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

Message ID 1330616671-11952-1-git-send-email-ulf.hansson@stericsson.com
State New
Headers show

Commit Message

Ulf Hansson March 1, 2012, 3:44 p.m.
Make sure mmc_start_req cancel 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>
---
 drivers/mmc/core/core.c |   35 +++++++++++++++--------------------
 1 files changed, 15 insertions(+), 20 deletions(-)

Patch

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 0b317f0..9e562ab 100644
--- 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:
+	if (err || start_err) {
+		if (areq)
+			/* The prepared request was not started, cancel it. */
+			mmc_post_req(host, areq->mrq, -EINVAL);
+		host->areq = NULL;
+	} else {
+		host->areq = areq;
+	}
+
 	if (error)
 		*error = err;
 	return data;