linux-kernel - [PATCH 5.6 089/194] mmc: alcor: Fix a resource leak in the error path for ->probe()

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Date:   Mon, 18 May 2020 19:36:19 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.6 089/194] mmc: alcor: Fix a resource leak in the error path for ->probe()

From: Christophe JAILLET <christophe.jaillet@...adoo.fr>

[ Upstream commit 7c277dd2b0ff6a16f1732a66c2c52a29f067163e ]

If devm_request_threaded_irq() fails, the allocated struct mmc_host needs
to be freed via calling mmc_free_host(), so let's do that.

Fixes: c5413ad815a6 ("mmc: add new Alcor Micro Cardreader SD/MMC driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Link: https://lore.kernel.org/r/20200426202355.43055-1-christophe.jaillet@wanadoo.fr
Cc: stable@...r.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/mmc/host/alcor.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/alcor.c b/drivers/mmc/host/alcor.c
index 1aee485d56d4c..026ca9194ce5b 100644
--- a/drivers/mmc/host/alcor.c
+++ b/drivers/mmc/host/alcor.c
@@ -1104,7 +1104,7 @@ static int alcor_pci_sdmmc_drv_probe(struct platform_device *pdev)
 
 	if (ret) {
 		dev_err(&pdev->dev, "Failed to get irq for data line\n");
-		return ret;
+		goto free_host;
 	}
 
 	mutex_init(&host->cmd_mutex);
@@ -1116,6 +1116,10 @@ static int alcor_pci_sdmmc_drv_probe(struct platform_device *pdev)
 	dev_set_drvdata(&pdev->dev, host);
 	mmc_add_host(mmc);
 	return 0;
+
+free_host:
+	mmc_free_host(mmc);
+	return ret;
 }
 
 static int alcor_pci_sdmmc_drv_remove(struct platform_device *pdev)
-- 
2.20.1