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driver core: soc: remove layering violation for the soc_bus 

The soc_bus code pokes around in the internal bus structures assuming
that it "knows" if a field is not set that it has not been registered
yet.  That isn't a safe assumption, so just remove the layering
violation entirely and keep track if the bus has been registered or not
ourselves.

Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/20230130171059.1784057-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2023-01-30 18:10:59 +01:00
parent b7810ea80f
commit 90be1f15c3
1 changed files with 3 additions and 1 deletions
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4
drivers/base/soc.c
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@ -30,6 +30,7 @@ struct soc_device {
static struct bus_type soc_bus_type = {
.name = "soc",
};
static bool soc_bus_registered;
static DEVICE_ATTR(machine, 0444, soc_info_show, NULL);
static DEVICE_ATTR(family, 0444, soc_info_show, NULL);
@ -117,7 +118,7 @@ struct soc_device *soc_device_register(struct soc_device_attribute *soc_dev_attr
const struct attribute_group **soc_attr_groups;
int ret;
if (!soc_bus_type.p) {
if (!soc_bus_registered) {
if (early_soc_dev_attr)
return ERR_PTR(-EBUSY);
early_soc_dev_attr = soc_dev_attr;
@ -183,6 +184,7 @@ static int __init soc_bus_register(void)
ret = bus_register(&soc_bus_type);
if (ret)
return ret;
soc_bus_registered = true;
if (early_soc_dev_attr)
return PTR_ERR(soc_device_register(early_soc_dev_attr));