From mboxrd@z Thu Jan 1 00:00:00 1970 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 2C54BC0015E for ; Fri, 21 Jul 2023 19:17:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231984AbjGUTRE (ORCPT ); Fri, 21 Jul 2023 15:17:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39204 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231992AbjGUTRD (ORCPT ); Fri, 21 Jul 2023 15:17:03 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D729D1FD7 for ; Fri, 21 Jul 2023 12:17:01 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 6B3F461D2F for ; Fri, 21 Jul 2023 19:17:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7E349C433C8; Fri, 21 Jul 2023 19:17:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1689967020; bh=McjRgZ/WKDZ7bKVgxaylvT91AHbvU+Y93SW/nZyQheA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=W/Iat7Vh3GMOcS06ZzmASsFwUgI6H+nOaUdNepJbeTUo7LV/YYshkYz4EFDt6+pCf Ej1Z0kaerhZA32+ttsUtrxSzRCL46DYKLV2vOQ3pSebsavs7Gs8lfPqRcQd8aqwM3r M6U8UEu8RqkR5nxcDRJH4PMg/b0sFvtgsA+vM0ys= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Bryan Whitehead , UNGLinuxDriver@microchip.com, Moritz Fischer , Andrew Lunn , Paolo Abeni Subject: [PATCH 6.1 004/223] net: lan743x: Dont sleep in atomic context Date: Fri, 21 Jul 2023 18:04:17 +0200 Message-ID: <20230721160521.060661083@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230721160520.865493356@linuxfoundation.org> References: <20230721160520.865493356@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Moritz Fischer commit 7a8227b2e76be506b2ac64d2beac950ca04892a5 upstream. dev_set_rx_mode() grabs a spin_lock, and the lan743x implementation proceeds subsequently to go to sleep using readx_poll_timeout(). Introduce a helper wrapping the readx_poll_timeout_atomic() function and use it to replace the calls to readx_polL_timeout(). Fixes: 23f0703c125b ("lan743x: Add main source files for new lan743x driver") Cc: stable@vger.kernel.org Cc: Bryan Whitehead Cc: UNGLinuxDriver@microchip.com Signed-off-by: Moritz Fischer Reviewed-by: Andrew Lunn Link: https://lore.kernel.org/r/20230627035000.1295254-1-moritzf@google.com Signed-off-by: Paolo Abeni Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/microchip/lan743x_main.c | 21 +++++++++++++++++---- 1 file changed, 17 insertions(+), 4 deletions(-) --- a/drivers/net/ethernet/microchip/lan743x_main.c +++ b/drivers/net/ethernet/microchip/lan743x_main.c @@ -144,6 +144,18 @@ static int lan743x_csr_light_reset(struc !(data & HW_CFG_LRST_), 100000, 10000000); } +static int lan743x_csr_wait_for_bit_atomic(struct lan743x_adapter *adapter, + int offset, u32 bit_mask, + int target_value, int udelay_min, + int udelay_max, int count) +{ + u32 data; + + return readx_poll_timeout_atomic(LAN743X_CSR_READ_OP, offset, data, + target_value == !!(data & bit_mask), + udelay_max, udelay_min * count); +} + static int lan743x_csr_wait_for_bit(struct lan743x_adapter *adapter, int offset, u32 bit_mask, int target_value, int usleep_min, @@ -746,8 +758,8 @@ static int lan743x_dp_write(struct lan74 u32 dp_sel; int i; - if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_, - 1, 40, 100, 100)) + if (lan743x_csr_wait_for_bit_atomic(adapter, DP_SEL, DP_SEL_DPRDY_, + 1, 40, 100, 100)) return -EIO; dp_sel = lan743x_csr_read(adapter, DP_SEL); dp_sel &= ~DP_SEL_MASK_; @@ -758,8 +770,9 @@ static int lan743x_dp_write(struct lan74 lan743x_csr_write(adapter, DP_ADDR, addr + i); lan743x_csr_write(adapter, DP_DATA_0, buf[i]); lan743x_csr_write(adapter, DP_CMD, DP_CMD_WRITE_); - if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_, - 1, 40, 100, 100)) + if (lan743x_csr_wait_for_bit_atomic(adapter, DP_SEL, + DP_SEL_DPRDY_, + 1, 40, 100, 100)) return -EIO; }