The patch below does not apply to the 4.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From d58ac803cfbb92ede501409dd6afe9abb111d4f1 Mon Sep 17 00:00:00 2001

From: Adrian Hunter adrian.hunter@intel.com Date: Wed, 21 Mar 2018 11:49:40 +0200 Subject: [PATCH] mmc: sdhci-acpi: Fix IRQ 0

Zero is a valid IRQ number and is being used on some CHT tablets. Stop treating it as an error.

Reported-by: Luke Ross luke@lukeross.name Fixes: 1b7ba57ecc86 ("mmc: sdhci-acpi: Handle return value of platform_get_irq") Cc: Arvind Yadav arvind.yadav.cs@gmail.com Signed-off-by: Adrian Hunter adrian.hunter@intel.com Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson ulf.hansson@linaro.org

diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c index 4065da58789d..32321bd596d8 100644 --- a/drivers/mmc/host/sdhci-acpi.c +++ b/drivers/mmc/host/sdhci-acpi.c @@ -680,7 +680,7 @@ static int sdhci_acpi_probe(struct platform_device *pdev) host->hw_name = "ACPI"; host->ops = &sdhci_acpi_ops_dflt; host->irq = platform_get_irq(pdev, 0); - if (host->irq <= 0) { + if (host->irq < 0) { err = -EINVAL; goto err_free; }