From 4ca5f468cc2a0be1cba585f335dcbe56b40944f2 Mon Sep 17 00:00:00 2001 From: Jonathan Cameron Date: Mon, 31 Oct 2011 17:10:09 -0700 Subject: [PATCH] hwmon: convert idr to ida and use ida_simple interface hwmon was using an idr with a NULL pointer, so convert to an ida which then allows use of Rusty's ida_simple_get. Signed-off-by: Jonathan Cameron Cc: Rusty Russell Cc: Tejun Heo Acked-by: Guenter Roeck Cc: James Bottomley Cc: David Airlie Cc: Thomas Hellstrom Cc: Evgeniy Polyakov Cc: Darrick J. Wong Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/hwmon/hwmon.c | 32 ++++++++------------------------ 1 file changed, 8 insertions(+), 24 deletions(-) diff --git a/drivers/hwmon/hwmon.c b/drivers/hwmon/hwmon.c index a61e7815a2a9..6460487e41b5 100644 --- a/drivers/hwmon/hwmon.c +++ b/drivers/hwmon/hwmon.c @@ -27,8 +27,7 @@ static struct class *hwmon_class; -static DEFINE_IDR(hwmon_idr); -static DEFINE_SPINLOCK(idr_lock); +static DEFINE_IDA(hwmon_ida); /** * hwmon_device_register - register w/ hwmon @@ -42,30 +41,17 @@ static DEFINE_SPINLOCK(idr_lock); struct device *hwmon_device_register(struct device *dev) { struct device *hwdev; - int id, err; - -again: - if (unlikely(idr_pre_get(&hwmon_idr, GFP_KERNEL) == 0)) - return ERR_PTR(-ENOMEM); - - spin_lock(&idr_lock); - err = idr_get_new(&hwmon_idr, NULL, &id); - spin_unlock(&idr_lock); + int id; - if (unlikely(err == -EAGAIN)) - goto again; - else if (unlikely(err)) - return ERR_PTR(err); + id = ida_simple_get(&hwmon_ida, 0, 0, GFP_KERNEL); + if (id < 0) + return ERR_PTR(id); - id = id & MAX_ID_MASK; hwdev = device_create(hwmon_class, dev, MKDEV(0, 0), NULL, HWMON_ID_FORMAT, id); - if (IS_ERR(hwdev)) { - spin_lock(&idr_lock); - idr_remove(&hwmon_idr, id); - spin_unlock(&idr_lock); - } + if (IS_ERR(hwdev)) + ida_simple_remove(&hwmon_ida, id); return hwdev; } @@ -81,9 +67,7 @@ void hwmon_device_unregister(struct device *dev) if (likely(sscanf(dev_name(dev), HWMON_ID_FORMAT, &id) == 1)) { device_unregister(dev); - spin_lock(&idr_lock); - idr_remove(&hwmon_idr, id); - spin_unlock(&idr_lock); + ida_simple_remove(&hwmon_ida, id); } else dev_dbg(dev->parent, "hwmon_device_unregister() failed: bad class ID!\n"); -- 2.20.1