From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3654E33F38A for ; Sat, 28 Feb 2026 17:52:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772301178; cv=none; b=PJSyTgGrUbCS6w1O/jHrXBrQVWEb4UBabubJDUs6IJb6cJ56a25VeyJAn7CWVkXE2s6RFzpTNAN+hFXZ2RC7OlyY4YwPYFiH5HtyUzygeNZGNAkT7cIIY+yeH/fSkxlbWcEoM5n9wMdL9cJZa70ckjYMlOhk9AR5MxpnnukuFSg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772301178; c=relaxed/simple; bh=cMDqkK33dyeBBPrf5Ta6K24p+p4t+4mm1cDDdK4KIqc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=b0YEQbe9b3Fi2jI2LVyeyusx4KLEwga6EuW7+l+fds8B9r0dsdUzNllzkIQSK8Ssv+s6Q3XKMQGILX+JvdGRk14fGBafDaQ6dYiwjhJp4nxb9T/Rx7m/i/HpLqKLhEVLPEOmS4XGy3bYO6rfbVPbd6HnXX3KXZgzBX5uttBKnnA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DnXhZiW+; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="DnXhZiW+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 98B8BC19423; Sat, 28 Feb 2026 17:52:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772301178; bh=cMDqkK33dyeBBPrf5Ta6K24p+p4t+4mm1cDDdK4KIqc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DnXhZiW+w8N4r44qe9EHN0l2qIUL5eiNAZm2lBJ1anYXBasyIXrzInw4tuPRaMWzN 8aj7xEb4B/zMMyGz2PsYqDbkb4iBhqVlmNRKJV8/oXqop6OsfQ5atVDZ0PTqkQOTIf pPwvo8Wk7kZyIZNoKX5dNDfqjvTJFm8mWDaMClvZfJOvTSHvdSXkipKk4G8DorudHv PosCP1xdRIiwrerpRbJmJ17tCbBZL4dQ1F3O6vGl6GqC88JcLTPePQHw7qRXPzE/D2 PcjsknqeAtCZ9Pay8e5FAuOFuOktk2XbWX1ocGPKvgg+eSWBNyJekQF8UBxoIKnD7R e8nEeN4sDTdAA== From: Sasha Levin To: patches@lists.linux.dev Cc: Moteen Shah , Greg Kroah-Hartman , Sasha Levin Subject: [PATCH 6.18 346/752] serial: 8250: 8250_omap.c: Clear DMA RX running status only after DMA termination is done Date: Sat, 28 Feb 2026 12:40:57 -0500 Message-ID: <20260228174750.1542406-346-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260228174750.1542406-1-sashal@kernel.org> References: <20260228174750.1542406-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit From: Moteen Shah [ Upstream commit a5fd8945a478ff9be14812693891d7c9b4185a50 ] Clear rx_running flag only after DMA teardown polling completes. In the previous implementation the flag was being cleared while hardware teardown was still in progress, creating a mismatch between software state (flag = 0, "ready") and hardware state (still terminating). Signed-off-by: Moteen Shah Link: https://patch.msgid.link/20260112081829.63049-3-m-shah@ti.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/tty/serial/8250/8250_omap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c index e26bae0a6488f..272bc07c9a6b5 100644 --- a/drivers/tty/serial/8250/8250_omap.c +++ b/drivers/tty/serial/8250/8250_omap.c @@ -931,7 +931,6 @@ static void __dma_rx_do_complete(struct uart_8250_port *p) goto out; cookie = dma->rx_cookie; - dma->rx_running = 0; /* Re-enable RX FIFO interrupt now that transfer is complete */ if (priv->habit & UART_HAS_RHR_IT_DIS) { @@ -965,6 +964,7 @@ static void __dma_rx_do_complete(struct uart_8250_port *p) goto out; ret = tty_insert_flip_string(tty_port, dma->rx_buf, count); + dma->rx_running = 0; p->port.icount.rx += ret; p->port.icount.buf_overrun += count - ret; out: -- 2.51.0