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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: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Dmitry Torokhov 2015-03-30 16:20:07 -07:00 committed by Greg Kroah-Hartman
parent d173a137c5
commit 5c36eb2a9e
1 changed files with 13 additions and 0 deletions
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13
drivers/base/platform.c
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@ -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.