[PATCH v2] mmc: sdhci-acpi: support deferred probe
From: Zhang Rui <rui.zhang@intel.com>
Date: 2017-01-11 01:57:01
Also in:
linux-mmc
Subsystem:
multimedia card (mmc), secure digital (sd) and sdio subsystem, secure digital host controller interface (sdhci) driver, the rest · Maintainers:
Ulf Hansson, Adrian Hunter, Linus Torvalds
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 <redacted> Signed-off-by: Zhang Rui <rui.zhang@intel.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> --- drivers/mmc/host/sdhci-acpi.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c
index 160f695..5440323 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; }
--
2.7.4