From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.13]) (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 B3E65382F04 for ; Tue, 3 Mar 2026 09:28:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.13 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772530106; cv=none; b=T0RMrbG3uqPTG30YP0LDi9tnpnJ3eqAQpCeMDnkMPX3YzK38zSWX683C5T1GPVsZLtXdRft1NHZplClBRQpe4gaiUPXp4ySzfZbQTPmG0OEbWOxgwzed0I3tXl7NlhzAgtbBPDiEKzLAyhzmZC2VVSMjDpIGZueMhh/tli3fQfo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772530106; c=relaxed/simple; bh=Qd9DBS18m/CUGyyErtvMZXRZeolk997D0Nzh7CbbEY0=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=X+FHeYzSwoMweV3U/XeZCzB7p3YNU6Ir2vpfXFi3BqSqWhU709LYJgVTq9e6shXPYZ0tU1y7QYcjfcLArEKGYJzRh0HzcQ1aRFCxx3c7BmRJeju0saSqSlHvHooH/VqlKFu/i1KSkQ1vInVlw3nErrJHcA59ZrwHz6kKAF4+yUY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=KRG8T2cJ; arc=none smtp.client-ip=192.198.163.13 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="KRG8T2cJ" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1772530105; x=1804066105; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=Qd9DBS18m/CUGyyErtvMZXRZeolk997D0Nzh7CbbEY0=; b=KRG8T2cJXaelqjpok6xgVZRzxm5DDtd6QxfLaj2ipAkyyfOxbEvK1yG/ nbUMtwOgzQ77v+QFcir6FuTrDs34fYYYEwHS9QIN2e0HSb3f6QdrGdRzw NBh6QISWpH9VooRwUszxB3zxIFcuPnosR4si0w5dbgJvYIOOQAnzw20MW A159GhNS0lWCUcVpzutNmZyX/NLkwsoE97JKvXCvzJ9UtvvOLGgAbho7q aJdIp5wTjwPXurJgzRr95jrXOaIoJCsR1xKXZYRWyK4kBuYXlCoulSEXm ULO/a+csfh/Mbz8FVQyQoAeRYGnWOVwNnB4nz+dazYA+jqmg+TMKtvBGi g==; X-CSE-ConnectionGUID: zzMCd4vkQ1ufl1ZURZcOcA== X-CSE-MsgGUID: 0fyLXYWHTOqEBSHJGx6tAw== X-IronPort-AV: E=McAfee;i="6800,10657,11717"; a="76158827" X-IronPort-AV: E=Sophos;i="6.21,321,1763452800"; d="scan'208";a="76158827" Received: from orviesa003.jf.intel.com ([10.64.159.143]) by fmvoesa107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Mar 2026 01:28:24 -0800 X-CSE-ConnectionGUID: lPrGuFCHR4+7Nle2+C5YYw== X-CSE-MsgGUID: z0IUxQKCQXyRpIe1DR4IWQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,321,1763452800"; d="scan'208";a="222095483" Received: from black.igk.intel.com ([10.91.253.5]) by orviesa003.jf.intel.com with ESMTP; 03 Mar 2026 01:28:23 -0800 Received: by black.igk.intel.com (Postfix, from userid 1003) id 2C37795; Tue, 03 Mar 2026 10:28:21 +0100 (CET) From: Andy Shevchenko To: Mark Brown , Andy Shevchenko , linux-kernel@vger.kernel.org, driver-core@lists.linux.dev Cc: Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich Subject: [PATCH v5 0/2] regcache: Avoid accessing non-initialised cache Date: Tue, 3 Mar 2026 10:26:23 +0100 Message-ID: <20260303092820.2818138-1-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.50.1 Precedence: bulk X-Mailing-List: driver-core@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Refactor regcache flow that populates cache on initialisation phase based on the values in HW. This makes code robust against any possible accesses to not-fully initialised caches. Changelog v5: - added a precursor patch to make things clearer - also put the freeing resources into an order (Mark) - dropped applied patches v4: 20260302095847.2310066-1-andriy.shevchenko@linux.intel.com Changelog v4: - made conditional against 'count' to make it less dependent to the previous code path v3: 20260226135918.381979-1-andriy.shevchenko@linux.intel.com Changelog v3: - dropped unneeded churn in patch 3 (Mark) - fixed code to pass kunit test cases (Mark) v2: 20260225161659.3811671-1-andriy.shevchenko@linux.intel.com Changelog v2: - rebased on top of the latest regmap changes (Mark) - added two more little cleanups (patches 4 & 5) Andy Shevchenko (2): regcache: Factor out regcache_hw_exit() helper regcache: Move HW readback after cache initialisation drivers/base/regmap/regcache.c | 46 +++++++++++++++++++++------------- 1 file changed, 29 insertions(+), 17 deletions(-) -- 2.50.1