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[media] rc-core: improve the lirc protocol reporting 

Commit 275ddb40bc removed the lirc
"protocol" but kept backwards compatibility by always listing
the protocol as present and enabled. This patch further improves
the logic by only listing the protocol if the lirc module is loaded
(or if lirc is builtin).

Signed-off-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
David Härdeman 2015-07-22 17:55:24 -03:00 committed by Mauro Carvalho Chehab
parent f103a9c1a0
commit dd6ff6a05b
1 changed files with 18 additions and 1 deletions
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19
drivers/media/rc/rc-main.c
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@ -828,6 +828,23 @@ struct rc_filter_attribute {
.mask = (_mask), \
}
static bool lirc_is_present(void)
{
#if defined(CONFIG_LIRC_MODULE)
struct module *lirc;
mutex_lock(&module_mutex);
lirc = find_module("lirc_dev");
mutex_unlock(&module_mutex);
return lirc ? true : false;
#elif defined(CONFIG_LIRC)
return true;
#else
return false;
#endif
}
/**
* show_protocols() - shows the current/wakeup IR protocol(s)
* @device: the device descriptor
@ -884,7 +901,7 @@ static ssize_t show_protocols(struct device *device,
allowed &= ~proto_names[i].type;
}
if (dev->driver_type == RC_DRIVER_IR_RAW)
if (dev->driver_type == RC_DRIVER_IR_RAW && lirc_is_present())
tmp += sprintf(tmp, "[lirc] ");
if (tmp != buf)