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Subject[PATCH 4.14 28/75] mmc: tmio: check mmc_regulator_get_supply return value
Date
4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Fabrizio Castro <fabrizio.castro@bp.renesas.com>


[ Upstream commit a3d95d1d4007b1fefd6d8b12db26fda05de05cfb ]

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>
---
drivers/mmc/host/tmio_mmc_core.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/mmc/host/tmio_mmc_core.c
+++ b/drivers/mmc/host/tmio_mmc_core.c
@@ -1113,8 +1113,11 @@ static int tmio_mmc_init_ocr(struct tmio
{
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)

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