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powerpc/powernv: move to use bus_get_dev_root()

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Direct access to the struct bus_type dev_root pointer is going away soon
so replace that with a call to bus_get_dev_root() instead, which is what
it is there for.

Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Wolfram Sang <wsa+renesas@sang-engineering.com>
Cc: Joel Stanley <joel@jms.id.au>
Cc: Liang He <windhl@126.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Julia Lawall <Julia.Lawall@inria.fr>
Cc: linuxppc-dev@lists.ozlabs.org
Link: https://lore.kernel.org/r/20230313182918.1312597-13-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2023-03-13 19:28:55 +01:00
parent 1b40189691
commit 3bf88c4222
2 changed files with 15 additions and 4 deletions
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9
arch/powerpc/platforms/powernv/idle.c
View File

@ -1464,14 +1464,19 @@ static int __init pnv_init_idle_states(void)
power7_fastsleep_workaround_entry = false;
power7_fastsleep_workaround_exit = false;
} else {
struct device *dev_root;
/*
* OPAL_PM_SLEEP_ENABLED_ER1 is set. It indicates that
* workaround is needed to use fastsleep. Provide sysfs
* control to choose how this workaround has to be
* applied.
*/
device_create_file(cpu_subsys.dev_root,
&dev_attr_fastsleep_workaround_applyonce);
dev_root = bus_get_dev_root(&cpu_subsys);
if (dev_root) {
device_create_file(dev_root,
&dev_attr_fastsleep_workaround_applyonce);
put_device(dev_root);
}
}
update_subcore_sibling_mask();

10
arch/powerpc/platforms/powernv/subcore.c
View File

@ -415,7 +415,9 @@ static DEVICE_ATTR(subcores_per_core, 0644,
static int subcore_init(void)
{
struct device *dev_root;
unsigned pvr_ver;
int rc = 0;
pvr_ver = PVR_VER(mfspr(SPRN_PVR));
@ -435,7 +437,11 @@ static int subcore_init(void)
set_subcores_per_core(1);
return device_create_file(cpu_subsys.dev_root,
&dev_attr_subcores_per_core);
dev_root = bus_get_dev_root(&cpu_subsys);
if (dev_root) {
rc = device_create_file(dev_root, &dev_attr_subcores_per_core);
put_device(dev_root);
}
return rc;
}
machine_device_initcall(powernv, subcore_init);