From c7da0d94cb74f22fb6e112e1b2ee3c757a38cb05 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 20 Feb 2013 13:16:15 +1100 Subject: [PATCH] i2c: convert to idr_alloc() Convert to the much saner new idr interface. Only compile tested. Signed-off-by: Tejun Heo Cc: Jean Delvare Cc: Wolfram Sang Tested-by: Mark Brown Signed-off-by: Andrew Morton --- drivers/i2c/i2c-core.c | 45 ++++++++++-------------------------------- 1 file changed, 10 insertions(+), 35 deletions(-) diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 66a30f7ac882..795c916cf42a 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -935,25 +935,16 @@ out_list: */ int i2c_add_adapter(struct i2c_adapter *adapter) { - int id, res = 0; - -retry: - if (idr_pre_get(&i2c_adapter_idr, GFP_KERNEL) == 0) - return -ENOMEM; + int res; mutex_lock(&core_lock); - /* "above" here means "above or equal to", sigh */ - res = idr_get_new_above(&i2c_adapter_idr, adapter, - __i2c_first_dynamic_bus_num, &id); + res = idr_alloc(&i2c_adapter_idr, adapter, + __i2c_first_dynamic_bus_num, 0, GFP_KERNEL); mutex_unlock(&core_lock); - - if (res < 0) { - if (res == -EAGAIN) - goto retry; + if (res < 0) return res; - } - adapter->nr = id; + adapter->nr = res; return i2c_register_adapter(adapter); } EXPORT_SYMBOL(i2c_add_adapter); @@ -984,33 +975,17 @@ EXPORT_SYMBOL(i2c_add_adapter); int i2c_add_numbered_adapter(struct i2c_adapter *adap) { int id; - int status; if (adap->nr == -1) /* -1 means dynamically assign bus id */ return i2c_add_adapter(adap); - if (adap->nr & ~MAX_IDR_MASK) - return -EINVAL; - -retry: - if (idr_pre_get(&i2c_adapter_idr, GFP_KERNEL) == 0) - return -ENOMEM; mutex_lock(&core_lock); - /* "above" here means "above or equal to", sigh; - * we need the "equal to" result to force the result - */ - status = idr_get_new_above(&i2c_adapter_idr, adap, adap->nr, &id); - if (status == 0 && id != adap->nr) { - status = -EBUSY; - idr_remove(&i2c_adapter_idr, id); - } + id = idr_alloc(&i2c_adapter_idr, adap, adap->nr, adap->nr + 1, + GFP_KERNEL); mutex_unlock(&core_lock); - if (status == -EAGAIN) - goto retry; - - if (status == 0) - status = i2c_register_adapter(adap); - return status; + if (id < 0) + return id == -ENOSPC ? -EBUSY : id; + return 0; } EXPORT_SYMBOL_GPL(i2c_add_numbered_adapter); -- 2.39.5