linux-kernel - [RESEND PATCH] ACPI: CPPC: Support PCC with interrupt flag

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Message-Id: <1473875698-12402-1-git-send-email-hotran@apm.com>
Date:   Wed, 14 Sep 2016 10:54:58 -0700
From:   Hoan Tran <hotran@....com>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>, pprakash@...eaurora.org,
        Ashwin Chaugule <ashwin.chaugule@...aro.org>
Cc:     linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        lho@....com, Duc Dang <dhdang@....com>, Hoan Tran <hotran@....com>
Subject: [RESEND PATCH] ACPI: CPPC: Support PCC with interrupt flag

For PCC mailbox with interrupt flag, CPPC should call mbox_chan_txdone()
function to notify the mailbox framework about TX completion.

Signed-off-by: Hoan Tran <hotran@....com>
Reviewed-by: Prashanth Prakash <pprakash@...eaurora.org>
---
 drivers/acpi/cppc_acpi.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c
index 3d1ae6d..d0d0504 100644
--- a/drivers/acpi/cppc_acpi.c
+++ b/drivers/acpi/cppc_acpi.c
@@ -311,7 +311,10 @@ static int send_pcc_cmd(u16 cmd)
 	if (pcc_data.pcc_mrtt)
 		last_cmd_cmpl_time = ktime_get();
 
-	mbox_client_txdone(pcc_data.pcc_channel, ret);
+	if (pcc_data.pcc_channel->mbox->txdone_irq)
+		mbox_chan_txdone(pcc_data.pcc_channel, ret);
+	else
+		mbox_client_txdone(pcc_data.pcc_channel, ret);
 
 end:
 	if (cmd == CMD_WRITE) {
-- 
1.9.1