linux-kernel - [PATCH] mmc: alcor: Fix a resource leak in an error handling path in 'alcor_pci_sdmmc_drv

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Date:   Sun, 26 Apr 2020 22:23:55 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     ulf.hansson@...aro.org, drake@...lessm.com,
        kamlesh.gurudasani@...il.com, colin.king@...onical.com,
        linux@...pel-privat.de
Cc:     linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] mmc: alcor: Fix a resource leak in an error handling path in 'alcor_pci_sdmmc_drv_probe()'

If 'devm_request_threaded_irq()' fails, resources allocated by
'mmc_alloc_host()' must be freed.

Fixes: c5413ad815a6 ("mmc: add new Alcor Micro Cardreader SD/MMC driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 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 1aee485d56d4..026ca9194ce5 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)
-- 
2.25.1