mmc: block: Check for transfer state in card_busy_detect()

The card is required to return to transfer state. Since that is the state
required to start another transfer, check for that state instead of
programming state.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index f7c387c..0b40fc2 100644 (file)
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -922,6 +922,16 @@ static int mmc_sd_num_wr_blocks(struct mmc_card *card, u32 *written_blocks)
        return 0;
 }
 
+static inline bool mmc_blk_in_tran_state(u32 status)
+{
+       /*
+        * Some cards mishandle the status bits, so make sure to check both the
+        * busy indication and the card state.
+        */
+       return status & R1_READY_FOR_DATA &&
+              (R1_CURRENT_STATE(status) == R1_STATE_TRAN);
+}
+
 static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
                            bool hw_busy_detect, struct request *req,
                            u32 *resp_errs)
@@ -954,9 +964,9 @@ static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
                 * leaves the program state.
                 */
                if (done) {
-                       pr_err("%s: Card stuck in programming state! %s %s\n",
+                       pr_err("%s: Card stuck in wrong state! %s %s status: %#x\n",
                                mmc_hostname(card->host),
-                               req->rq_disk->disk_name, __func__);
+                               req->rq_disk->disk_name, __func__, status);
                        return -ETIMEDOUT;
                }
 
@@ -965,8 +975,7 @@ static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
                 * so make sure to check both the busy
                 * indication and the card state.
                 */
-       } while (!(status & R1_READY_FOR_DATA) ||
-                (R1_CURRENT_STATE(status) == R1_STATE_PRG));
+       } while (!mmc_blk_in_tran_state(status));
 
        return err;
 }