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mmc: core: Don't return an error for CD/WP GPIOs when GPIOLIB is unset

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commit 43934ece2e upstream.

When CONFIG_GPIOLIB is unset, its stubs will return -ENOSYS. That means
when the mmc core parses DT for CD/WP GPIOs via mmc_of_parse(), -ENOSYS
becomes propagated to the caller. Typically this means that the mmc host
driver fails to probe.

As the CD/WP GPIOs are already treated as optional, let's extend that to
cover the case when CONFIG_GPIOLIB is unset.

Reported-by: Michal Simek <michal.simek@xilinx.com>
Fixes: 16b23787fc ("mmc: sdhci-of-arasan: Call OF parsing for MMC")
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Venu Byravarasu <vbyravarasu@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ulf Hansson
2015-09-14 12:18:55 +02:00
committed by Greg Kroah-Hartman
parent c1d40e01ad
commit 344fa142dd
1 changed files with 2 additions and 2 deletions
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4
drivers/mmc/core/host.c
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@@ -373,7 +373,7 @@ int mmc_of_parse(struct mmc_host *host)
0, &cd_gpio_invert);
if (!ret)
dev_info(host->parent, "Got CD GPIO\n");
else if (ret != -ENOENT)
else if (ret != -ENOENT && ret != -ENOSYS)
return ret;
/*
@@ -397,7 +397,7 @@ int mmc_of_parse(struct mmc_host *host)
ret = mmc_gpiod_request_ro(host, "wp", 0, false, 0, &ro_gpio_invert);
if (!ret)
dev_info(host->parent, "Got WP GPIO\n");
else if (ret != -ENOENT)
else if (ret != -ENOENT && ret != -ENOSYS)
return ret;
/* See the comment on CD inversion above */