diff options
| -rw-r--r-- | drivers/mmc/core/core.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 843edbed3ac9..2e94974d4d14 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -2767,6 +2767,30 @@ out: return; } +static bool mmc_is_vaild_state_for_clk_scaling(struct mmc_host *host) +{ + struct mmc_card *card = host->card; + u32 status; + bool ret = false; + + if (!card) + goto out; + + if (mmc_send_status(card, &status)) { + pr_err("%s: Get card status fail\n", mmc_hostname(card->host)); + goto out; + } + + switch (R1_CURRENT_STATE(status)) { + case R1_STATE_TRAN: + ret = true; + break; + default: + break; + } +out: + return ret; +} /** * mmc_clk_scaling() - clock scaling decision algorithm @@ -2839,6 +2863,10 @@ static void mmc_clk_scaling(struct mmc_host *host, bool from_wq) if (!from_wq) cancel_delayed_work_sync( &host->clk_scaling.work); + + if (!mmc_is_vaild_state_for_clk_scaling(host)) + goto bypass_scaling; + err = host->bus_ops->change_bus_speed(host, &freq); if (!err) host->clk_scaling.curr_freq = freq; @@ -2860,6 +2888,7 @@ static void mmc_clk_scaling(struct mmc_host *host, bool from_wq) } mmc_reset_clk_scale_stats(host); +bypass_scaling: host->clk_scaling.in_progress = false; out: return; |