From 222cfa0118aa68687ace74aab8fdf77ce8fbd7e6 Mon Sep 17 00:00:00 2001
From: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Date: Mon, 14 Nov 2022 16:31:00 +0800
Subject: [PATCH] mmc: sdhci-pci: Fix possible memory leak caused by missing pci_dev_put()
Git-commit: 222cfa0118aa68687ace74aab8fdf77ce8fbd7e6
Patch-mainline: v6.1-rc6
References: git-fixes
pci_get_device() will increase the reference count for the returned
pci_dev. We need to use pci_dev_put() to decrease the reference count
before amd_probe() returns. There is no problem for the 'smbus_dev ==
NULL' branch because pci_dev_put() can also handle the NULL input
parameter case.
Fixes: 659c9bc114a8 ("mmc: sdhci-pci: Build o2micro support in the same module")
Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20221114083100.149200-1-wangxiongfeng2@huawei.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/mmc/host/sdhci-pci-core.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
index 34ea1acbb3cc..28dc65023fa9 100644
--- a/drivers/mmc/host/sdhci-pci-core.c
+++ b/drivers/mmc/host/sdhci-pci-core.c
@@ -1749,6 +1749,8 @@ static int amd_probe(struct sdhci_pci_chip *chip)
}
}
+ pci_dev_put(smbus_dev);
+
if (gen == AMD_CHIPSET_BEFORE_ML || gen == AMD_CHIPSET_CZ)
chip->quirks2 |= SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD;
--
2.35.3