-/**
- * mmc_host_enable - enable a host.
- * @host: mmc host to enable
- *
- * Hosts that support power saving can use the 'enable' and 'disable'
- * methods to exit and enter power saving states. For more information
- * see comments for struct mmc_host_ops.
- */
-int mmc_host_enable(struct mmc_host *host)
-{
- if (!(host->caps & MMC_CAP_DISABLE))
- return 0;
-
- if (host->en_dis_recurs)
- return 0;
-
- if (host->nesting_cnt++)
- return 0;
-
- cancel_delayed_work_sync(&host->disable);
-
- if (host->enabled)
- return 0;
-
- if (host->ops->enable) {
- int err;
-
- host->en_dis_recurs = 1;
- mmc_host_clk_hold(host);
- err = host->ops->enable(host);
- mmc_host_clk_release(host);
- host->en_dis_recurs = 0;
-
- if (err) {
- pr_debug("%s: enable error %d\n",
- mmc_hostname(host), err);
- return err;
- }
- }
- host->enabled = 1;
- return 0;
-}
-EXPORT_SYMBOL(mmc_host_enable);
-
-static int mmc_host_do_disable(struct mmc_host *host, int lazy)
-{
- if (host->ops->disable) {
- int err;
-
- host->en_dis_recurs = 1;
- mmc_host_clk_hold(host);
- err = host->ops->disable(host, lazy);
- mmc_host_clk_release(host);
- host->en_dis_recurs = 0;
-
- if (err < 0) {
- pr_debug("%s: disable error %d\n",
- mmc_hostname(host), err);
- return err;
- }
- if (err > 0) {
- unsigned long delay = msecs_to_jiffies(err);
-
- mmc_schedule_delayed_work(&host->disable, delay);
- }
- }
- host->enabled = 0;
- return 0;
-}
-
-/**
- * mmc_host_disable - disable a host.
- * @host: mmc host to disable
- *
- * Hosts that support power saving can use the 'enable' and 'disable'
- * methods to exit and enter power saving states. For more information
- * see comments for struct mmc_host_ops.
- */
-int mmc_host_disable(struct mmc_host *host)
-{
- int err;
-
- if (!(host->caps & MMC_CAP_DISABLE))
- return 0;
-
- if (host->en_dis_recurs)
- return 0;
-
- if (--host->nesting_cnt)
- return 0;
-
- if (!host->enabled)
- return 0;
-
- err = mmc_host_do_disable(host, 0);
- return err;
-}
-EXPORT_SYMBOL(mmc_host_disable);
-