diff mbox series

[6/9] mmc: rtsx_usb_sdmmc: fix return value check of mmc_add_host()

Message ID 20221101063023.1664968-7-yangyingliang@huawei.com (mailing list archive)
State New, archived
Headers show
Series mmc: fix return value check of mmc_add_host() | expand

Commit Message

Yang Yingliang Nov. 1, 2022, 6:30 a.m. UTC 
mmc_add_host() may return error, if we ignore its return value, the memory
that allocated in mmc_alloc_host() will be leaked and it will lead a kernel
crash because of deleting not added device in the remove path.

So fix this by checking the return value and calling mmc_free_host() in the
error path, besides, led_classdev_unregister() and pm_runtime_disable() also
need be called.

Fixes: c7f6558d84af ("mmc: Add realtek USB sdmmc host driver")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
---
 drivers/mmc/host/rtsx_usb_sdmmc.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/mmc/host/rtsx_usb_sdmmc.c b/drivers/mmc/host/rtsx_usb_sdmmc.c
index 5798aee06653..2c650cd58693 100644
--- a/drivers/mmc/host/rtsx_usb_sdmmc.c
+++ b/drivers/mmc/host/rtsx_usb_sdmmc.c
@@ -1329,6 +1329,7 @@  static int rtsx_usb_sdmmc_drv_probe(struct platform_device *pdev)
 #ifdef RTSX_USB_USE_LEDS_CLASS
 	int err;
 #endif
+	int ret;
 
 	ucr = usb_get_intfdata(to_usb_interface(pdev->dev.parent));
 	if (!ucr)
@@ -1365,7 +1366,15 @@  static int rtsx_usb_sdmmc_drv_probe(struct platform_device *pdev)
 	INIT_WORK(&host->led_work, rtsx_usb_update_led);
 
 #endif
-	mmc_add_host(mmc);
+	ret = mmc_add_host(mmc);
+	if (ret) {
+#ifdef RTSX_USB_USE_LEDS_CLASS
+		led_classdev_unregister(&host->led);
+#endif
+		mmc_free_host(mmc);
+		pm_runtime_disable(&pdev->dev);
+		return ret;
+	}
 
 	return 0;
 }