diff options
| author | Zhang Rui <rui.zhang@intel.com> | 2017-01-18 17:46:18 +0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2017-02-13 13:20:26 +0100 |
| commit | e28d6f048799acb0014491e6b74e580d84bd7916 (patch) | |
| tree | ba52fe64e125a823a76f855ea2a37fc760211e4c /drivers/mmc/host | |
| parent | 23888bfe9bd730d42e326cc5f6f1188beb948f97 (diff) | |
mmc: sdhci-acpi: support deferred probe
With commit 67bf5156edc4 ("gpio / ACPI: fix returned error from
acpi_dev_gpio_irq_get()"), mmc_gpiod_request_cd() returns -EPROBE_DEFER if
GPIO is not ready when sdhci-acpi driver is probed, and sdhci-acpi driver
should be probed again later in this case.
This fixes an order issue when both GPIO and sdhci-acpi drivers are built
as modules.
CC: stable@vger.kernel.org # v4.9
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=177101
Tested-by: Jonas Aaberg <cja@gmx.net>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host')
| -rw-r--r-- | drivers/mmc/host/sdhci-acpi.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c index 278a5a435ab7..9dcb7048e3b1 100644 --- a/drivers/mmc/host/sdhci-acpi.c +++ b/drivers/mmc/host/sdhci-acpi.c @@ -467,7 +467,10 @@ static int sdhci_acpi_probe(struct platform_device *pdev) if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) { bool v = sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL); - if (mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0, NULL)) { + err = mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0, NULL); + if (err) { + if (err == -EPROBE_DEFER) + goto err_free; dev_warn(dev, "failed to setup card detect gpio\n"); c->use_runtime_pm = false; } |