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authorZhang Rui <rui.zhang@intel.com>2017-01-18 17:46:18 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-03-12 06:41:40 +0100
commit80bbadbc42f912b43fd6664e834ba16c9dd28889 (patch)
tree0b8bccfaf5303ab394f46bb39b7c1d96919494c8 /drivers/mmc
parent8d06cbd365e1fccb5b84bb8146d9bf30c2a55f4a (diff)
mmc: sdhci-acpi: support deferred probe
commit e28d6f048799acb0014491e6b74e580d84bd7916 upstream. 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. 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/sdhci-acpi.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c
index fddd0be196f4..80918abfc468 100644
--- a/drivers/mmc/host/sdhci-acpi.c
+++ b/drivers/mmc/host/sdhci-acpi.c
@@ -466,7 +466,10 @@ 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;
}