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 A9148C433EF for ; Tue, 10 May 2022 13:46:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243451AbiEJNuQ (ORCPT ); Tue, 10 May 2022 09:50:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47384 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244796AbiEJNrB (ORCPT ); Tue, 10 May 2022 09:47:01 -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 5B076195BE1; Tue, 10 May 2022 06:32:05 -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 dfw.source.kernel.org (Postfix) with ESMTPS id EE375615C8; Tue, 10 May 2022 13:32:04 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DF981C385A6; Tue, 10 May 2022 13:32:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1652189524; bh=/jM/xkpLU4pNVj7m9v810zL6YmMq+x9MUFy1AJ5qtFc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=z5dYnDvL2tF5DuYGaVu0i82736BLzs2IQPd7M212cHJ9Mg2+WOfDXn/l27sqviXnp GPJyBPUu1TWE2am2V3x1X8P2za4gCSnMFQQSr0Plkk+ml5g1Fo+LWisTQrgnm4VAle 3CueQFoZllMt9nRSLxJAQA/ktffTKXq7TRymxHjQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Puyou Lu , Bartosz Golaszewski Subject: [PATCH 5.15 041/135] gpio: pca953x: fix irq_stat not updated when irq is disabled (irq_mask not set) Date: Tue, 10 May 2022 15:07:03 +0200 Message-Id: <20220510130741.579131175@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220510130740.392653815@linuxfoundation.org> References: <20220510130740.392653815@linuxfoundation.org> User-Agent: quilt/0.66 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: Puyou Lu commit dba785798526a3282cc4d0f0ea751883715dbbb4 upstream. When one port's input state get inverted (eg. from low to hight) after pca953x_irq_setup but before setting irq_mask (by some other driver such as "gpio-keys"), the next inversion of this port (eg. from hight to low) will not be triggered any more (because irq_stat is not updated at the first time). Issue should be fixed after this commit. Fixes: 89ea8bbe9c3e ("gpio: pca953x.c: add interrupt handling capability") Signed-off-by: Puyou Lu Signed-off-by: Bartosz Golaszewski Signed-off-by: Greg Kroah-Hartman --- drivers/gpio/gpio-pca953x.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -762,11 +762,11 @@ static bool pca953x_irq_pending(struct p bitmap_xor(cur_stat, new_stat, old_stat, gc->ngpio); bitmap_and(trigger, cur_stat, chip->irq_mask, gc->ngpio); + bitmap_copy(chip->irq_stat, new_stat, gc->ngpio); + if (bitmap_empty(trigger, gc->ngpio)) return false; - bitmap_copy(chip->irq_stat, new_stat, gc->ngpio); - bitmap_and(cur_stat, chip->irq_trig_fall, old_stat, gc->ngpio); bitmap_and(old_stat, chip->irq_trig_raise, new_stat, gc->ngpio); bitmap_or(new_stat, old_stat, cur_stat, gc->ngpio);