@@ -741,15 +741,19 @@ static int brcmf_usb_dl_cmd(struct brcmf_usbdev_info *devinfo, u8 cmd,
void *buffer, int buflen)
{
int ret;
- char *tmpbuf;
+ char *tmpbuf = NULL;
u16 size;
- if ((!devinfo) || (devinfo->ctl_urb == NULL))
- return -EINVAL;
+ if (!devinfo || !devinfo->ctl_urb) {
+ ret = -EINVAL;
+ goto err;
+ }
tmpbuf = kmalloc(buflen, GFP_ATOMIC);
- if (!tmpbuf)
- return -ENOMEM;
+ if (!tmpbuf) {
+ ret = -ENOMEM;
+ goto err;
+ }
size = buflen;
devinfo->ctl_urb->transfer_buffer_length = size;
@@ -770,18 +774,23 @@ static int brcmf_usb_dl_cmd(struct brcmf_usbdev_info *devinfo, u8 cmd,
ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC);
if (ret < 0) {
brcmf_err("usb_submit_urb failed %d\n", ret);
- goto finalize;
+ goto err;
}
if (!brcmf_usb_ioctl_resp_wait(devinfo)) {
usb_kill_urb(devinfo->ctl_urb);
ret = -ETIMEDOUT;
+ goto err;
} else {
memcpy(buffer, tmpbuf, buflen);
}
-finalize:
kfree(tmpbuf);
+ return 0;
+
+err:
+ kfree(tmpbuf);
+ brcmf_err("dl cmd %u failed: err=%d\n", cmd, ret);
return ret;
}
In brcmf_usb_dl_cmd(), the error logging is not enough to describe the error state. And some caller of the brcmf_usb_dl_cmd() does not handle its error. An error log in brcmf_usb_dl_cmd() is needed to prevent silent failure. Add error handling in brcmf_usb_dl_cmd() to log the command id and error code in the brcmf_usb_dl_cmd() fails. In this way, every invocation of the function logs a message upon failure. Signed-off-by: Wentao Liang <vulab@iscas.ac.cn> --- v5: Remove finalize label. v4: Fix spelling problem. v3: Change patch name and comment. Move error log into brcmf_usb_dl_cmd(). v2: Remove redundant bailing out code. .../broadcom/brcm80211/brcmfmac/usb.c | 23 +++++++++++++------ 1 file changed, 16 insertions(+), 7 deletions(-)