Commit 2bc02485 authored by Arend van Spriel's avatar Arend van Spriel Committed by Chris Ball

sdhci: only reprogram retuning timer when flag is set

When the host->tuning_count is zero it means that the retuning is
disabled. This is checked on the first run of sdhci_execute_tuning()
by the if statement below:

	if (!(host->flags & SDHCI_NEEDS_RETUNING) && host->tuning_count &&
	    (host->tuning_mode == SDHCI_TUNING_MODE_1)) {

So only when tuning_count is non-zero it will set the host flag
SDHCI_USING_RETUNING_TIMER. The else statement is only for re-programming
the timer, which means that flag must be set. Because that is not checked
the else statement is executed in the first run when tuning_count is zero.

This was seen on a host controller which indicated SDHCI_TUNING_MODE_1 (0)
and tuning_count being zero. Suspect that (one of) these registers is not
properly set.
Signed-off-by: default avatarArend van Spriel <arend@broadcom.com>
Acked-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Reviewed-by: default avatarAaron Lu <aaron.lu@intel.com>
Signed-off-by: default avatarChris Ball <chris@printf.net>
parent fc2bd2e4
...@@ -2026,10 +2026,9 @@ static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode) ...@@ -2026,10 +2026,9 @@ static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)
host->tuning_count * HZ); host->tuning_count * HZ);
/* Tuning mode 1 limits the maximum data length to 4MB */ /* Tuning mode 1 limits the maximum data length to 4MB */
mmc->max_blk_count = (4 * 1024 * 1024) / mmc->max_blk_size; mmc->max_blk_count = (4 * 1024 * 1024) / mmc->max_blk_size;
} else { } else if (host->flags & SDHCI_USING_RETUNING_TIMER) {
host->flags &= ~SDHCI_NEEDS_RETUNING; host->flags &= ~SDHCI_NEEDS_RETUNING;
/* Reload the new initial value for timer */ /* Reload the new initial value for timer */
if (host->tuning_mode == SDHCI_TUNING_MODE_1)
mod_timer(&host->tuning_timer, jiffies + mod_timer(&host->tuning_timer, jiffies +
host->tuning_count * HZ); host->tuning_count * HZ);
} }
......
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