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Commit a04848c7 authored by Heiner Kallweit's avatar Heiner Kallweit Committed by Ulf Hansson
Browse files

mmc: core: switch to ida_simple_ functions in block.c 



ida code in block.c can be significantly simplified by switching to
the ida_simple_ functions.

Signed-off-by: default avatarHeiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent a53210f5

drivers/mmc/core/block.c

+5 −26
Original line number Diff line number Diff line
@@ -90,7 +90,6 @@ static int max_devices; 
#define MAX_DEVICES 256



static DEFINE_IDA(mmc_blk_ida);

static DEFINE_SPINLOCK(mmc_blk_lock);



/*

 * There is one mmc_blk_data per slot.
@@ -163,11 +162,7 @@ static void mmc_blk_put(struct mmc_blk_data *md) 
	if (md->usage == 0) {

		int devidx = mmc_get_devidx(md->disk);

		blk_cleanup_queue(md->queue.queue);



		spin_lock(&mmc_blk_lock);

		ida_remove(&mmc_blk_ida, devidx);

		spin_unlock(&mmc_blk_lock);



		ida_simple_remove(&mmc_blk_ida, devidx);

		put_disk(md->disk);

		kfree(md);

	}
@@ -1839,23 +1834,9 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card, 
	struct mmc_blk_data *md;

	int devidx, ret;



again:

	if (!ida_pre_get(&mmc_blk_ida, GFP_KERNEL))

		return ERR_PTR(-ENOMEM);



	spin_lock(&mmc_blk_lock);

	ret = ida_get_new(&mmc_blk_ida, &devidx);

	spin_unlock(&mmc_blk_lock);



	if (ret == -EAGAIN)

		goto again;

	else if (ret)

		return ERR_PTR(ret);



	if (devidx >= max_devices) {

		ret = -ENOSPC;

		goto out;

	}

	devidx = ida_simple_get(&mmc_blk_ida, 0, max_devices, GFP_KERNEL);

	if (devidx < 0)

		return ERR_PTR(devidx);



	md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);

	if (!md) {
@@ -1944,9 +1925,7 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card, 
 err_kfree:

	kfree(md);

 out:

	spin_lock(&mmc_blk_lock);

	ida_remove(&mmc_blk_ida, devidx);

	spin_unlock(&mmc_blk_lock);

	ida_simple_remove(&mmc_blk_ida, devidx);

	return ERR_PTR(ret);

}