Messages in this thread | | | From | Arnd Bergmann <> | Date | Wed, 28 Jul 2021 11:01:17 +0200 | Subject | Re: [PATCH] virtio-console: avoid DMA from vmalloc area |
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On Wed, Jul 28, 2021 at 10:28 AM Xianting Tian <xianting.tian@linux.alibaba.com> wrote: > 在 2021/7/28 下午3:25, Arnd Bergmann 写道: > > I checked several hvc backends, like drivers/tty/hvc/hvc_riscv_sbi.c, > drivers/tty/hvc/hvc_iucv.c, drivers/tty/hvc/hvc_rtas.c, they don't use dma. > > I not finished all hvc backends check yet. But I think even if all hvc > backends don't use dma currently, it is still possible that the hvc > backend using dma will be added in the furture. > > So I agree with you it should better be fixed in the hvc framework, > solve the issue in the first place.
Ok, sounds good to me, no need to check more backends then. I see the hvc-console driver is listed as 'Odd Fixes' in the maintainer list, with nobody assigned other than the ppc kernel list (added to Cc).
Once you come up with a fix in hvc_console.c, please send that to the tty maintainers, the ppc list and me, and I'll review it.
Arnd
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