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Subject[PATCH 4.14 049/183] mailbox: bcm-flexrm-mailbox: Fix FlexRM ring flush timeout issue
Date
4.14-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@broadcom.com>
Signed-off-by: Ray Jui <ray.jui@broadcom.com>
Reviewed-by: Scott Branden <scott.branden@broadcom.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.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 f052a3eb2098..7e3ed2714630 100644
--- a/drivers/mailbox/bcm-flexrm-mailbox.c
+++ b/drivers/mailbox/bcm-flexrm-mailbox.c
@@ -1381,9 +1381,9 @@ 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


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