct firmware_buf *buf, struct firmware *fw)
+{
+        fw->priv = buf;
+#ifdef CONFIG_FW_LOADER_USER_HELPER
+        fw->pages = buf->pages;
+#endif
+        fw->size = buf->size;
+        fw->data = buf->data;
+
+        pr_debug("%s: fw-%s buf=%p data=%p size=%u\n",
+                 __func__, buf->fw_id, buf, buf->data,
+                 (unsigned int)buf->size);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static void fw_name_devm_release(struct device *dev, void *res)
+{
+        struct fw_name_devm *fwn = res;
+
+        if (fwn->magic == (unsigned long)&fw_cache)
+                pr_debug("%s: fw_name-%s devm-%p released\n",
+                                __func__, fwn->name, res);
+}
+
+static int fw_devm_match(struct device *dev, void *res,
+                void *match_data)
+{
+        struct fw_name_devm *fwn = res;
+
+        return (fwn->magic == (unsigned long)&fw_cache) &&
+                !strcmp(fwn->name, match_data);
+}
+
+static struct fw_name_devm *fw_find_devm_name(struct device *dev,
+                const char *name)
+{
+        struct fw_name_devm *fwn;
+
+        fwn = devres_find(dev, fw_name_devm_release,
+                          fw_devm_match, (void *)name);
+        return fwn;
+}
+
+/* add firmware name into devres list */
+static int fw_add_devm_name(struct device *dev, const char *name)
+{
+        struct fw_name_devm *fwn;
+
+        fwn = fw_find_devm_name(dev, name);
+        if (fwn)
+                return 1;
+
+        fwn = devres_alloc(fw_name_devm_release, sizeof(struct fw_name_devm) +
+                           strlen(name) + 1, GFP_KERNEL);
+        if (!fwn)
+                return -ENOMEM;
+
+        fwn->magic = (unsigned long)&fw_cache;
+        strcpy(fwn->name, name);
+        devres_add(dev, fwn);
+
+        return 0;
+}
+#else
+static int fw_add_devm_name(struct device *dev, const char *name)
+{
+        return 0;
+}
+#endif
+
+
+/*
+ * user-mode helper code
+ */
 #ifdef CONFIG_FW_LOADER_USER_HELPER
+struct firmware_priv {
+        struct delayed_work timeout_work;
+        bool nowait;
+        struct device dev;
+        struct firmware_buf *buf;
+        struct firmware *fw;
+};
 
 static struct firmware_priv *to_firmware_priv(struct device *dev)
 {
@@ -477,7 +538,7 @@ static ssize_t firmware_loading_show(struct device *dev,
 /* one pages buffer should be mapped/unmapped only once */
 static int fw_map_pages_buf(struct firmware_buf *buf)
 {
-        if (buf->fmt != PAGE_BUF)
+        if (!buf->is_paged_buf)
                 return 0;
 
         if (buf->data)
@@ -749,78 +810,89 @@ fw_create_instance(struct firmware *firmware, const char *fw_name,
 exit:
         return fw_priv;
 }
-#endif /* CONFIG_FW_LOADER_USER_HELPER */
 
-/* store the pages buffer info firmware from buf */
-static void fw_set_page_data(struct firmware_buf *buf, struct firmware *fw)
+/* load a firmware via user helper */
+static int _request_firmware_load(struct firmware_priv *fw_priv, bool uevent,
+                                  long timeout)
 {
-        fw->priv = buf;
-#ifdef CONFIG_FW_LOADER_USER_HELPER
-        fw->pages = buf->pages;
-#endif
-        fw->size = buf->size;
-        fw->data = buf->data;
+        int retval = 0;
+        struct device *f_dev = &fw_priv->dev;
+        struct firmware_buf *buf = fw_priv->buf;
 
-        pr_debug("%s: fw-%s buf=%p data=%p size=%u\n",
-                 __func__, buf->fw_id, buf, buf->data,
-                 (unsigned int)buf->size);
-}
+        /* fall back on userspace loading */
+        buf->is_paged_buf = true;
 
-#ifdef CONFIG_PM_SLEEP
-static void fw_name_devm_release(struct device *dev, void *res)
-{
-        struct fw_name_devm *fwn = res;
+        dev_set_uevent_suppress(f_dev, true);
 
-        if (fwn->magic == (unsigned long)&fw_cache)
-                pr_debug("%s: fw_name-%s devm-%p released\n",
-                                __func__, fwn->name, res);
-}
+        /* Need to pin this module until class device is destroyed */
+        __module_get(THIS_MODULE);
 
-static int fw_devm_match(struct device *dev, void *res,
-                void *match_data)
-{
-        struct fw_name_devm *fwn = res;
+        retval = device_add(f_dev);
+        if (retval) {
+                dev_err(f_dev, "%s: device_register failed\n", __func__);
+                goto err_put_dev;
+        }
 
-        return (fwn->magic == (unsigned long)&fw_cache) &&
-                !strcmp(fwn->name, match_data);
-}
+        retval = device_create_bin_file(f_dev, &firmware_attr_data);
+        if (retval) {
+                dev_err(f_dev, "%s: sysfs_create_bin_file failed\n", __func__);
+                goto err_del_dev;
+        }
 
-static struct fw_name_devm *fw_find_devm_name(struct device *dev,
-                const char *name)
-{
-        struct fw_name_devm *fwn;
+        retval = device_create_file(f_dev, &dev_attr_loading);
+        if (retval) {
+                dev_err(f_dev, "%s: device_create_file failed\n", __func__);
+                goto err_del_bin_attr;
+        }
 
-        fwn = devres_find(dev, fw_name_devm_release,
-                          fw_devm_match, (void *)name);
-        return fwn;
-}
+        if (uevent) {
+                dev_set_uevent_suppress(f_dev, false);
+                dev_dbg(f_dev, "firmware: requesting %s\n", buf->fw_id);
+                if (timeout != MAX_SCHEDULE_TIMEOUT)
+                        schedule_delayed_work(&fw_priv->timeout_work, timeout);
 
-/* add firmware name into devres list */
-static int fw_add_devm_name(struct device *dev, const char *name)
-{
-        struct fw_name_devm *fwn;
+                kobject_uevent(&fw_priv->dev.kobj, KOBJ_ADD);
+        }
 
-        fwn = fw_find_devm_name(dev, name);
-        if (fwn)
-                return 1;
+        wait_for_completion(&buf->completion);
 
-        fwn = devres_alloc(fw_name_devm_release, sizeof(struct fw_name_devm) +
-                           strlen(name) + 1, GFP_KERNEL);
-        if (!fwn)
-                return -ENOMEM;
+        cancel_delayed_work_sync(&fw_priv->timeout_work);
 
-        fwn->magic = (unsigned long)&fw_cache;
-        strcpy(fwn->name, name);
-        devres_add(dev, fwn);
+        fw_priv->buf = NULL;
 
-        return 0;
+        device_remove_file(f_dev, &dev_attr_loading);
+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);
+        return retval;
 }
-#else
-static int fw_add_devm_name(struct device *dev, const char *name)
+
+static int fw_load_from_user_helper(struct firmware *firmware,
+                                    const char *name, struct device *device,
+                                    bool uevent, bool nowait, long timeout)
 {
-        return 0;
+        struct firmware_priv *fw_priv;
+
+        fw_priv = fw_create_instance(firmware, name, device, uevent, nowait);
+        if (IS_ERR(fw_priv))
+                return PTR_ERR(fw_priv);
+
+        fw_priv->buf = firmware->priv;
+        return _request_firmware_load(fw_priv, uevent, timeout);
 }
-#endif
+#else /* CONFIG_FW_LOADER_USER_HELPER */
+static inline int
+fw_load_from_user_helper(struct firmware *firmware, const char *name,
+                         struct device *device, bool uevent, bool nowait,
+                         long timeout)
+{
+        return -ENOENT;
+}
+#endif /* CONFIG_FW_LOADER_USER_HELPER */
+
 
 /* wait until the shared firmware_buf becomes ready (or error) */
 static int sync_cached_firmware_buf(struct firmware_buf *buf)
@@ -921,89 +993,6 @@ static int assign_firmware_buf(struct firmware *fw, struct device *device)
         return 0;
 }
 
-#ifdef CONFIG_FW_LOADER_USER_HELPER
-/* load a firmware via user helper */
-static int _request_firmware_load(struct firmware_priv *fw_priv, bool uevent,
-                                  long timeout)
-{
-        int retval = 0;
-        struct device *f_dev = &fw_priv->dev;
-        struct firmware_buf *buf = fw_priv->buf;
-
-        /* fall back on userspace loading */
-        buf->fmt = PAGE_BUF;
-
-        dev_set_uevent_suppress(f_dev, true);
-
-        /* Need to pin this module until class device is destroyed */
-        __module_get(THIS_MODULE);
-
-        retval = device_add(f_dev);
-        if (retval) {
-                dev_err(f_dev, "%s: device_register failed\n", __func__);
-                goto err_put_dev;
-        }
-
-        retval = device_create_bin_file(f_dev, &firmware_attr_data);
-        if (retval) {
-                dev_err(f_dev, "%s: sysfs_create_bin_file failed\n", __func__);
-                goto err_del_dev;
-        }
-
-        retval = device_create_file(f_dev, &dev_attr_loading);
-        if (retval) {
-                dev_err(f_dev, "%s: device_create_file failed\n", __func__);
-                goto err_del_bin_attr;
-        }
-
-        if (uevent) {
-                dev_set_uevent_suppress(f_dev, false);
-                dev_dbg(f_dev, "firmware: requesting %s\n", buf->fw_id);
-                if (timeout != MAX_SCHEDULE_TIMEOUT)
-                        schedule_delayed_work(&fw_priv->timeout_work, timeout);
-
-                kobject_uevent(&fw_priv->dev.kobj, KOBJ_ADD);
-        }
-
-        wait_for_completion(&buf->completion);
-
-        cancel_delayed_work_sync(&fw_priv->timeout_work);
-
-        fw_priv->buf = NULL;
-
-        device_remove_file(f_dev, &dev_attr_loading);
-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);
-        return retval;
-}
-
-static int fw_load_from_user_helper(struct firmware *firmware,
-                                    const char *name, struct device *device,
-                                    bool uevent, bool nowait, long timeout)
-{
-        struct firmware_priv *fw_priv;
-
-        fw_priv = fw_create_instance(firmware, name, device, uevent, nowait);
-        if (IS_ERR(fw_priv))
-                return PTR_ERR(fw_priv);
-
-        fw_priv->buf = firmware->priv;
-        return _request_firmware_load(fw_priv, uevent, timeout);
-}
-#else /* CONFIG_FW_LOADER_USER_HELPER */
-static inline int
-fw_load_from_user_helper(struct firmware *firmware, const char *name,
-                         struct device *device, bool uevent, bool nowait,
-                         long timeout)
-{
-        return -ENOENT;
-}
-#endif /* CONFIG_FW_LOADER_USER_HELPER */
-
 /* called from request_firmware() and request_firmware_work_func() */
 static int
 _request_firmware(const struct firmware **firmware_p, const char *name,