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mmc: tmio: clear force_pio flag before starting data transfer 

Currently, force_pio is cleared when the driver exits.  Then, it
resulted in clearing it in multiple places since MMC drivers in
general have multiple exit points.

 tmio_mmc_reset_work - bails out on timeout
 tmio_process_mrq - error out when it cannot send a command
 tmio_mmc_finish_request - successful exit

This is error-prone since we may miss to cover all bail-out points.

To simplify the code, the data structure should be initialized just
before used since we have a single entrance.  force_pio is only used
for data transfer, so tmio_mmc_start_data() will be a suitable place
to clear this flag.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Masahiro Yamada 2018-01-18 01:28:15 +09:00 committed by Ulf Hansson
parent b12a7a28f8
commit 9b3ab55dba
1 changed files with 1 additions and 3 deletions
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4
drivers/mmc/host/tmio_mmc_core.c
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@ -278,7 +278,6 @@ static void tmio_mmc_reset_work(struct work_struct *work)
host->cmd = NULL;
host->data = NULL;
host->force_pio = false;
spin_unlock_irqrestore(&host->lock, flags);
@ -759,6 +758,7 @@ static int tmio_mmc_start_data(struct tmio_mmc_host *host,
tmio_mmc_init_sg(host, data);
host->data = data;
host->force_pio = false;
/* Set transfer length / blocksize */
sd_ctrl_write16(host, CTL_SD_XFER_LEN, data->blksz);
@ -850,7 +850,6 @@ static void tmio_process_mrq(struct tmio_mmc_host *host,
return;
fail:
host->force_pio = false;
host->mrq = NULL;
mrq->cmd->error = ret;
mmc_request_done(host->mmc, mrq);
@ -900,7 +899,6 @@ static void tmio_mmc_finish_request(struct tmio_mmc_host *host)
if (host->cmd != mrq->sbc) {
host->cmd = NULL;
host->data = NULL;
host->force_pio = false;
host->mrq = NULL;
}