From nobody Fri Dec 19 17:34:32 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 35694FA373F for ; Mon, 24 Oct 2022 19:15:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230460AbiJXTPZ (ORCPT ); Mon, 24 Oct 2022 15:15:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54794 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232068AbiJXTO3 (ORCPT ); Mon, 24 Oct 2022 15:14:29 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 68C2C7F25E; Mon, 24 Oct 2022 10:53:05 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 84654B81975; Mon, 24 Oct 2022 12:41:47 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E4211C433C1; Mon, 24 Oct 2022 12:41:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1666615306; bh=t3dMiH4XJXVQqT24zBIQwudtQaBoBJjPnA3eH7aaObo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=m3Jqyta5v4tOn1sGi/8z9sj1yyxgiSGAG/jo3Neby/ClORV8OBYsOi804LhnGlX8J 2v+VcG9t4WpxB/I8Su5ZoluCiy93aOEMPPWPirWZN7e8R9eRm+FEGjrgCTmX9lZp5n wwtsVLxFNe+x08Wpw7NA4CuC1CA4cnGMived+4vE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Markus Schneider-Pargmann , Neil Armstrong , Mark Brown , Sasha Levin Subject: [PATCH 5.15 170/530] spi: meson-spicc: do not rely on busy flag in pow2 clk ops Date: Mon, 24 Oct 2022 13:28:34 +0200 Message-Id: <20221024113052.735450811@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221024113044.976326639@linuxfoundation.org> References: <20221024113044.976326639@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Neil Armstrong [ Upstream commit 36acf80fc0c4b5ebe6fa010b524d442ee7f08fd3 ] Since [1], controller's busy flag isn't set anymore when the __spi_transfer_message_noqueue() is used instead of the __spi_pump_transfer_message() logic for spi_sync transfers. Since the pow2 clock ops were limited to only be available when a transfer is ongoing (between prepare_transfer_hardware and unprepare_transfer_hardware callbacks), the only way to track this down is to check for the controller cur_msg. [1] ae7d2346dc89 ("spi: Don't use the message queue if possible in spi_sync= ") Fixes: 09992025dacd ("spi: meson-spicc: add local pow2 clock ops to preserv= e rate between messages") Fixes: ae7d2346dc89 ("spi: Don't use the message queue if possible in spi_s= ync") Reported-by: Markus Schneider-Pargmann Signed-off-by: Neil Armstrong Tested-by: Markus Schneider-Pargmann Link: https://lore.kernel.org/r/20220908121803.919943-1-narmstrong@baylibre= .com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/spi/spi-meson-spicc.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/spi/spi-meson-spicc.c b/drivers/spi/spi-meson-spicc.c index e4cb52e1fe26..6974a1c947aa 100644 --- a/drivers/spi/spi-meson-spicc.c +++ b/drivers/spi/spi-meson-spicc.c @@ -537,7 +537,7 @@ static unsigned long meson_spicc_pow2_recalc_rate(struc= t clk_hw *hw, struct clk_divider *divider =3D to_clk_divider(hw); struct meson_spicc_device *spicc =3D pow2_clk_to_spicc(divider); =20 - if (!spicc->master->cur_msg || !spicc->master->busy) + if (!spicc->master->cur_msg) return 0; =20 return clk_divider_ops.recalc_rate(hw, parent_rate); @@ -549,7 +549,7 @@ static int meson_spicc_pow2_determine_rate(struct clk_h= w *hw, struct clk_divider *divider =3D to_clk_divider(hw); struct meson_spicc_device *spicc =3D pow2_clk_to_spicc(divider); =20 - if (!spicc->master->cur_msg || !spicc->master->busy) + if (!spicc->master->cur_msg) return -EINVAL; =20 return clk_divider_ops.determine_rate(hw, req); @@ -561,7 +561,7 @@ static int meson_spicc_pow2_set_rate(struct clk_hw *hw,= unsigned long rate, struct clk_divider *divider =3D to_clk_divider(hw); struct meson_spicc_device *spicc =3D pow2_clk_to_spicc(divider); =20 - if (!spicc->master->cur_msg || !spicc->master->busy) + if (!spicc->master->cur_msg) return -EINVAL; =20 return clk_divider_ops.set_rate(hw, rate, parent_rate); --=20 2.35.1