| Message ID | 20241028020131.8031-11-mario.limonciello@amd.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Add support for binding ACPI platform profile to multiple drivers | expand |
On Sun, 27 Oct 2024, Mario Limonciello wrote: > If multiple platform profile handlers have been registered, don't allow > switching to profiles unique to only one handler. > > Tested-by: Matthew Schwartz <matthew.schwartz@linux.dev> > Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> > --- > drivers/acpi/platform_profile.c | 35 ++++++++++++++++++++++----------- > 1 file changed, 24 insertions(+), 11 deletions(-) > > diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c > index 5fee467614eac..a83842f05022b 100644 > --- a/drivers/acpi/platform_profile.c > +++ b/drivers/acpi/platform_profile.c > @@ -33,30 +33,43 @@ static bool platform_profile_is_registered(void) > return count > 0; > } > > +/* expected to be called under mutex */ > +static unsigned long platform_profile_get_choices(void) > +{ > + struct platform_profile_handler *handler; > + unsigned long seen = 0; > + int i; > + > + list_for_each_entry(handler, &platform_profile_handler_list, list) { > + for_each_set_bit(i, handler->choices, PLATFORM_PROFILE_LAST) { > + if (seen & BIT(i)) > + continue; > + seen |= BIT(i); The condition+continue part seems unnecessary if all this function does is accumulate bits into seen.
diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c index 5fee467614eac..a83842f05022b 100644 --- a/drivers/acpi/platform_profile.c +++ b/drivers/acpi/platform_profile.c @@ -33,30 +33,43 @@ static bool platform_profile_is_registered(void) return count > 0; } +/* expected to be called under mutex */ +static unsigned long platform_profile_get_choices(void) +{ + struct platform_profile_handler *handler; + unsigned long seen = 0; + int i; + + list_for_each_entry(handler, &platform_profile_handler_list, list) { + for_each_set_bit(i, handler->choices, PLATFORM_PROFILE_LAST) { + if (seen & BIT(i)) + continue; + seen |= BIT(i); + } + } + + return seen; +} + static ssize_t platform_profile_choices_show(struct device *dev, struct device_attribute *attr, char *buf) { + unsigned long choices; int len = 0; - int err, i; - - err = mutex_lock_interruptible(&profile_lock); - if (err) - return err; + int i; - if (!cur_profile) { - mutex_unlock(&profile_lock); - return -ENODEV; - } + scoped_cond_guard(mutex_intr, return -ERESTARTSYS, &profile_lock) + choices = platform_profile_get_choices(); - for_each_set_bit(i, cur_profile->choices, PLATFORM_PROFILE_LAST) { + for_each_set_bit(i, &choices, PLATFORM_PROFILE_LAST) { if (len == 0) len += sysfs_emit_at(buf, len, "%s", profile_names[i]); else len += sysfs_emit_at(buf, len, " %s", profile_names[i]); } + len += sysfs_emit_at(buf, len, "\n"); - mutex_unlock(&profile_lock); return len; }