From: Markus Elfring elfring@users.sourceforge.net Date: Mon, 1 May 2017 18:22:52 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit
The script “checkpatch.pl” pointed information out like the following.
Comparison to NULL could be written …
Thus fix the affected source code places.
Signed-off-by: Markus Elfring elfring@users.sourceforge.net --- drivers/gpu/drm/drm_dp_mst_topology.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c index bcc76f15f1ce..f46bf5101d14 100644 --- a/drivers/gpu/drm/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/drm_dp_mst_topology.c @@ -1405,13 +1405,12 @@ static int set_hdr_from_dst_qlock(struct drm_dp_sideband_msg_hdr *hdr, DRM_DEBUG_KMS("%s: failed to find slot\n", __func__); return -EAGAIN; } - if (mstb->tx_slots[0] == NULL && mstb->tx_slots[1] == NULL) { + if (!mstb->tx_slots[0] && !mstb->tx_slots[1]) { txmsg->seqno = mstb->last_seqno; mstb->last_seqno ^= 1; - } else if (mstb->tx_slots[0] == NULL) - txmsg->seqno = 0; - else - txmsg->seqno = 1; + } else { + txmsg->seqno = mstb->tx_slots[0] ? 1 : 0; + } mstb->tx_slots[txmsg->seqno] = txmsg; }
@@ -2044,7 +2043,7 @@ int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool ms
/* add initial branch device at LCT 1 */ mstb = drm_dp_add_mst_branch_device(1, NULL); - if (mstb == NULL) { + if (!mstb) { ret = -ENOMEM; goto out_unlock; }