static int card_blk_open(struct block_device *bdev, fmode_t mode)
{
struct card_blk_data *card_data;
int ret = -ENXIO;
card_data = card_blk_get(bdev->bd_disk);
if (card_data) {
if (card_data->usage == 2)
check_disk_change(bdev);
ret = 0;
/*
* it would return -EROFS when FS/USB open card with O_RDWR.
* set sd_mmc_info->write_protected_flag in func sd_mmc_check_wp
* set card->state |= CARD_STATE_READONLY in func sd_open
* set card_data->read_only = 1 in func card_blk_alloc
*/
if ((mode & FMODE_WRITE) && card_data->read_only){
card_blk_put(bdev->bd_disk->private_data);
ret = -EROFS;
}
}
return ret;
}
static int card_blk_release(struct gendisk *disk, fmode_t mode)
{
struct card_blk_data *card_data = disk->private_data;
card_blk_put(card_data);
return 0;
}
static void card_blk_remove(struct memory_card *card)
{
struct card_blk_data *card_data = card_get_drvdata(card);
if (card_data) {
int devidx;
del_gendisk(card_data->disk);
/*
* I think this is needed.
*/
queue_flag_set_unlocked(QUEUE_FLAG_DEAD, card_data->queue.queue);
queue_flag_set_unlocked(QUEUE_FLAG_STOPPED, card_data->queue.queue);
card_data->queue.queue->queuedata = NULL;
card_cleanup_queue(&card_data->queue);
//card_data->disk->queue = NULL;
devidx = card_data->disk->first_minor >> CARD_SHIFT;
__clear_bit(devidx, dev_use);
card_blk_put(card_data);
}
card_set_drvdata(card, NULL);
}