Re: [PATCH] USB: hub: Delete an error message for a failed memory allocation in usb_hub_clear_tt_buffer()

Joe Perches
2017-12-06T20:05:21Z

On Wed, 2017-12-06 at 11:45 -0500, Alan Stern wrote:
> On Wed, 6 Dec 2017, SF Markus Elfring wrote:
> > Omit an extra message for a memory allocation failure in this function.

Markus' typical terrible commit message.

> > diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
[]
> > @@ -829,7 +829,6 @@ int usb_hub_clear_tt_buffer(struct urb *urb)
> > */
> > clear = kmalloc(sizeof *clear, GFP_ATOMIC);
> > if (clear == NULL) {
> > - dev_err(&udev->dev, "can't save CLEAR_TT_BUFFER state\n");
> > /* FIXME recover somehow ... RESET_TT? */
> > return -ENOMEM;
> > }
>
> Does the existing memory allocation error message include the
> &udev->dev device name and driver name? If it doesn't, there will be
> no way for the user to tell that the error message is related to the
> device failure.

No, but the effect is similar.

OOM does a dump_stack() so this function's call tree is shown.