* Re: [PATCH] virtio-console: avoid DMA from vmalloc area [not found] ` <0d03a42b-b46c-408f-17a4-b6c094c0c29e@linux.alibaba.com> @ 2021-07-28 9:01 ` Arnd Bergmann 2021-07-28 9:10 ` Xianting Tian 0 siblings, 1 reply; 2+ messages in thread From: Arnd Bergmann @ 2021-07-28 9:01 UTC (permalink / raw) To: Xianting Tian Cc: Arnd Bergmann, Amit Shah, gregkh, Linux Kernel Mailing List, open list:DRM DRIVER FOR QEMU'S CIRRUS DEVICE, linuxppc-dev, Omar Sandoval 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 ^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] virtio-console: avoid DMA from vmalloc area 2021-07-28 9:01 ` [PATCH] virtio-console: avoid DMA from vmalloc area Arnd Bergmann @ 2021-07-28 9:10 ` Xianting Tian 0 siblings, 0 replies; 2+ messages in thread From: Xianting Tian @ 2021-07-28 9:10 UTC (permalink / raw) To: Arnd Bergmann Cc: Amit Shah, gregkh, Linux Kernel Mailing List, open list:DRM DRIVER FOR QEMU'S CIRRUS DEVICE, linuxppc-dev, Omar Sandoval 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 ^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2021-07-28 11:10 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
[not found] <20210727131217.15092-1-xianting.tian@linux.alibaba.com>
[not found] ` <CAK8P3a15ykABd61Rad5iaZtGN=-+Guk0CNyCMK3XD7TgubG7hg@mail.gmail.com>
[not found] ` <be29127d-8cec-c7b8-ac96-4da94198dc03@linux.alibaba.com>
[not found] ` <CAK8P3a1O02Ho2dM3F+bUXf9Ze8uRKYzY5fFmRGpszUXg_nrH4w@mail.gmail.com>
[not found] ` <0d03a42b-b46c-408f-17a4-b6c094c0c29e@linux.alibaba.com>
2021-07-28 9:01 ` [PATCH] virtio-console: avoid DMA from vmalloc area Arnd Bergmann
2021-07-28 9:10 ` Xianting Tian
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox