[PATCH] firmware: imx: dsp: fix mailbox channel leak on kasprintf failure

[Linkai Gong]

If kasprintf() fails while setting up mailbox channels, already
requested channels from earlier iterations were never freed. Route
the failure through the existing cleanup path.

Fixes: ffbf23d50353 ("firmware: imx: Add DSP IPC protocol interface")
Signed-off-by: Linkai Gong <gonglinkai at kylinos.cn>
---
 drivers/firmware/imx/imx-dsp.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/firmware/imx/imx-dsp.c b/drivers/firmware/imx/imx-dsp.c
index ed79e823157a..7e3f45ddf0c1 100644
--- a/drivers/firmware/imx/imx-dsp.c
+++ b/drivers/firmware/imx/imx-dsp.c
@@ -99,8 +99,10 @@ static int imx_dsp_setup_channels(struct imx_dsp_ipc *dsp_ipc)
 		else
 			chan_name = kasprintf(GFP_KERNEL, "rxdb%d", i - 2);
 
-		if (!chan_name)
-			return -ENOMEM;
+		if (!chan_name) {
+			ret = -ENOMEM;
+			goto out;
+		}
 
 		dsp_chan = &dsp_ipc->chans[i];
 		dsp_chan->name = chan_name;
-- 
2.25.1