From: Xiaoke Wang <xkernel.wang@xxxxxxxxxxx> [ Upstream commit 06bfdb6d889f57fe9ce7bd139ce278b68f3a59de ] In rtw_init_cmd_priv(), if `pcmdpriv->rsp_allocated_buf` is allocated in failure, then `pcmdpriv->cmd_allocated_buf` will not be properly released. Besides, considering there are only two error paths and the first one can directly return, we do not need to implicitly jump to the `exit` tag to execute the error handling code. So this patch added `kfree(pcmdpriv->cmd_allocated_buf);` on the error path to release the resource and simplified the return logic of rtw_init_cmd_priv(). As there is no proper device to test with, no runtime testing was performed. Tested-by: Philipp Hortmann <philipp.g.hortmann@xxxxxxxxx> # Edimax N150 Signed-off-by: Xiaoke Wang <xkernel.wang@xxxxxxxxxxx> Link: https://lore.kernel.org/r/tencent_1B6AAE10471D4556788892F8FF3E4812F306@xxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/staging/r8188eu/core/rtw_cmd.c | 15 +++++---------- 1 file changed, 5 insertions(+), 10 deletions(-) diff --git a/drivers/staging/r8188eu/core/rtw_cmd.c b/drivers/staging/r8188eu/core/rtw_cmd.c index 5b6a891b5d67..5eb1751a43ac 100644 --- a/drivers/staging/r8188eu/core/rtw_cmd.c +++ b/drivers/staging/r8188eu/core/rtw_cmd.c @@ -58,8 +58,6 @@ static int _rtw_enqueue_cmd(struct __queue *queue, struct cmd_obj *obj) u32 rtw_init_cmd_priv(struct cmd_priv *pcmdpriv) { - u32 res = _SUCCESS; - init_completion(&pcmdpriv->enqueue_cmd); /* sema_init(&(pcmdpriv->cmd_done_sema), 0); */ init_completion(&pcmdpriv->start_cmd_thread); @@ -74,27 +72,24 @@ u32 rtw_init_cmd_priv(struct cmd_priv *pcmdpriv) pcmdpriv->cmd_allocated_buf = kzalloc(MAX_CMDSZ + CMDBUFF_ALIGN_SZ, GFP_KERNEL); - if (!pcmdpriv->cmd_allocated_buf) { - res = _FAIL; - goto exit; - } + if (!pcmdpriv->cmd_allocated_buf) + return _FAIL; pcmdpriv->cmd_buf = pcmdpriv->cmd_allocated_buf + CMDBUFF_ALIGN_SZ - ((size_t)(pcmdpriv->cmd_allocated_buf) & (CMDBUFF_ALIGN_SZ - 1)); pcmdpriv->rsp_allocated_buf = kzalloc(MAX_RSPSZ + 4, GFP_KERNEL); if (!pcmdpriv->rsp_allocated_buf) { - res = _FAIL; - goto exit; + kfree(pcmdpriv->cmd_allocated_buf); + return _FAIL; } pcmdpriv->rsp_buf = pcmdpriv->rsp_allocated_buf + 4 - ((size_t)(pcmdpriv->rsp_allocated_buf) & 3); pcmdpriv->cmd_done_cnt = 0; pcmdpriv->rsp_cnt = 0; -exit: - return res; + return _SUCCESS; } u32 rtw_init_evt_priv(struct evt_priv *pevtpriv) -- 2.35.1
