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 B75B24C6A for ; Mon, 14 Nov 2022 12:48:32 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id F3564C433C1; Mon, 14 Nov 2022 12:48:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1668430112; bh=D/3VIy+oz+ggmtGWhGlLqjWtvSbXGm2R9zUvy6ChjAM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MtS2MoAlXQ3Z5Lrv7v1ledcA4stCkv/dhN90ueljOWemS62aAKoDEhlbJqWZ/zJvW xazXd3pSb+LLcWIPiZBqI+wnxPF5zKpqJojfUWfqu4RxAipKfZU90e20oafW2M+fss M1gnqr99byJG9a/7B18L2YUnXHFaByshF+yLZ/+g= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Rasmus Villemoes , Martin Blumenstingl , Jakub Kicinski , Sasha Levin Subject: [PATCH 5.10 30/95] net: stmmac: dwmac-meson8b: fix meson8b_devm_clk_prepare_enable() Date: Mon, 14 Nov 2022 13:45:24 +0100 Message-Id: <20221114124443.795566400@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221114124442.530286937@linuxfoundation.org> References: <20221114124442.530286937@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Rasmus Villemoes [ Upstream commit ed4314f7729714d788698ade4f9905ee5378ebc0 ] There are two problems with meson8b_devm_clk_prepare_enable(), introduced in commit a54dc4a49045 ("net: stmmac: dwmac-meson8b: Make the clock enabling code re-usable"): - It doesn't pass the clk argument, but instead always the rgmii_tx_clk of the device. - It silently ignores the return value of devm_add_action_or_reset(). The former didn't become an actual bug until another user showed up in the next commit 9308c47640d5 ("net: stmmac: dwmac-meson8b: add support for the RX delay configuration"). The latter means the callers could end up with the clock not actually prepared/enabled. Fixes: a54dc4a49045 ("net: stmmac: dwmac-meson8b: Make the clock enabling code re-usable") Signed-off-by: Rasmus Villemoes Reviewed-by: Martin Blumenstingl Link: https://lore.kernel.org/r/20221104083004.2212520-1-linux@rasmusvillemoes.dk Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c index 752658ec7bee..50ef68497bce 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c @@ -261,11 +261,9 @@ static int meson8b_devm_clk_prepare_enable(struct meson8b_dwmac *dwmac, if (ret) return ret; - devm_add_action_or_reset(dwmac->dev, - (void(*)(void *))clk_disable_unprepare, - dwmac->rgmii_tx_clk); - - return 0; + return devm_add_action_or_reset(dwmac->dev, + (void(*)(void *))clk_disable_unprepare, + clk); } static int meson8b_init_prg_eth(struct meson8b_dwmac *dwmac) -- 2.35.1