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mmc: core: Fix access to HS400-ES devices

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HS400-ES devices fail to initialize with the following error messages.

mmc1: power class selection to bus width 8 ddr 0 failed
mmc1: error -110 whilst initialising MMC card

This was seen on Samsung Chromebook Plus. Code analysis points to
commit 3d4ef32975 ("mmc: core: fix multi-bit bus width without
high-speed mode"), which attempts to set the bus width for all but
HS200 devices unconditionally. However, for HS400-ES, the bus width
is already selected.

Cc: Anssi Hannula <[email protected]>
Cc: Douglas Anderson <[email protected]>
Cc: Brian Norris <[email protected]>
Fixes: 3d4ef32975 ("mmc: core: fix multi-bit bus width ...")
Signed-off-by: Guenter Roeck <[email protected]>
Reviewed-by: Douglas Anderson <[email protected]>
Reviewed-by: Shawn Lin <[email protected]>
Tested-by: Heiko Stuebner <[email protected]>
Cc: <[email protected]>
Signed-off-by: Ulf Hansson <[email protected]>
This commit is contained in:
Guenter Roeck 2017-03-01 14:11:47 -08:00 • committed by Ulf Hansson
commit 773dc11875
1 changed files with 1 additions and 1 deletions
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2
drivers/mmc/core/mmc.c
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@ -1730,7 +1730,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
err = mmc_select_hs400(card);
if (err)
goto free_card;
} else {
} else if (!mmc_card_hs400es(card)) {
/* Select the desired bus width optionally */
err = mmc_select_bus_width(card);
if (err > 0 && mmc_card_hs(card)) {