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Commit 5c36eb2a authored by Dmitry Torokhov's avatar Dmitry Torokhov Committed by Greg Kroah-Hartman
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driver-core: platform_driver_probe() must probe synchronously 



Because platform_driver_probe() checks, after trying to register driver,
if there are any devices that driver successfully bound to, driver's
probe routine must be run synchronously.

Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent d173a137

drivers/base/platform.c

+13 −0
Original line number Diff line number Diff line
@@ -613,6 +613,19 @@ int __init_or_module __platform_driver_probe(struct platform_driver *drv, 
{

	int retval, code;



	if (drv->driver.probe_type == PROBE_PREFER_ASYNCHRONOUS) {

		pr_err("%s: drivers registered with %s can not be probed asynchronously\n",

			 drv->driver.name, __func__);

		return -EINVAL;

	}



	/*

	 * We have to run our probes synchronously because we check if

	 * we find any devices to bind to and exit with error if there

	 * are any.

	 */

	drv->driver.probe_type = PROBE_FORCE_SYNCHRONOUS;



	/*

	 * Prevent driver from requesting probe deferral to avoid further

	 * futile probe attempts.