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authorTakashi Iwai <tiwai@suse.de>2018-08-03 14:21:47 +0200
committerTakashi Iwai <tiwai@suse.de>2018-08-03 14:21:52 +0200
commit69152e528e2a91a1bf898cc923cb0eaea2c338ce (patch)
tree1035b83e040e9703466ddb04f5daea1ceb3e0f7d
parent43a53ad0ecd36e3b16d68947e360818d58fa4907 (diff)
drm/dp/mst: Fix off-by-one typo when dump payload table
(bsc#1051510). suse-commit: 5817baea8dc623df3a7a91b08e5091fa22f8b53e
-rw-r--r--drivers/gpu/drm/drm_dp_mst_topology.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 70dcfa58d3c2..09ac83add715 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -2936,12 +2936,14 @@ static void drm_dp_mst_dump_mstb(struct seq_file *m,
}
}
+#define DP_PAYLOAD_TABLE_SIZE 64
+
static bool dump_dp_payload_table(struct drm_dp_mst_topology_mgr *mgr,
char *buf)
{
int i;
- for (i = 0; i < 64; i += 16) {
+ for (i = 0; i < DP_PAYLOAD_TABLE_SIZE; i += 16) {
if (drm_dp_dpcd_read(mgr->aux,
DP_PAYLOAD_TABLE_UPDATE_STATUS + i,
&buf[i], 16) != 16)
@@ -3010,7 +3012,7 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
mutex_lock(&mgr->lock);
if (mgr->mst_primary) {
- u8 buf[64];
+ u8 buf[DP_PAYLOAD_TABLE_SIZE];
int ret;
ret = drm_dp_dpcd_read(mgr->aux, DP_DPCD_REV, buf, DP_RECEIVER_CAP_SIZE);
@@ -3028,8 +3030,7 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
seq_printf(m, " revision: hw: %x.%x sw: %x.%x\n",
buf[0x9] >> 4, buf[0x9] & 0xf, buf[0xa], buf[0xb]);
if (dump_dp_payload_table(mgr, buf))
- seq_printf(m, "payload table: %*ph\n", 63, buf);
-
+ seq_printf(m, "payload table: %*ph\n", DP_PAYLOAD_TABLE_SIZE, buf);
}
mutex_unlock(&mgr->lock);