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-rw-r--r--drivers/mmc/core/core.c31
-rw-r--r--drivers/mmc/core/host.c7
-rw-r--r--drivers/mmc/core/sd_ops.c2
3 files changed, 26 insertions, 14 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index b5d8a6d90cc..e08aa352bd5 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -140,7 +140,16 @@ static void mmc_wait_done(struct mmc_request *mrq)
complete(mrq->done_data);
}
-int mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq)
+/**
+ * mmc_wait_for_req - start a request and wait for completion
+ * @host: MMC host to start command
+ * @mrq: MMC request to start
+ *
+ * Start a new MMC custom command request for a host, and wait
+ * for the command to complete. Does not attempt to parse the
+ * response.
+ */
+void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq)
{
DECLARE_COMPLETION_ONSTACK(complete);
@@ -150,8 +159,6 @@ int mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq)
mmc_start_request(host, mrq);
wait_for_completion(&complete);
-
- return 0;
}
EXPORT_SYMBOL(mmc_wait_for_req);
@@ -192,6 +199,9 @@ EXPORT_SYMBOL(mmc_wait_for_cmd);
* @data: data phase for command
* @card: the MMC card associated with the data transfer
* @write: flag to differentiate reads from writes
+ *
+ * Computes the data timeout parameters according to the
+ * correct algorithm given the card type.
*/
void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card,
int write)
@@ -240,15 +250,10 @@ void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card,
EXPORT_SYMBOL(mmc_set_data_timeout);
/**
- * __mmc_claim_host - exclusively claim a host
+ * mmc_claim_host - exclusively claim a host
* @host: mmc host to claim
- * @card: mmc card to claim host for
- *
- * Claim a host for a set of operations. If a valid card
- * is passed and this wasn't the last card selected, select
- * the card before returning.
*
- * Note: you should use mmc_card_claim_host or mmc_claim_host.
+ * Claim a host for a set of operations.
*/
void mmc_claim_host(struct mmc_host *host)
{
@@ -498,8 +503,10 @@ void __mmc_release_bus(struct mmc_host *host)
* @host: host which changed state.
* @delay: optional delay to wait before detection (jiffies)
*
- * All we know is that card(s) have been inserted or removed
- * from the socket(s). We don't know which socket or cards.
+ * MMC drivers should call this when they detect a card has been
+ * inserted or removed. The MMC layer will confirm that any
+ * present card is still functional, and initialize any newly
+ * inserted.
*/
void mmc_detect_change(struct mmc_host *host, unsigned long delay)
{
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index 1433d95c40b..6a7e2984960 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -93,6 +93,10 @@ EXPORT_SYMBOL(mmc_alloc_host);
/**
* mmc_add_host - initialise host hardware
* @host: mmc host
+ *
+ * Register the host with the driver model. The host must be
+ * prepared to start servicing requests before this function
+ * completes.
*/
int mmc_add_host(struct mmc_host *host)
{
@@ -126,7 +130,8 @@ EXPORT_SYMBOL(mmc_add_host);
* @host: mmc host
*
* Unregister and remove all cards associated with this host,
- * and power down the MMC bus.
+ * and power down the MMC bus. No new requests will be issued
+ * after this function has returned.
*/
void mmc_remove_host(struct mmc_host *host)
{
diff --git a/drivers/mmc/core/sd_ops.c b/drivers/mmc/core/sd_ops.c
index 848b5f5c234..ee9a1b9f599 100644
--- a/drivers/mmc/core/sd_ops.c
+++ b/drivers/mmc/core/sd_ops.c
@@ -25,7 +25,7 @@
* mmc_wait_for_app_cmd - start an application command and wait for
completion
* @host: MMC host to start command
- * @rca: RCA to send MMC_APP_CMD to
+ * @card: Card to send MMC_APP_CMD to
* @cmd: MMC command to start
* @retries: maximum number of retries
*