Re: [PATCH 1/2] xhci: make sure TRB is fully written before giving it to the... | linux-usb | Ratatoskr

[PATCH 0/2] xhci fixes for usb-linus · Mathias Nyman <hidden> · 2021-01-15
[PATCH 1/2] xhci: make sure TRB is fully written before giving it to the controller · Mathias Nyman <hidden> · 2021-01-15
Re: [PATCH 1/2] xhci: make sure TRB is fully written before giving it to the controller · Sergei Shtylyov <hidden> · 2021-01-15
RE: [PATCH 1/2] xhci: make sure TRB is fully written before giving it to the controller · David Laight <hidden> · 2021-01-15
Re: [PATCH 1/2] xhci: make sure TRB is fully written before giving it to the controller · Sergei Shtylyov <hidden> · 2021-01-15
Re: [PATCH 1/2] xhci: make sure TRB is fully written before giving it to the controller · Mathias Nyman <hidden> · 2021-01-18
Re: [PATCH 1/2] xhci: make sure TRB is fully written before giving it to the controller · Ross Zwisler <hidden> · 2021-01-19
[PATCH 2/2] xhci: tegra: Delay for disabling LFPS detector · Mathias Nyman <hidden> · 2021-01-15

Re: [PATCH 1/2] xhci: make sure TRB is fully written before giving it to the controller

From: Ross Zwisler <hidden>
Date: 2021-01-19 23:27:24
Also in: stable

On Mon, Jan 18, 2021 at 5:05 AM Mathias Nyman
[off-list ref] wrote:
<>

True, good point, dma_wmb() should be enough here.
In fact most other wmb()s in xhci could be turned into dma_wmb().

FWIW I've confirmed in my testing that dma_wmb() does indeed also
solve the problem.