diff mbox

[3/6] etm: do a dummy read from OSSRR during initialization

Message ID 1272735501-2963-4-git-send-email-virtuoso@slind.org (mailing list archive)
State New, archived
Headers show

Commit Message

Alexander Shishkin May 1, 2010, 5:38 p.m. UTC 
None
diff mbox

Patch

diff --git a/arch/arm/kernel/etm.c b/arch/arm/kernel/etm.c
index d08062b..73b824a 100644
--- a/arch/arm/kernel/etm.c
+++ b/arch/arm/kernel/etm.c
@@ -558,7 +558,9 @@  static int __init etm_probe(struct amba_device *dev, struct amba_id *id)
 	t->etm_portsz = 1;
 
 	etm_unlock(t);
-	ret = etm_readl(t, ETMMR_PDSR);
+	(void)etm_readl(t, ETMMR_PDSR);
+	/* dummy first read */
+	(void)etm_readl(&tracer, ETMMR_OSSRR);
 
 	t->ncmppairs = etm_readl(t, ETMR_CONFCODE) & 0xf;
 	etm_writel(t, 0x440, ETMR_CTRL);