Daniel Stone <[email protected]> writes: > The commit to rework the headroom check in start_xmit() now calls > pxskb_expand_head() unconditionally if the header is CoW. Unfortunately, > it does so with the delta between the extant headroom and the header > length, which may be negative if there is already sufficient headroom. > > pskb_expand_head() does allow for size being 0, in which case it just > copies, so clamp the header delta to zero. > > Opening Chrome (and all my tabs) on a PCIE device was enough to reliably > hit this. > > Fixes: 270a6c1f65fe ("brcmfmac: rework headroom check in .start_xmit()") > Signed-off-by: Daniel Stone <[email protected]> > Cc: Arend Van Spriel <[email protected]> > Cc: James Hughes <[email protected]> > Cc: Hante Meuleman <[email protected]> > Cc: Pieter-Paul Giesberts <[email protected]> > Cc: Franky Lin <[email protected]>
I'll queue this for 4.13. -- Kalle Valo
