linux-kernel - [PATCH 1/3] remoteproc: k3-r5: Use IO memset to clear TCMs

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Message-ID: <20241021204557.929823-1-afd@ti.com>
Date: Mon, 21 Oct 2024 15:45:55 -0500
From: Andrew Davis <afd@...com>
To: Bjorn Andersson <andersson@...nel.org>,
        Mathieu Poirier
	<mathieu.poirier@...aro.org>,
        Hari Nagalla <hnagalla@...com>, Beleswar Padhi
	<b-padhi@...com>
CC: <linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Andrew
 Davis <afd@...com>
Subject: [PATCH 1/3] remoteproc: k3-r5: Use IO memset to clear TCMs

While it should be safe to use normal memset() on these memories as they
are mapped as Normal Non-Cached, using the memset_io() provides stronger
guarantees on access alignment and fixes a sparse check warning. Switch
to memset_io() here.

Signed-off-by: Andrew Davis <afd@...com>
---
 drivers/remoteproc/ti_k3_r5_remoteproc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/remoteproc/ti_k3_r5_remoteproc.c b/drivers/remoteproc/ti_k3_r5_remoteproc.c
index 2f996a962f557..e1fe85e5eba6a 100644
--- a/drivers/remoteproc/ti_k3_r5_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_r5_remoteproc.c
@@ -487,10 +487,10 @@ static int k3_r5_rproc_prepare(struct rproc *rproc)
 	 * can be effective on all TCM addresses.
 	 */
 	dev_dbg(dev, "zeroing out ATCM memory\n");
-	memset(core->mem[0].cpu_addr, 0x00, core->mem[0].size);
+	memset_io(core->mem[0].cpu_addr, 0x00, core->mem[0].size);
 
 	dev_dbg(dev, "zeroing out BTCM memory\n");
-	memset(core->mem[1].cpu_addr, 0x00, core->mem[1].size);
+	memset_io(core->mem[1].cpu_addr, 0x00, core->mem[1].size);
 
 	return 0;
 }
-- 
2.39.2