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

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: 16b23787fc70 ("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>

diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index abd933b..5466f25 100644 (file)
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -457,7 +457,7 @@ 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;
 
                /*
@@ -481,7 +481,7 @@ 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;
 
        if (of_property_read_bool(np, "disable-wp"))