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mmc: sdhci: Do not reset cmd or data circuits that are in use 

In order to support commands during data transfer, it will be possible to
need to reset the command circuit while the data circuit is in use, and
vice versa. It is now easy to determine whether the command or data circuit
is in use, and so just skip the corresponding reset if it is.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Adrian Hunter 2016-06-29 16:24:36 +03:00 committed by Ulf Hansson
parent 0293d50110
commit 33a57adb6b
1 changed files with 8 additions and 5 deletions
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13
drivers/mmc/host/sdhci.c
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@ -986,9 +986,9 @@ static void sdhci_finish_mrq(struct sdhci_host *host, struct mmc_request *mrq)
static void sdhci_finish_data(struct sdhci_host *host)
{
struct mmc_data *data;
struct mmc_command *data_cmd = host->data_cmd;
struct mmc_data *data = host->data;
data = host->data;
host->data = NULL;
host->data_cmd = NULL;
@ -1022,7 +1022,8 @@ static void sdhci_finish_data(struct sdhci_host *host)
* upon error conditions.
*/
if (data->error) {
sdhci_do_reset(host, SDHCI_RESET_CMD);
if (!host->cmd || host->cmd == data_cmd)
sdhci_do_reset(host, SDHCI_RESET_CMD);
sdhci_do_reset(host, SDHCI_RESET_DATA);
}
@ -2305,8 +2306,10 @@ static bool sdhci_request_done(struct sdhci_host *host)
/* Spec says we should do both at the same time, but Ricoh
controllers do not like that. */
sdhci_do_reset(host, SDHCI_RESET_CMD);
sdhci_do_reset(host, SDHCI_RESET_DATA);
if (!host->cmd)
sdhci_do_reset(host, SDHCI_RESET_CMD);
if (!host->data_cmd)
sdhci_do_reset(host, SDHCI_RESET_DATA);
host->pending_reset = false;
}