linux-kernel - [PATCH v3 3/8] mailbox: mpfs: ditch a useless busy check

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Message-Id: <20230307202257.1762151-4-conor@kernel.org>
Date:   Tue,  7 Mar 2023 20:22:53 +0000
From:   Conor Dooley <conor@...nel.org>
To:     linux-riscv@...ts.infradead.org
Cc:     conor@...nel.org, Conor Dooley <conor.dooley@...rochip.com>,
        Daire McNamara <daire.mcnamara@...rochip.com>,
        Jassi Brar <jassisinghbrar@...il.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v3 3/8] mailbox: mpfs: ditch a useless busy check

From: Conor Dooley <conor.dooley@...rochip.com>

mpfs_mbox_rx_data() already checks if the system controller is busy
before attempting to do anything, so drop the second check before
reading any data.

No functional change intended.

Signed-off-by: Conor Dooley <conor.dooley@...rochip.com>
---
 drivers/mailbox/mailbox-mpfs.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/mailbox/mailbox-mpfs.c b/drivers/mailbox/mailbox-mpfs.c
index e0e825bdbad9..0d176aba3462 100644
--- a/drivers/mailbox/mailbox-mpfs.c
+++ b/drivers/mailbox/mailbox-mpfs.c
@@ -170,12 +170,10 @@ static void mpfs_mbox_rx_data(struct mbox_chan *chan)
 	if (response->resp_status)
 		return;
 
-	if (!mpfs_mbox_busy(mbox)) {
-		for (i = 0; i < num_words; i++) {
-			response->resp_msg[i] =
-				readl_relaxed(mbox->mbox_base
-					      + mbox->resp_offset + i * 0x4);
-		}
+	for (i = 0; i < num_words; i++) {
+		response->resp_msg[i] =
+			readl_relaxed(mbox->mbox_base
+				      + mbox->resp_offset + i * 0x4);
 	}
 
 	mbox_chan_received_data(chan, response);
-- 
2.39.2