On Fri, Jun 21, 2024, Greg KH wrote: > On Fri, Jun 21, 2024 at 09:40:10AM +0800, joswang wrote: > > On Fri, Jun 21, 2024 at 1:16 AM Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > > > > > On Wed, Jun 19, 2024 at 07:45:29PM +0800, joswang wrote: > > > > From: Jos Wang <joswang@xxxxxxxxxx> > > > > > > > > This is a workaround for STAR 4846132, which only affects > > > > DWC_usb31 version2.00a operating in host mode. > > > > > > > > There is a problem in DWC_usb31 version 2.00a operating > > > > in host mode that would cause a CSR read timeout When CSR > > > > read coincides with RAM Clock Gating Entry. By disable > > > > Clock Gating, sacrificing power consumption for normal > > > > operation. > > > > > > > > Cc: stable@xxxxxxxxxxxxxxx > > > > Signed-off-by: Jos Wang <joswang@xxxxxxxxxx> > > > > > > What commit id does this fix? How far back should it be backported in > > > the stable releases? > > > > > > thanks, > > > > > > greg k-h > > > > Hello Greg Thinh > > > > It seems first begin from the commit 1e43c86d84fb ("usb: dwc3: core: > > Add DWC31 version 2.00a controller") > > in 6.8.0-rc6 branch ? > > That commit showed up in 6.9, not 6.8. And if so, please resend with a > proper "Fixes:" tag. > This patch workarounds the controller's issue. It doesn't resolve any particular commit that requires a "Fixes" tag. So, this should go on "next". It can be backported as needed. If it's to be backported, it can probably go back to as far as v4.3, to commit 690fb3718a70 ("usb: dwc3: Support Synopsys USB 3.1 IP"). But you'd need to collect all the dependencies including the commit mention above. BR, Thinh