[PATCH 11/16] coresight: etm4x: Fix issues on trcseqevr access

[Mathieu Poirier]

From: Jonathan Zhou <jonathan.zhouwen@xxxxxxxxxx>

The TRCSEQEVR(3) is reserved, using '@nrseqstate - 1' instead to avoid
accessing the reserved register.

Cc: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
Cc: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
Cc: Mike Leach <mike.leach@xxxxxxxxxx>
Cc: Shaokun Zhang <zhangshaokun@xxxxxxxxxxxxx>
Cc: lizixian@xxxxxxxxxxxxx
Fixes: f188b5e76aae ("coresight: etm4x: Save/restore state across CPU low power states")
Signed-off-by: Jonathan Zhou <jonathan.zhouwen@xxxxxxxxxx>
[Fixed capital letter in title]
Signed-off-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
---
 drivers/hwtracing/coresight/coresight-etm4x.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c
index 63cb1e0d5953..b29ad4f7fac2 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x.c
@@ -1193,7 +1193,7 @@ static int etm4_cpu_save(struct etmv4_drvdata *drvdata)
 	state->trcvdsacctlr = readl(drvdata->base + TRCVDSACCTLR);
 	state->trcvdarcctlr = readl(drvdata->base + TRCVDARCCTLR);
 
-	for (i = 0; i < drvdata->nrseqstate; i++)
+	for (i = 0; i < drvdata->nrseqstate - 1; i++)
 		state->trcseqevr[i] = readl(drvdata->base + TRCSEQEVRn(i));
 
 	state->trcseqrstevr = readl(drvdata->base + TRCSEQRSTEVR);
@@ -1298,7 +1298,7 @@ static void etm4_cpu_restore(struct etmv4_drvdata *drvdata)
 	writel_relaxed(state->trcvdsacctlr, drvdata->base + TRCVDSACCTLR);
 	writel_relaxed(state->trcvdarcctlr, drvdata->base + TRCVDARCCTLR);
 
-	for (i = 0; i < drvdata->nrseqstate; i++)
+	for (i = 0; i < drvdata->nrseqstate - 1; i++)
 		writel_relaxed(state->trcseqevr[i],
 			       drvdata->base + TRCSEQEVRn(i));
 
-- 
2.25.1