> -----Original Message----- > From: Andrew Shadura [mailto:andrew.shadura at collabora.co.uk] > Sent: Thursday, November 03, 2016 12:42 PM > To: Deucher, Alexander; linux-kernel at vger.kernel.org; dri- > devel at lists.freedesktop.org; Koenig, Christian; David Airlie > Cc: Zhu, Rex; Jammy Zhou > Subject: Re: [PATCH] drm/amd/powerplay: return false instead of -EINVAL > > On 03/11/16 17:39, Deucher, Alexander wrote: > >> Returning -EINVAL from a bool-returning function > >> phm_check_smc_update_required_for_display_configuration has an > >> unexpected > >> effect of returning true, which is probably not what was intended. > >> Replace -EINVAL by false. > >> > >> The only place this function is called from is > >> psm_adjust_power_state_dynamic in > >> drivers/gpu/drm/amd/powerplay/eventmgr/psm.c:106: > >> > >> if (!equal || > >> phm_check_smc_update_required_for_display_configuration(hwmgr)) { > >> phm_apply_state_adjust_rules(hwmgr, requested, > >> pcurrent); > >> phm_set_power_state(hwmgr, &pcurrent->hardware, > >> &requested->hardware); > >> hwmgr->current_ps = requested; > >> } > >> > >> It seems to expect a boolean value here. > >> > >> This issue has been found using the following Coccinelle semantic patch > >> written by Peter Senna Tschudin: > >> <smpl> > >> @@ > >> identifier f; > >> constant C; > >> typedef bool; > >> @@ > >> bool f (...){ > >> <+... > >> * return -C; > >> ...+> > >> } > >> </smpl> > >> > >> Signed-off-by: Andrew Shadura <andrew.shadura at collabora.co.uk> > > > > Reviewed-by: Alex Deucher <alexander.deucher at amd.com> > > > > I'll pick this up shortly. Thanks! > > Great, thanks! I wonder who should I prod for this one: > https://patchwork.kernel.org/patch/7206081/
PowerPC developers? Alex > > -- > Cheers, > Andrew
