From mboxrd@z Thu Jan 1 00:00:00 1970 From: Zhang Rui Subject: [PATCH v3] mmc: sdhci-acpi: support deferred probe Date: Fri, 13 Jan 2017 19:03:35 +0800 Message-ID: <1484305415.2221.45.camel@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit Return-path: Received: from mga09.intel.com ([134.134.136.24]:57654 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751529AbdAMLDl (ORCPT ); Fri, 13 Jan 2017 06:03:41 -0500 Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: linux-mmc Cc: cja@gmx.net, darcari@redhat.com, ulf.hansson@linaro.org, adrain >>From c889f737322b797b743c63eda241d0283696d3f5 Mon Sep 17 00:00:00 2001 From: Zhang Rui Date: Wed, 7 Dec 2016 13:13:31 +0800 Subject: [PATCH v3] 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 Signed-off-by: Zhang Rui Acked-by: Adrian Hunter ---  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 160f695cc09c..5440323894ee 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