From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 1704C24DCF6; Mon, 13 Apr 2026 16:16:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776097006; cv=none; b=cjdoSu227z9rlEtCWXURU7/O5fUuufuPK2fEqSUNVRRaU5A4cAIiFaqNPOQY26JRT2hv5tTwWsCGHmtQZIkll1sziGyBllMReouofGZqP9Q4FrUrkzfwd1qPSnJgBfM/rEFDZ0P+4lqAgZKUSKuuvvoRVEMF9wscvebTbUlTXNI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776097006; c=relaxed/simple; bh=qDq/xGUiZXBfunN82ZRS5JkQZKtRyUQwSUJFsqd132w=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=IoWNx/mB+l+M1ieizbjOUXBH9tdiMLy5Cm/oWp7KR671ecXRirfZtzwuRfxeJQYeH5UV/yXS3vM7KmilZ85fpC6QY3HznxRox1njx/G7SafjjSFmzFebGliAQAJtVNckqKSTc5iWYkT6QlIROY+Kyk8BWRZIi8L3F5UVMf4Rk/U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=pUGTrATp; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="pUGTrATp" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A2CAEC2BCAF; Mon, 13 Apr 2026 16:16:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1776097006; bh=qDq/xGUiZXBfunN82ZRS5JkQZKtRyUQwSUJFsqd132w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pUGTrATp3rLCTiCXgkbmYtTJXVzEbzY2RYNRq1N5abuAmdG4i2IlDVoi0oBC3jnX7 65L7PndhMs3Xl11wrDSGec9xAveBAl/2b4959Hk1ruNkZ2R+JZdQJe9zuLsZkPaerK o9o4tQu8qY6Xtlcw32l9wUt2wI+DkfVIuAOI8gc8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Hans de Goede , "Rafael J. Wysocki" , Sasha Levin Subject: [PATCH 6.1 26/55] ACPI: EC: Evaluate _REG outside the EC scope more carefully Date: Mon, 13 Apr 2026 18:01:00 +0200 Message-ID: <20260413155725.807194765@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260413155724.820472494@linuxfoundation.org> References: <20260413155724.820472494@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: "Rafael J. Wysocki" [ Upstream commit 71bf41b8e913ec9fc91f0d39ab8fb320229ec604 ] Commit 60fa6ae6e6d0 ("ACPI: EC: Install address space handler at the namespace root") caused _REG methods for EC operation regions outside the EC device scope to be evaluated which on some systems leads to the evaluation of _REG methods in the scopes of device objects representing devices that are not present and not functional according to the _STA return values. Some of those device objects represent EC "alternatives" and if _REG is evaluated for their operation regions, the platform firmware may be confused and the platform may start to behave incorrectly. To avoid this problem, only evaluate _REG for EC operation regions located in the scopes of device objects representing known-to-be-present devices. For this purpose, partially revert commit 60fa6ae6e6d0 and trigger the evaluation of _REG for EC operation regions from acpi_bus_attach() for the known-valid devices. Fixes: 60fa6ae6e6d0 ("ACPI: EC: Install address space handler at the namespace root") Link: https://lore.kernel.org/linux-acpi/1f76b7e2-1928-4598-8037-28a1785c2d13@redhat.com Link: https://bugzilla.redhat.com/show_bug.cgi?id=2298938 Link: https://bugzilla.redhat.com/show_bug.cgi?id=2302253 Reported-by: Hans de Goede Signed-off-by: Rafael J. Wysocki Reviewed-by: Hans de Goede Cc: All applicable Link: https://patch.msgid.link/23612351.6Emhk5qWAg@rjwysocki.net Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/acpi/ec.c | 11 +++++++++-- drivers/acpi/internal.h | 1 + drivers/acpi/scan.c | 2 ++ 3 files changed, 12 insertions(+), 2 deletions(-) --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -1512,12 +1512,13 @@ static bool install_gpio_irq_event_handl static int ec_install_handlers(struct acpi_ec *ec, struct acpi_device *device, bool call_reg) { - acpi_handle scope_handle = ec == first_ec ? ACPI_ROOT_OBJECT : ec->handle; acpi_status status; acpi_ec_start(ec, false); if (!test_bit(EC_FLAGS_EC_HANDLER_INSTALLED, &ec->flags)) { + acpi_handle scope_handle = ec == first_ec ? ACPI_ROOT_OBJECT : ec->handle; + acpi_ec_enter_noirq(ec); status = acpi_install_address_space_handler_no_reg(scope_handle, ACPI_ADR_SPACE_EC, @@ -1531,7 +1532,7 @@ static int ec_install_handlers(struct ac } if (call_reg && !test_bit(EC_FLAGS_EC_REG_CALLED, &ec->flags)) { - acpi_execute_reg_methods(scope_handle, ACPI_UINT32_MAX, ACPI_ADR_SPACE_EC); + acpi_execute_reg_methods(ec->handle, ACPI_UINT32_MAX, ACPI_ADR_SPACE_EC); set_bit(EC_FLAGS_EC_REG_CALLED, &ec->flags); } @@ -1749,6 +1750,12 @@ static int acpi_ec_remove(struct acpi_de return 0; } +void acpi_ec_register_opregions(struct acpi_device *adev) +{ + if (first_ec && first_ec->handle != adev->handle) + acpi_execute_reg_methods(adev->handle, 1, ACPI_ADR_SPACE_EC); +} + static acpi_status ec_parse_io_ports(struct acpi_resource *resource, void *context) { --- a/drivers/acpi/internal.h +++ b/drivers/acpi/internal.h @@ -210,6 +210,7 @@ int acpi_ec_add_query_handler(struct acp acpi_handle handle, acpi_ec_query_func func, void *data); void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit); +void acpi_ec_register_opregions(struct acpi_device *adev); #ifdef CONFIG_PM_SLEEP void acpi_ec_flush_work(void); --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -2198,6 +2198,8 @@ static int acpi_bus_attach(struct acpi_d if (device->handler) goto ok; + acpi_ec_register_opregions(device); + if (!device->flags.initialized) { device->flags.power_manageable = device->power.states[ACPI_STATE_D0].flags.valid;