mmc: alcor: Fix a resource leak in the error path for ->probe()

[ 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@wanadoo.fr>
Link: https://lore.kernel.org/r/20200426202355.43055-1-christophe.jaillet@wanadoo.fr
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/mmc/host/alcor.c b/drivers/mmc/host/alcor.c
index 1aee485..026ca91 100644 (file)
--- 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)