Patch "mmc: sdhci-acpi: support deferred probe" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

mmc: sdhci-acpi: support deferred probe

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
mmc-sdhci-acpi-support-deferred-probe.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Zhang Rui <[email protected]>
Date: Wed, 18 Jan 2017 17:46:18 +0800
Subject: mmc: sdhci-acpi: support deferred probe

From: Zhang Rui <[email protected]>

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

---
 drivers/mmc/host/sdhci-acpi.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

@@ -466,7 +466,10 @@ static int sdhci_acpi_probe(struct platf
 	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;
 		}

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/mmc-sdhci-acpi-support-deferred-probe.patch