linux-kernel - [PATCH 4.19 085/280] mailbox: bcm-flexrm-mailbox: Fix FlexRM ring flush timeout issue

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Date:   Fri, 22 Mar 2019 12:13:58 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Rayagonda Kokatanur <rayagonda.kokatanur@...adcom.com>,
        Ray Jui <ray.jui@...adcom.com>,
        Scott Branden <scott.branden@...adcom.com>,
        Jassi Brar <jaswinder.singh@...aro.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 085/280] mailbox: bcm-flexrm-mailbox: Fix FlexRM ring flush timeout issue

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

[ Upstream commit d7bf31a0f85faaf63c63c39d55154825a1eaaea9 ]

RING_CONTROL reg was not written due to wrong address, hence all
the subsequent ring flush was timing out.

Fixes: a371c10ea4b3 ("mailbox: bcm-flexrm-mailbox: Fix FlexRM ring flush sequence")

Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@...adcom.com>
Signed-off-by: Ray Jui <ray.jui@...adcom.com>
Reviewed-by: Scott Branden <scott.branden@...adcom.com>
Signed-off-by: Jassi Brar <jaswinder.singh@...aro.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/mailbox/bcm-flexrm-mailbox.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mailbox/bcm-flexrm-mailbox.c b/drivers/mailbox/bcm-flexrm-mailbox.c
index 8ab077ff58f4..96bcabfebc23 100644
--- a/drivers/mailbox/bcm-flexrm-mailbox.c
+++ b/drivers/mailbox/bcm-flexrm-mailbox.c
@@ -1396,9 +1396,9 @@ static void flexrm_shutdown(struct mbox_chan *chan)
 
 	/* Clear ring flush state */
 	timeout = 1000; /* timeout of 1s */
-	writel_relaxed(0x0, ring + RING_CONTROL);
+	writel_relaxed(0x0, ring->regs + RING_CONTROL);
 	do {
-		if (!(readl_relaxed(ring + RING_FLUSH_DONE) &
+		if (!(readl_relaxed(ring->regs + RING_FLUSH_DONE) &
 		      FLUSH_DONE_MASK))
 			break;
 		mdelay(1);
-- 
2.19.1