From: Ulf Hansson ulf.hansson@linaro.org
commit 533a6cfe08f96a7b5c65e06d20916d552c11b256 upstream
All callers of __mmc_switch() should now be specifying a valid timeout for the CMD6 command. However, just to be sure, let's print a warning and default to use the generic_cmd6_time in case the provided timeout_ms argument is zero.
In this context, let's also simplify some of the corresponding code and clarify some related comments.
Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Link: https://lore.kernel.org/r/20200122142747.5690-4-ulf.hansson@linaro.org Signed-off-by: Florian Fainelli f.fainelli@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/mmc/core/mmc_ops.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-)
--- a/drivers/mmc/core/mmc_ops.c +++ b/drivers/mmc/core/mmc_ops.c @@ -458,10 +458,6 @@ static int mmc_poll_for_busy(struct mmc_ bool expired = false; bool busy = false;
- /* We have an unspecified cmd timeout, use the fallback value. */ - if (!timeout_ms) - timeout_ms = MMC_OPS_TIMEOUT_MS; - /* * In cases when not allowed to poll by using CMD13 or because we aren't * capable of polling by using ->card_busy(), then rely on waiting the @@ -534,14 +530,20 @@ int __mmc_switch(struct mmc_card *card,
mmc_retune_hold(host);
+ if (!timeout_ms) { + pr_warn("%s: unspecified timeout for CMD6 - use generic\n", + mmc_hostname(host)); + timeout_ms = card->ext_csd.generic_cmd6_time; + } + /* * If the cmd timeout and the max_busy_timeout of the host are both * specified, let's validate them. A failure means we need to prevent * the host from doing hw busy detection, which is done by converting * to a R1 response instead of a R1B. */ - if (timeout_ms && host->max_busy_timeout && - (timeout_ms > host->max_busy_timeout)) + if (host->max_busy_timeout && + (timeout_ms > host->max_busy_timeout)) use_r1b_resp = false;
cmd.opcode = MMC_SWITCH; @@ -552,10 +554,6 @@ int __mmc_switch(struct mmc_card *card, cmd.flags = MMC_CMD_AC; if (use_r1b_resp) { cmd.flags |= MMC_RSP_SPI_R1B | MMC_RSP_R1B; - /* - * A busy_timeout of zero means the host can decide to use - * whatever value it finds suitable. - */ cmd.busy_timeout = timeout_ms; } else { cmd.flags |= MMC_RSP_SPI_R1 | MMC_RSP_R1;