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powerpc/rtasd: use correct OF API for event scan rate 

rtas_token() should be used only for properties that are RTAS function
tokens. "rtas-event-scan-rate" does not contain a function token, but it
has the same size/format as token properties so reading it with
rtas_token() happens to work.

Convert to of_property_read_u32().

Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com>
Reviewed-by: Andrew Donnellan <ajd@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221118150751.469393-3-nathanl@linux.ibm.com
This commit is contained in:
Nathan Lynch 2022-11-18 09:07:40 -06:00 committed by Michael Ellerman
parent 336e2554ec
commit b10af504a2
1 changed files with 5 additions and 2 deletions
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7
arch/powerpc/kernel/rtasd.c
View File

@ -9,6 +9,7 @@
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/poll.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
@ -499,6 +500,8 @@ EXPORT_SYMBOL_GPL(rtas_cancel_event_scan);
static int __init rtas_event_scan_init(void)
{
int err;
if (!machine_is(pseries) && !machine_is(chrp))
return 0;
@ -509,8 +512,8 @@ static int __init rtas_event_scan_init(void)
return -ENODEV;
}
rtas_event_scan_rate = rtas_token("rtas-event-scan-rate");
if (rtas_event_scan_rate == RTAS_UNKNOWN_SERVICE) {
err = of_property_read_u32(rtas.dev, "rtas-event-scan-rate", &rtas_event_scan_rate);
if (err) {
printk(KERN_ERR "rtasd: no rtas-event-scan-rate on system\n");
return -ENODEV;
}