diff mbox series

[v2,2/2] usb: cdns3: fix incorrect calculation of ep_buf_size when more than one config

Message ID 20230707230015.494999-2-Frank.Li@nxp.com
State New
Headers show
Series [v2,1/2] usb: gadget: call usb_gadget_check_config() to verify UDC capability | expand

Commit Message

Frank Li July 7, 2023, 11 p.m. UTC 
Previously, the cdns3_gadget_check_config() function in the cdns3 driver
mistakenly calculated the ep_buf_size by considering only one
configuration's endpoint information because "claimed" will be clear after
call usb_gadget_check_config().

The fix involves checking the private flags EP_CLAIMED instead of relying
on the "claimed" flag.

Fixes: dce49449e04f ("usb: cdns3: allocate TX FIFO size according to composite EP number")
Reported-by: Ravi Gunasekaran <r-gunasekaran@ti.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
 drivers/usb/cdns3/cdns3-gadget.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Comments

Greg KH July 9, 2023, 8:06 a.m. UTC | #1 
On Sat, Jul 08, 2023 at 05:18:38PM +0200, Markus Elfring wrote:
> …
> > The fix involves checking the private flags EP_CLAIMED instead of relying
> > on the "claimed" flag.
> …
> 
> Please choose an imperative change suggestion.

Please do not review USB kernel patches, the comments you make are not
helpful for developers and will be ignored.

greg k-h
Ravi Gunasekaran July 10, 2023, 11:14 a.m. UTC | #2 
On 7/8/23 4:30 AM, Frank Li wrote:
> Previously, the cdns3_gadget_check_config() function in the cdns3 driver
> mistakenly calculated the ep_buf_size by considering only one
> configuration's endpoint information because "claimed" will be clear after
> call usb_gadget_check_config().
> 
> The fix involves checking the private flags EP_CLAIMED instead of relying
> on the "claimed" flag.
> 
> Fixes: dce49449e04f ("usb: cdns3: allocate TX FIFO size according to composite EP number")
> Reported-by: Ravi Gunasekaran <r-gunasekaran@ti.com>
> Signed-off-by: Frank Li <Frank.Li@nxp.com>
> ---
>  drivers/usb/cdns3/cdns3-gadget.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/cdns3/cdns3-gadget.c b/drivers/usb/cdns3/cdns3-gadget.c
> index ccfaebca6faa..3326955f6991 100644
> --- a/drivers/usb/cdns3/cdns3-gadget.c
> +++ b/drivers/usb/cdns3/cdns3-gadget.c
> @@ -2999,12 +2999,14 @@ static int cdns3_gadget_udc_stop(struct usb_gadget *gadget)
>  static int cdns3_gadget_check_config(struct usb_gadget *gadget)
>  {
>  	struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
> +	struct cdns3_endpoint *priv_ep;
>  	struct usb_ep *ep;
>  	int n_in = 0;
>  	int total;
>  
>  	list_for_each_entry(ep, &gadget->ep_list, ep_list) {
> -		if (ep->claimed && (ep->address & USB_DIR_IN))
> +		priv_ep = ep_to_cdns3_ep(ep);
> +		if ((priv_ep->flags & EP_CLAIMED) && (ep->address & USB_DIR_IN))
>  			n_in++;
>  	}
>  

Tested-by: Ravi Gunasekaran <r-gunasekaran@ti.com>
diff mbox series

Patch

diff --git a/drivers/usb/cdns3/cdns3-gadget.c b/drivers/usb/cdns3/cdns3-gadget.c
index ccfaebca6faa..3326955f6991 100644
--- a/drivers/usb/cdns3/cdns3-gadget.c
+++ b/drivers/usb/cdns3/cdns3-gadget.c
@@ -2999,12 +2999,14 @@  static int cdns3_gadget_udc_stop(struct usb_gadget *gadget)
 static int cdns3_gadget_check_config(struct usb_gadget *gadget)
 {
 	struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget);
+	struct cdns3_endpoint *priv_ep;
 	struct usb_ep *ep;
 	int n_in = 0;
 	int total;
 
 	list_for_each_entry(ep, &gadget->ep_list, ep_list) {
-		if (ep->claimed && (ep->address & USB_DIR_IN))
+		priv_ep = ep_to_cdns3_ep(ep);
+		if ((priv_ep->flags & EP_CLAIMED) && (ep->address & USB_DIR_IN))
 			n_in++;
 	}