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mmc: tmio: check mmc_regulator_get_supply return value

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[ Upstream commit a3d95d1d40 ]

mmc_regulator_get_supply returns -EPROBE_DEFER if either vmmc or
vqmmc regulators had their probing deferred.
vqmmc regulator is needed by UHS to work properly, therefore this
patch checks the value returned by mmc_regulator_get_supply to
make sure we have a reference to both vmmc and vqmmc (if found in
the DT).

Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Fabrizio Castro
2017-09-22 12:22:17 +01:00
committed by Greg Kroah-Hartman
parent 4507d57777
commit 2ef27d5642
1 changed files with 4 additions and 1 deletions
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5
drivers/mmc/host/tmio_mmc_core.c
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@@ -1113,8 +1113,11 @@ static int tmio_mmc_init_ocr(struct tmio_mmc_host *host)
{
struct tmio_mmc_data *pdata = host->pdata;
struct mmc_host *mmc = host->mmc;
int err;
mmc_regulator_get_supply(mmc);
err = mmc_regulator_get_supply(mmc);
if (err)
return err;
/* use ocr_mask if no regulator */
if (!mmc->ocr_avail)