From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.19]) (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 AD878375F9E for ; Thu, 5 Mar 2026 08:54:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.19 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772700897; cv=none; b=Ekm8uzfcKxOvLZ+aGhIhlYmnTK6hk+YQkbO02eOHsghikqq2WAxdjadhJYYdTT9tf+sLGAnSONWJ0T9Dc9CS9he5N9JqCtKTdMaHmiDeYDfsJSGNp3ja9p66tjxb8hCHFgqcj8/zvXx7Ro+WY8vwlOMLXzjn2RyCsqBvvqLBMEE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772700897; c=relaxed/simple; bh=ncHeq+ah16rZNtN/74k33aTkvCBaxfd0eBCLEnirrLw=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=cVks1zRlBU9hMoKhkIerNJDcELK4GZ361Gkx25kQJazceIdvSxQP/R06w35p4dFKrfVyEeYfhHBjVnSVyqnaUNmJkDDsoZ3VfLFV4VbF4970//0kWlyMZT5hUNBSKZXgBWq2/H/UkrScdyyGsRlzlRFuO7IMwPLGKcdtDU4PnoM= 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=CUBuffch; arc=none smtp.client-ip=198.175.65.19 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="CUBuffch" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1772700896; x=1804236896; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=ncHeq+ah16rZNtN/74k33aTkvCBaxfd0eBCLEnirrLw=; b=CUBuffchEG8phE5wM59v/tIlshEhDZ9YvOUUA1Xg6iLJGukf6LuPAqFt 8GrU2RL6+ZeIA9ew2y4OytxW2RbtpykF1NwgJEeCxjgZRlZBZxPFtKjeg 5V9nnPESzXu9N8Z0sa3ks8HkUMKkQLRqNkiDqfhJVqdrNC24kQ9FDOQfG 28dn41LcaF2fh/rbEE6+x0N2c7iZFoCXcKw3mT6/fRYyvN2x84fgfgxw9 nT/qmvSKEO7rH8lF1FY0RpU76+NLxY0l1e5egXIkSXp+jazpIXcYwUswL 9psG8oQJirjA14HdIn766foL5xLR5DwrCDSo3RCMVYIutp0+qRllEPDdf w==; X-CSE-ConnectionGUID: czSxZcCFT1K9ezagQ1iAgw== X-CSE-MsgGUID: PD9FozjcRmmVZPfJkXdH+Q== X-IronPort-AV: E=McAfee;i="6800,10657,11719"; a="73687430" X-IronPort-AV: E=Sophos;i="6.21,325,1763452800"; d="scan'208";a="73687430" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by orvoesa111.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Mar 2026 00:54:53 -0800 X-CSE-ConnectionGUID: ixMqgIqMTo2DdV1lzK8Yig== X-CSE-MsgGUID: XZCwT8tISVOjBtlKdwqSjQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,325,1763452800"; d="scan'208";a="216425989" Received: from black.igk.intel.com ([10.91.253.5]) by fmviesa007.fm.intel.com with ESMTP; 05 Mar 2026 00:54:51 -0800 Received: by black.igk.intel.com (Postfix, from userid 1003) id 5407495; Thu, 05 Mar 2026 09:54:50 +0100 (CET) From: Andy Shevchenko To: Andy Shevchenko , linux-kernel@vger.kernel.org, driver-core@lists.linux.dev Cc: Mark Brown , Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich Subject: [PATCH v6 0/3] regcache: Avoid accessing non-initialised cache Date: Thu, 5 Mar 2026 09:52:59 +0100 Message-ID: <20260305085449.3184020-1-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.50.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org 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 v6: - refactored to make sure we always clean up the allocated resources (Mark) - dropped applied patches v5: 20260303092820.2818138-1-andriy.shevchenko@linux.intel.com 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 (3): regcache: Move count check and cache_bypass assignment to the caller regcache: Allocate and free reg_defaults on the same level regcache: Move HW readback after cache initialisation drivers/base/regmap/regcache.c | 63 +++++++++++++++++----------------- 1 file changed, 31 insertions(+), 32 deletions(-) -- 2.50.1