mmc: core: Clean up after mmc_pre_req if card was removed

Make sure mmc_start_req cancels the prepared job, if the request
was prevented to be started due to the card has been removed.

This bug was introduced in commit:
mmc: allow upper layers to know immediately if card has been removed

Signed-off-by: Ulf Hansson <ulf.hansson@stericsson.com>
Reviewed-by: Per Forlin <per.forlin@stericsson.com>
Tested-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 9b56674..14f262e 100644 (file)
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -249,16 +249,17 @@ static void mmc_wait_done(struct mmc_request *mrq)
        complete(&mrq->completion);
 }
 
-static void __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq)
+static int __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq)
 {
        init_completion(&mrq->completion);
        mrq->done = mmc_wait_done;
        if (mmc_card_removed(host->card)) {
                mrq->cmd->error = -ENOMEDIUM;
                complete(&mrq->completion);
-               return;
+               return -ENOMEDIUM;
        }
        mmc_start_request(host, mrq);
+       return 0;
 }
 
 static void mmc_wait_for_req_done(struct mmc_host *host,
@@ -342,6 +343,7 @@ struct mmc_async_req *mmc_start_req(struct mmc_host *host,
                                    struct mmc_async_req *areq, int *error)
 {
        int err = 0;
+       int start_err = 0;
        struct mmc_async_req *data = host->areq;
 
        /* Prepare a new request */
@@ -351,30 +353,23 @@ struct mmc_async_req *mmc_start_req(struct mmc_host *host,
        if (host->areq) {
                mmc_wait_for_req_done(host, host->areq->mrq);
                err = host->areq->err_check(host->card, host->areq);
-               if (err) {
-                       /* post process the completed failed request */
-                       mmc_post_req(host, host->areq->mrq, 0);
-                       if (areq)
-                               /*
-                                * Cancel the new prepared request, because
-                                * it can't run until the failed
-                                * request has been properly handled.
-                                */
-                               mmc_post_req(host, areq->mrq, -EINVAL);
-
-                       host->areq = NULL;
-                       goto out;
-               }
        }
 
-       if (areq)
-               __mmc_start_req(host, areq->mrq);
+       if (!err && areq)
+               start_err = __mmc_start_req(host, areq->mrq);
 
        if (host->areq)
                mmc_post_req(host, host->areq->mrq, 0);
 
-       host->areq = areq;
- out:
+        /* Cancel a prepared request if it was not started. */
+       if ((err || start_err) && areq)
+                       mmc_post_req(host, areq->mrq, -EINVAL);
+
+       if (err)
+               host->areq = NULL;
+       else
+               host->areq = areq;
+
        if (error)
                *error = err;
        return data;