From patchwork Fri Oct 25 01:43:44 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Torokhov X-Patchwork-Id: 13849950 Received: from mail-yw1-f172.google.com (mail-yw1-f172.google.com [209.85.128.172]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9E1381339A4; Fri, 25 Oct 2024 01:43:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729820630; cv=none; b=PEJnX1OyQ5m4ZT+4V87CVLyyDuI672iKEtl+FrBXVdU7GhcQ32iVoki4X8N1ThEP8XeIOy7OX4zzqt7Qo/8CQUXE05DIDzKCFVC48w4h5LE0a8Oe/ROftsMigfc44DG0g5RHTL7TnKAnp7sc8hL+Zba7zjI+4f+weVb5Z9n8KCA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729820630; c=relaxed/simple; bh=AYdbDzYteBMJENppX6/EUKrwUvFettDvvcZ4FaF+xqg=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=MnCMGWrRJSnN1Zp/6KPIqJZbcaZKvtj6iPkQSxQqMm3+ZceqUNe8aSG7xlcJg6X0jCGBTs1XLktx1KKJv+REIACTHKeDCI3RapOWl0ibvVNMsUyCArXbCT1L6ISLh9jwNkGgdnBPUgXKuDoca5zNx38g8gz/sAwRAhV7Rya0V3k= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=dmesicOA; arc=none smtp.client-ip=209.85.128.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="dmesicOA" Received: by mail-yw1-f172.google.com with SMTP id 00721157ae682-6e5ef7527deso18202737b3.0; Thu, 24 Oct 2024 18:43:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1729820627; x=1730425427; darn=vger.kernel.org; h=content-disposition:mime-version:message-id:subject:cc:to:from:date :from:to:cc:subject:date:message-id:reply-to; bh=N2HiBsa0ajxk+aOOy2ifb/DFIXKGzhQ2omglgYUqaPE=; b=dmesicOAqtfVqqkoB42wWXeHhKl83tdkja24F+Z4ZDW2mPXLub6JGdoNiVKw0fRtl4 wxAtDSkVvHa63NyuyD0p6swPg8RrgalH4KpWV/sLMWk6OQF7/7LTbqmGva0weQBHYXar 9BoImIJmePzmMHDTidT5RdCV5bCcn+iXYrs3EKqeNFPE9fFAAjppm85FV8CZDRdfDw61 dGEq7H8nD4n5UB5HtbckBogFvLpiIv2D8+51ZlZJNUAluqgPM3wfnPdIU2DO8aHdAskQ Wltvpd7ztzjRIv+yAY8nEocX52tGBj8DY+d+CeY8xIRSwCe67mVR0ShHLqF9oax7bIP6 OShw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1729820627; x=1730425427; h=content-disposition:mime-version:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=N2HiBsa0ajxk+aOOy2ifb/DFIXKGzhQ2omglgYUqaPE=; b=saLNqMWxDJ53HEP2QZc+kTqKcqJQFO+9A8diwJtuu221Pwt3HZSNkrTacFOpygLieO 2YvnWiW1s5udcohwithKOTbzkXL3NRz9EcdRV57xDtd03m1+0XcTOXPEaVMIvCZDxhy5 wNJfonsaYyE9N5D7isUudiIP30QR125FAYBb/gP5rcG+TqlVC7L5BN3icRMNUpICPVka SxYdXK16HONfrlBHBCAFvOyNTfTfeO2BV9DKSVSmPcy4+Dx7K81/oZ8/rflJyJGezIiC O/a64jVRpHeDQFglIgjzbfDXhodgE0XZV5eHCT91hiDkU1L4zmpkA0xU5YfkvzS8DDfD 3gJA== X-Forwarded-Encrypted: i=1; AJvYcCV8QdVTqSQo0seimq1QAZh5ux8AG/uy+Hj5rd80UK10kP5AH7gdG9MFAXUYn5Of/vfoqLsXbQ+0iV/Lk2k=@vger.kernel.org X-Gm-Message-State: AOJu0Yyg/6fruM9X8VlSZJvJKj9b9Ynq5X1+wZ2ORQokyKwbRs4rejUu FzD/qDN5xf/PhyoXV0Seva82Iqjz3RlEZfyY/vZjlnfj1FTgLtszWfjPTQ== X-Google-Smtp-Source: AGHT+IH800DcZdVuCht4HznqfakBPKE41IOUTnqOUQ9esvpayVFiAA44Ox56JKM8vHL9c3F+H3nVcA== X-Received: by 2002:a05:690c:91:b0:6e3:116c:ebf3 with SMTP id 00721157ae682-6e7f0fac744mr84307797b3.28.1729820627496; Thu, 24 Oct 2024 18:43:47 -0700 (PDT) Received: from google.com ([2620:15c:9d:2:a810:a864:e2e2:2651]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-720579397d8sm82391b3a.86.2024.10.24.18.43.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Oct 2024 18:43:47 -0700 (PDT) Date: Thu, 24 Oct 2024 18:43:44 -0700 From: Dmitry Torokhov To: Helge Deller Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] Input: hilkbd - use guard notation when acquiring spinlock Message-ID: Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline Using guard notation makes the code more compact and error handling more robust by ensuring that locks are released in all code paths when control leaves critical section. Signed-off-by: Dmitry Torokhov --- drivers/input/keyboard/hilkbd.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/input/keyboard/hilkbd.c b/drivers/input/keyboard/hilkbd.c index c1a4d5055de6..c8d8d0ea35b0 100644 --- a/drivers/input/keyboard/hilkbd.c +++ b/drivers/input/keyboard/hilkbd.c @@ -180,9 +180,8 @@ static irqreturn_t hil_interrupt(int irq, void *handle) /* send a command to the HIL */ static void hil_do(unsigned char cmd, unsigned char *data, unsigned int len) { - unsigned long flags; + guard(spinlock_irqsave)(&hil_dev.lock); - spin_lock_irqsave(&hil_dev.lock, flags); while (hil_busy()) /* wait */; hil_command(cmd); @@ -191,7 +190,6 @@ static void hil_do(unsigned char cmd, unsigned char *data, unsigned int len) /* wait */; hil_write_data(*(data++)); } - spin_unlock_irqrestore(&hil_dev.lock, flags); }