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mmc: tmio: comment the ERR_PTR usage in this driver 

It is not super obvious why the driver sometimes uses an ERR_PTR for the
current mrq. Explain why in comments.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20240305105623.3379-2-wsa+renesas@sang-engineering.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Wolfram Sang 2024-03-05 11:56:24 +01:00 committed by Ulf Hansson
parent a5f372a1bb
commit 0cd8fd15a7
1 changed files with 3 additions and 1 deletions
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4
drivers/mmc/host/tmio_mmc_core.c
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@ -972,6 +972,7 @@ static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
return;
}
/* Disallow new mrqs and work handlers to run */
host->mrq = ERR_PTR(-EBUSY);
spin_unlock_irqrestore(&host->lock, flags);
@ -1006,8 +1007,9 @@ static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
"%s.%d: IOS interrupted: clk %u, mode %u",
current->comm, task_pid_nr(current),
ios->clock, ios->power_mode);
host->mrq = NULL;
/* Ready for new mrqs */
host->mrq = NULL;
host->clk_cache = ios->clock;
mutex_unlock(&host->ios_lock);