From: crwulff@gmail.com
To: linux-usb@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
Felipe Balbi <felipe.balbi@linux.intel.com>,
Ruslan Bilovol <ruslan.bilovol@gmail.com>,
Jerome Brunet <jbrunet@baylibre.com>,
linux-kernel@vger.kernel.org, Chris Wulff <crwulff@gmail.com>,
stable@vger.kernel.org
Subject: [PATCH] usb: gadget: u_audio: Check return codes from usb_ep_enable and config_ep_by_speed.
Date: Sun, 21 Jul 2024 15:23:15 -0400 [thread overview]
Message-ID: <20240721192314.3532697-2-crwulff@gmail.com> (raw)
From: Chris Wulff <crwulff@gmail.com>
These functions can fail if descriptors are malformed, or missing,
for the selected USB speed.
Fixes: eb9fecb9e69b ("usb: gadget: f_uac2: split out audio core")
Fixes: 24f779dac8f3 ("usb: gadget: f_uac2/u_audio: add feedback endpoint support")
Cc: stable@vger.kernel.org
Signed-off-by: Chris Wulff <crwulff@gmail.com>
---
drivers/usb/gadget/function/u_audio.c | 42 ++++++++++++++++++++++-----
1 file changed, 34 insertions(+), 8 deletions(-)
diff --git a/drivers/usb/gadget/function/u_audio.c b/drivers/usb/gadget/function/u_audio.c
index 89af0feb7512..24299576972f 100644
--- a/drivers/usb/gadget/function/u_audio.c
+++ b/drivers/usb/gadget/function/u_audio.c
@@ -592,16 +592,25 @@ int u_audio_start_capture(struct g_audio *audio_dev)
struct usb_ep *ep, *ep_fback;
struct uac_rtd_params *prm;
struct uac_params *params = &audio_dev->params;
- int req_len, i;
+ int req_len, i, ret;
prm = &uac->c_prm;
dev_dbg(dev, "start capture with rate %d\n", prm->srate);
ep = audio_dev->out_ep;
- config_ep_by_speed(gadget, &audio_dev->func, ep);
+ ret = config_ep_by_speed(gadget, &audio_dev->func, ep);
+ if (ret < 0) {
+ dev_err(dev, "config_ep_by_speed for out_ep failed (%d)\n", ret);
+ return ret;
+ }
+
req_len = ep->maxpacket;
prm->ep_enabled = true;
- usb_ep_enable(ep);
+ ret = usb_ep_enable(ep);
+ if (ret < 0) {
+ dev_err(dev, "usb_ep_enable failed for out_ep (%d)\n", ret);
+ return ret;
+ }
for (i = 0; i < params->req_number; i++) {
if (!prm->reqs[i]) {
@@ -629,9 +638,18 @@ int u_audio_start_capture(struct g_audio *audio_dev)
return 0;
/* Setup feedback endpoint */
- config_ep_by_speed(gadget, &audio_dev->func, ep_fback);
+ ret = config_ep_by_speed(gadget, &audio_dev->func, ep_fback);
+ if (ret < 0) {
+ dev_err(dev, "config_ep_by_speed in_ep_fback failed (%d)\n", ret);
+ return ret; // TODO: Clean up out_ep
+ }
+
prm->fb_ep_enabled = true;
- usb_ep_enable(ep_fback);
+ ret = usb_ep_enable(ep_fback);
+ if (ret < 0) {
+ dev_err(dev, "usb_ep_enable failed for in_ep_fback (%d)\n", ret);
+ return ret; // TODO: Clean up out_ep
+ }
req_len = ep_fback->maxpacket;
req_fback = usb_ep_alloc_request(ep_fback, GFP_ATOMIC);
@@ -687,13 +705,17 @@ int u_audio_start_playback(struct g_audio *audio_dev)
struct uac_params *params = &audio_dev->params;
unsigned int factor;
const struct usb_endpoint_descriptor *ep_desc;
- int req_len, i;
+ int req_len, i, ret;
unsigned int p_pktsize;
prm = &uac->p_prm;
dev_dbg(dev, "start playback with rate %d\n", prm->srate);
ep = audio_dev->in_ep;
- config_ep_by_speed(gadget, &audio_dev->func, ep);
+ ret = config_ep_by_speed(gadget, &audio_dev->func, ep);
+ if (ret < 0) {
+ dev_err(dev, "config_ep_by_speed for in_ep failed (%d)\n", ret);
+ return ret;
+ }
ep_desc = ep->desc;
/*
@@ -720,7 +742,11 @@ int u_audio_start_playback(struct g_audio *audio_dev)
uac->p_residue_mil = 0;
prm->ep_enabled = true;
- usb_ep_enable(ep);
+ ret = usb_ep_enable(ep);
+ if (ret < 0) {
+ dev_err(dev, "usb_ep_enable failed for in_ep (%d)\n", ret);
+ return ret;
+ }
for (i = 0; i < params->req_number; i++) {
if (!prm->reqs[i]) {
--
2.43.0
reply other threads:[~2024-07-21 19:24 UTC|newest]
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