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Commit 227f66d2 authored by Ben Skeggs's avatar Ben Skeggs
Browse files

drm/nouveau/kms/nv50: fix oops during DP IRQ handling on non-MST boards 



Reported-by: default avatarWoody Suwalski <terraluna977@gmail.com>
Signed-off-by: default avatarBen Skeggs <bskeggs@redhat.com>
Cc: stable@vger.kernel.org
parent 194d68dd

drivers/gpu/drm/nouveau/nv50_display.c

+4 −1
Original line number Diff line number Diff line
@@ -3265,11 +3265,14 @@ nv50_mstm = { 
void

nv50_mstm_service(struct nv50_mstm *mstm)

{

	struct drm_dp_aux *aux = mstm->mgr.aux;

	struct drm_dp_aux *aux = mstm ? mstm->mgr.aux : NULL;

	bool handled = true;

	int ret;

	u8 esi[8] = {};



	if (!aux)

		return;



	while (handled) {

		ret = drm_dp_dpcd_read(aux, DP_SINK_COUNT_ESI, esi, 8);

		if (ret != 8) {