[PATCH v3 1/2] tty: hvc: pass DMA capable memory to put_chars()

[Greg KH]

On Thu, Aug 05, 2021 at 04:08:46PM +0800, Xianting Tian wrote:
> 
> 在 2021/8/5 下午3:58, Jiri Slaby 写道:
> > Hi,
> > 
> > On 04. 08. 21, 4:54, Xianting Tian wrote:
> > > @@ -933,6 +949,16 @@ struct hvc_struct *hvc_alloc(uint32_t vtermno,
> > > int data,
> > >       hp->outbuf_size = outbuf_size;
> > >       hp->outbuf = &((char *)hp)[ALIGN(sizeof(*hp), sizeof(long))];
> > >   +    /*
> > > +     * hvc_con_outbuf is guaranteed to be aligned at least to the
> > > +     * size(N_OUTBUF) by kmalloc().
> > > +     */
> > > +    hp->hvc_con_outbuf = kzalloc(N_OUTBUF, GFP_KERNEL);
> > > +    if (!hp->hvc_con_outbuf)
> > > +        return ERR_PTR(-ENOMEM);
> > 
> > This leaks hp, right?
> > 
> > BTW your 2 patches are still not threaded, that is hard to follow.
> 
> yes, thanks, I found the bug, I am preparing to do this in v4.
> 
> It is the first time I send series patches(number >1), I checked the method
> for sending series patch on LKML.org, I should send '0/2' which is the
> history info for series patches.

Please use 'git send-email' to send the full series all at once,
otherwise it is hard to make the emails threaded "by hand" if you do not
do so.

thanks,

greg k-h