Messages in this thread | | | Subject | Re: [PATCH] virtio-console: avoid DMA from vmalloc area | From | Xianting Tian <> | Date | Wed, 28 Jul 2021 17:10:35 +0800 |
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在 2021/7/28 下午5:01, Arnd Bergmann 写道: > 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. OK, thanks, I will submit the patch ASAP :) > > Arnd
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