Commit 40c96853 authored by Ulf Hansson's avatar Ulf Hansson
Browse files

mmc: core: Enable re-use of mmc_blk_in_tran_state() 



To allow subsequent changes to re-use the code from the static function
mmc_blk_in_tran_state(), let's move it to a public header. While at it,
let's also rename it to mmc_ready_for_data(), as to try to better describe
its purpose.

Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Tested-by: default avatarBaolin Wang <baolin.wang7@gmail.com>
Tested-by: default avatarLudovic Barre <ludovic.barre@st.com>
Reviewed-by: default avatarLudovic Barre <ludovic.barre@st.com>
Link: https://lore.kernel.org/r/20200204085449.32585-7-ulf.hansson@linaro.org
parent 6972096a

drivers/mmc/core/block.c

+4 −20
Original line number Diff line number Diff line
@@ -441,16 +441,6 @@ out: 
	return err;

}



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,

			    u32 *resp_errs)

{
@@ -482,13 +472,7 @@ static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms, 
				 __func__, status);

			return -ETIMEDOUT;

		}



		/*

		 * Some cards mishandle the status bits,

		 * so make sure to check both the busy

		 * indication and the card state.

		 */

	} while (!mmc_blk_in_tran_state(status));

	} while (!mmc_ready_for_data(status));



	return err;

}
@@ -1692,7 +1676,7 @@ static void mmc_blk_read_single(struct mmc_queue *mq, struct request *req) 
			goto error_exit;



		if (!mmc_host_is_spi(host) &&

		    !mmc_blk_in_tran_state(status)) {

		    !mmc_ready_for_data(status)) {

			err = mmc_blk_fix_state(card, req);

			if (err)

				goto error_exit;
@@ -1752,7 +1736,7 @@ static bool mmc_blk_status_error(struct request *req, u32 status) 
	return brq->cmd.resp[0]  & CMD_ERRORS    ||

	       brq->stop.resp[0] & stop_err_bits ||

	       status            & stop_err_bits ||

	       (rq_data_dir(req) == WRITE && !mmc_blk_in_tran_state(status));

	       (rq_data_dir(req) == WRITE && !mmc_ready_for_data(status));

}



static inline bool mmc_blk_cmd_started(struct mmc_blk_request *brq)
@@ -1814,7 +1798,7 @@ static void mmc_blk_mq_rw_recovery(struct mmc_queue *mq, struct request *req) 


	/* Try to get back to "tran" state */

	if (!mmc_host_is_spi(mq->card->host) &&

	    (err || !mmc_blk_in_tran_state(status)))

	    (err || !mmc_ready_for_data(status)))

		err = mmc_blk_fix_state(mq->card, req);



	/*

include/linux/mmc/mmc.h

+10 −0
Original line number Diff line number Diff line
@@ -161,6 +161,16 @@ static inline bool mmc_op_multi(u32 opcode) 
#define R1_STATE_PRG	7

#define R1_STATE_DIS	8



static inline bool mmc_ready_for_data(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;

}



/*

 * MMC/SD in SPI mode reports R1 status always, and R2 for SEND_STATUS

 * R1 is the low order byte; R2 is the next highest byte, when present.

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