On Mon, Jul 26, 2021 at 09:11:30AM +0000, Schmid, Carsten wrote: > From 804d2db49c8db94ff4652f13826a2c74dac33941 Mon Sep 17 00:00:00 2001 > From: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx> > Date: Fri, 29 Jan 2021 15:00:22 +0200 > Subject: [PATCH] xhci: add xhci_get_virt_ep() helper > > [commit b1adc42d440df3233255e313a45ab7e9b2b74096 upstream] > > In several event handlers we need to find the right endpoint > structure from slot_id and ep_index in the event. > > Add a helper for this, check that slot_id and ep_index are valid. > > Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx> > Link: https://lore.kernel.org/r/20210129130044.206855-6-mathias.nyman@xxxxxxxxxxxxxxx > Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > Signed-off-by: Carsten Schmid <carsten_schmid@xxxxxxxxxx> > --- > Rationale: > From mail thread " Possible race in 4.14 xhci stack" > Searched for fix that Mathias Nyman mentioned. > Fix didn't apply on 4.14 directly, needed some small adaption. > Result provided here. > @Greg: Patch is for 4.14, not tested if applies on other kernels. I can not just apply this to 4.14, it also needs to go into 4.19 and 5.4 and 5.10 as you can not upgrade to a newer kernel and get a regression, right? Can you also provide patches for those kernels as well so that I can take this one? And also, you forgot to cc: the stable@xxxxxxxxxxxxxxx mailing list :( thanks, greg k-h
