linux-kernel - [PATCH v1 3/7] mailbox: mpfs: ditch a useless busy check

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20230111134513.2495510-4-conor.dooley@microchip.com>
Date:   Wed, 11 Jan 2023 13:45:09 +0000
From:   Conor Dooley <conor.dooley@...rochip.com>
To:     Jassi Brar <jassisinghbrar@...il.com>
CC:     Conor Dooley <conor.dooley@...rochip.com>,
        Daire McNamara <daire.mcnamara@...rochip.com>,
        <linux-riscv@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v1 3/7] mailbox: mpfs: ditch a useless busy check

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);
-- 
2.39.0