diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/base/firmware_class.c | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c index a5fb884a136d..4b57cf5bc81d 100644 --- a/drivers/base/firmware_class.c +++ b/drivers/base/firmware_class.c @@ -258,38 +258,6 @@ static int fw_cache_piggyback_on_request(const char *name); * guarding for corner cases a global lock should be OK */ static DEFINE_MUTEX(fw_lock); -static bool __enable_firmware = false; - -static void enable_firmware(void) -{ - mutex_lock(&fw_lock); - __enable_firmware = true; - mutex_unlock(&fw_lock); -} - -static void disable_firmware(void) -{ - mutex_lock(&fw_lock); - __enable_firmware = false; - mutex_unlock(&fw_lock); -} - -/* - * When disabled only the built-in firmware and the firmware cache will be - * used to look for firmware. - */ -static bool firmware_enabled(void) -{ - bool enabled = false; - - mutex_lock(&fw_lock); - if (__enable_firmware) - enabled = true; - mutex_unlock(&fw_lock); - - return enabled; -} - static struct firmware_cache fw_cache; static struct firmware_buf *__allocate_fw_buf(const char *fw_name, @@ -1246,12 +1214,6 @@ _request_firmware(const struct firmware **firmware_p, const char *name, if (ret <= 0) /* error or already assigned */ goto out; - if (!firmware_enabled()) { - WARN(1, "firmware request while host is not available\n"); - ret = -EHOSTDOWN; - goto out; - } - ret = fw_get_filesystem_firmware(device, fw->priv); if (ret) { if (!(opt_flags & FW_OPT_NO_WARN)) @@ -1762,62 +1724,6 @@ static void device_uncache_fw_images_delay(unsigned long delay) msecs_to_jiffies(delay)); } -/** - * fw_pm_notify - notifier for suspend/resume - * @notify_block: unused - * @mode: mode we are switching to - * @unused: unused - * - * Used to modify the firmware_class state as we move in between states. - * The firmware_class implements a firmware cache to enable device driver - * to fetch firmware upon resume before the root filesystem is ready. We - * disable API calls which do not use the built-in firmware or the firmware - * cache when we know these calls will not work. - * - * The inner logic behind all this is a bit complex so it is worth summarizing - * the kernel's own suspend/resume process with context and focus on how this - * can impact the firmware API. - * - * First a review on how we go to suspend:: - * - * pm_suspend() --> enter_state() --> - * sys_sync() - * suspend_prepare() --> - * __pm_notifier_call_chain(PM_SUSPEND_PREPARE, ...); - * suspend_freeze_processes() --> - * freeze_processes() --> - * __usermodehelper_set_disable_depth(UMH_DISABLED); - * freeze all tasks ... - * freeze_kernel_threads() - * suspend_devices_and_enter() --> - * dpm_suspend_start() --> - * dpm_prepare() - * dpm_suspend() - * suspend_enter() --> - * platform_suspend_prepare() - * dpm_suspend_late() - * freeze_enter() - * syscore_suspend() - * - * When we resume we bail out of a loop from suspend_devices_and_enter() and - * unwind back out to the caller enter_state() where we were before as follows:: - * - * enter_state() --> - * suspend_devices_and_enter() --> (bail from loop) - * dpm_resume_end() --> - * dpm_resume() - * dpm_complete() - * suspend_finish() --> - * suspend_thaw_processes() --> - * thaw_processes() --> - * __usermodehelper_set_disable_depth(UMH_FREEZING); - * thaw_workqueues(); - * thaw all processes ... - * usermodehelper_enable(); - * pm_notifier_call_chain(PM_POST_SUSPEND); - * - * fw_pm_notify() works through pm_notifier_call_chain(). - */ static int fw_pm_notify(struct notifier_block *notify_block, unsigned long mode, void *unused) { @@ -1831,7 +1737,6 @@ static int fw_pm_notify(struct notifier_block *notify_block, */ kill_pending_fw_fallback_reqs(true); device_cache_fw_images(); - disable_firmware(); break; case PM_POST_SUSPEND: @@ -1844,7 +1749,6 @@ static int fw_pm_notify(struct notifier_block *notify_block, mutex_lock(&fw_lock); fw_cache.state = FW_LOADER_NO_CACHE; mutex_unlock(&fw_lock); - enable_firmware(); device_uncache_fw_images_delay(10 * MSEC_PER_SEC); break; @@ -1893,7 +1797,6 @@ static void __init fw_cache_init(void) static int fw_shutdown_notify(struct notifier_block *unused1, unsigned long unused2, void *unused3) { - disable_firmware(); /* * Kill all pending fallback requests to avoid both stalling shutdown, * and avoid a deadlock with the usermode_lock. @@ -1909,7 +1812,6 @@ static struct notifier_block fw_shutdown_nb = { static int __init firmware_class_init(void) { - enable_firmware(); fw_cache_init(); register_reboot_notifier(&fw_shutdown_nb); #ifdef CONFIG_FW_LOADER_USER_HELPER @@ -1921,7 +1823,6 @@ static int __init firmware_class_init(void) static void __exit firmware_class_exit(void) { - disable_firmware(); #ifdef CONFIG_PM_SLEEP unregister_syscore_ops(&fw_syscore_ops); unregister_pm_notifier(&fw_cache.pm_notify); |