4 files changed, 27 insertions, 15 deletions

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index b5d8a6d90cca..e08aa352bd50 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 1433d95c40bb..6a7e29849603 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 848b5f5c2344..ee9a1b9f5998 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
  *
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index 04bbe12fae8d..63a80ea61124 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h
@@ -99,7 +99,7 @@ struct mmc_request {
 struct mmc_host;
 struct mmc_card;
 
-extern int mmc_wait_for_req(struct mmc_host *, struct mmc_request *);
+extern void mmc_wait_for_req(struct mmc_host *, struct mmc_request *);
 extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int);
 extern int mmc_wait_for_app_cmd(struct mmc_host *, struct mmc_card *,
         struct mmc_command *, int);