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authorDmitry Torokhov <dmitry.torokhov@gmail.com>2015-03-30 16:20:07 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-05-20 00:25:25 -0700
commit5c36eb2a9ecc0bc5228451b1eeb83e70b6bb7473 (patch)
tree5d5f051418a625460526c6c4128944697bbd247a /drivers/base/platform.c
parentd173a137c5bd95ee29d02705e5fa8890ef149718 (diff)
downloadlinux-5c36eb2a9ecc0bc5228451b1eeb83e70b6bb7473.tar.bz2
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>
Diffstat (limited to 'drivers/base/platform.c')
-rw-r--r--drivers/base/platform.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index ebf034b97278..063f0ab15259 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -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.