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Commit c4b76893 authored by Luis R. Rodriguez's avatar Luis R. Rodriguez Committed by Greg Kroah-Hartman
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firmware: share fw fallback killing on reboot/suspend 



We kill pending fallback requests on suspend and reboot,
the only difference is that on suspend we only kill custom
fallback requests. Provide a wrapper that lets us customize
the request with a flag.

This also lets us simplify the #ifdef'ery over the calls.

Signed-off-by: default avatarLuis R. Rodriguez <mcgrof@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 6383331d

drivers/base/firmware_class.c

+14 −15
Original line number Diff line number Diff line
@@ -562,32 +562,29 @@ static void fw_load_abort(struct firmware_priv *fw_priv) 


static LIST_HEAD(pending_fw_head);



#ifdef CONFIG_PM_SLEEP

/* kill pending requests without uevent to avoid blocking suspend */

static void kill_requests_without_uevent(void)

static void kill_pending_fw_fallback_reqs(bool only_kill_custom)

{

	struct firmware_buf *buf;

	struct firmware_buf *next;



	mutex_lock(&fw_lock);

	list_for_each_entry_safe(buf, next, &pending_fw_head, pending_list) {

		if (!buf->need_uevent)

		if (!buf->need_uevent || !only_kill_custom)

			 __fw_load_abort(buf);

	}

	mutex_unlock(&fw_lock);

}

#endif



/* reboot notifier for avoid deadlock with usermode_lock */

static int fw_shutdown_notify(struct notifier_block *unused1,

			      unsigned long unused2, void *unused3)

{

	mutex_lock(&fw_lock);

	while (!list_empty(&pending_fw_head))

		__fw_load_abort(list_first_entry(&pending_fw_head,

					       struct firmware_buf,

					       pending_list));

	mutex_unlock(&fw_lock);

	/*

	 * Kill all pending fallback requests to avoid both stalling shutdown,

	 * and avoid a deadlock with the usermode_lock.

	 */

	kill_pending_fw_fallback_reqs(false);



	return NOTIFY_DONE;

}
@@ -1073,9 +1070,7 @@ fw_load_from_user_helper(struct firmware *firmware, const char *name, 
	return -ENOENT;

}



#ifdef CONFIG_PM_SLEEP

static inline void kill_requests_without_uevent(void) { }

#endif

static inline void kill_pending_fw_fallback_reqs(bool only_kill_custom) { }



#endif /* CONFIG_FW_LOADER_USER_HELPER */
@@ -1724,7 +1719,11 @@ static int fw_pm_notify(struct notifier_block *notify_block, 
	case PM_HIBERNATION_PREPARE:

	case PM_SUSPEND_PREPARE:

	case PM_RESTORE_PREPARE:

		kill_requests_without_uevent();

		/*

		 * kill pending fallback requests with a custom fallback

		 * to avoid stalling suspend.

		 */

		kill_pending_fw_fallback_reqs(true);

		device_cache_fw_images();

		break;