Messages in this thread Patch in this message | | | From | Florian Schmaus <> | Subject | [PATCH] driver-core: Log the BUG() causing driver | Date | Wed, 7 Mar 2018 10:49:02 +0100 |
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I triggerd the BUG_ON(), which was added in f48f3febb2cbfd0f2ecee7690835ba745c1034a4, when booting a domU Xen domain. Since there was no contextual information logged, I needed to attach kgdb to determine the culprit (the wmi-bmof driver in my case).
Signed-off-by: Florian Schmaus <flo@geekplace.eu> --- drivers/base/driver.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/base/driver.c b/drivers/base/driver.c index ba912558a510..55f8db41df2b 100644 --- a/drivers/base/driver.c +++ b/drivers/base/driver.c @@ -148,7 +148,11 @@ int driver_register(struct device_driver *drv) int ret; struct device_driver *other; - BUG_ON(!drv->bus->p); + if (!drv->bus->p) { + printk(KERN_ERR "Driver '%s' was unable to register bus_type\n", + drv->name); + BUG(); + } if ((drv->bus->probe && drv->probe) || (drv->bus->remove && drv->remove) || -- 2.13.6
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