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mmc: sdio: Check the return value of sdio_enable_4bit_bus 

Since we could move card->host->caps & MMC_CAP_4_BIT_DATA
ahead of mmc_sdio_init_uhs_card, in mmc_host_uhs(). So there
we could save this bit to check that. Also, if the process of
sdio_enable_4bit_bus goes wrong, we should bails out early.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Shawn Lin 2018-02-27 09:26:34 +08:00 committed by Ulf Hansson
parent d6743a8a1a
commit 1e178270df
1 changed files with 4 additions and 5 deletions
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9
drivers/mmc/core/sdio.c
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@ -518,11 +518,10 @@ static int mmc_sdio_init_uhs_card(struct mmc_card *card)
if (!card->scr.sda_spec3)
return 0;
/*
* Switch to wider bus (if supported).
*/
if (card->host->caps & MMC_CAP_4_BIT_DATA)
err = sdio_enable_4bit_bus(card);
/* Switch to wider bus */
err = sdio_enable_4bit_bus(card);
if (err)
goto out;
/* Set the driver strength for the card */
sdio_select_driver_type(card);