[PATCH] staging: rtl8723bs: disable SDIO function on block size failure

[Myeonghun Pak]

sdio_init() enables the SDIO function before configuring the block
size. If sdio_set_block_size() fails, the function jumps to the release
path and returns the error without disabling the SDIO function. The
caller then frees the dvobj directly, so the enabled SDIO function is
left active on that probe failure path.

Disable the SDIO function before releasing the host when block size
configuration fails.

This issue was identified during our ongoing static-analysis research while
reviewing kernel code.

Fixes: 554c0a3abf21 ("staging: Add rtl8723bs sdio wifi driver")
Co-developed-by: Ijae Kim <ae878000@xxxxxxxxx>
Signed-off-by: Ijae Kim <ae878000@xxxxxxxxx>
Signed-off-by: Myeonghun Pak <mhun512@xxxxxxxxx>
---
 drivers/staging/rtl8723bs/os_dep/sdio_intf.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/rtl8723bs/os_dep/sdio_intf.c b/drivers/staging/rtl8723bs/os_dep/sdio_intf.c
index c43a0391a5ca..47e87aaf76e2 100644
--- a/drivers/staging/rtl8723bs/os_dep/sdio_intf.c
+++ b/drivers/staging/rtl8723bs/os_dep/sdio_intf.c
@@ -122,8 +122,10 @@ static u32 sdio_init(struct dvobj_priv *dvobj)
 		goto release;
 
 	err = sdio_set_block_size(func, 512);
-	if (err)
+	if (err) {
+		sdio_disable_func(func);
 		goto release;
+	}
 
 	psdio_data->block_transfer_len = 512;
 	psdio_data->tx_block_mode = 1;
-- 
2.47.1