From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752639AbbH0D1O (ORCPT ); Wed, 26 Aug 2015 23:27:14 -0400 Received: from bh-25.webhostbox.net ([208.91.199.152]:41841 "EHLO bh-25.webhostbox.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751016AbbH0D1L (ORCPT ); Wed, 26 Aug 2015 23:27:11 -0400 From: Guenter Roeck To: Greg Kroah-Hartman , Steve Glendinning Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org, "Rafael J. Wysocki" , Jeremy Linton , tony@atomide.com, Guenter Roeck Subject: [PATCH -next v3 1/2] device property: Return -ENXIO if there is no suitable FW interface Date: Wed, 26 Aug 2015 20:27:04 -0700 Message-Id: <1440646025-18999-1-git-send-email-linux@roeck-us.net> X-Mailer: git-send-email 2.1.4 X-Authenticated_sender: guenter@roeck-us.net X-OutGoing-Spam-Status: No, score=-1.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - bh-25.webhostbox.net X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - roeck-us.net X-Get-Message-Sender-Via: bh-25.webhostbox.net: authenticated_id: guenter@roeck-us.net X-Source: X-Source-Args: X-Source-Dir: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return -ENXIO if device property array access functions don't find a suitable firmware interface. This lets drivers decide if they should use available platform data instead. Cc: Rafael J. Wysocki Signed-off-by: Guenter Roeck --- v2: Added patch v3: Document that device_property_read_string_array and device_property_read_string can also return -ENXIO. Move check if there is pset data, and thus detection if there is a suitable firmwawre interface, out of pset_prop_read_array into the calling code. drivers/base/property.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/drivers/base/property.c b/drivers/base/property.c index 287704d680bf..caf937af98b3 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -156,6 +156,7 @@ EXPORT_SYMBOL_GPL(fwnode_property_present); * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of numbers, * %-EOVERFLOW if the size of the property is not as expected. + * %-ENXIO if no suitable firmware interface is present. */ int device_property_read_u8_array(struct device *dev, const char *propname, u8 *val, size_t nval) @@ -180,6 +181,7 @@ EXPORT_SYMBOL_GPL(device_property_read_u8_array); * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of numbers, * %-EOVERFLOW if the size of the property is not as expected. + * %-ENXIO if no suitable firmware interface is present. */ int device_property_read_u16_array(struct device *dev, const char *propname, u16 *val, size_t nval) @@ -204,6 +206,7 @@ EXPORT_SYMBOL_GPL(device_property_read_u16_array); * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of numbers, * %-EOVERFLOW if the size of the property is not as expected. + * %-ENXIO if no suitable firmware interface is present. */ int device_property_read_u32_array(struct device *dev, const char *propname, u32 *val, size_t nval) @@ -228,6 +231,7 @@ EXPORT_SYMBOL_GPL(device_property_read_u32_array); * %-ENODATA if the property does not have a value, * %-EPROTO if the property is not an array of numbers, * %-EOVERFLOW if the size of the property is not as expected. + * %-ENXIO if no suitable firmware interface is present. */ int device_property_read_u64_array(struct device *dev, const char *propname, u64 *val, size_t nval) @@ -252,6 +256,7 @@ EXPORT_SYMBOL_GPL(device_property_read_u64_array); * %-ENODATA if the property does not have a value, * %-EPROTO or %-EILSEQ if the property is not an array of strings, * %-EOVERFLOW if the size of the property is not as expected. + * %-ENXIO if no suitable firmware interface is present. */ int device_property_read_string_array(struct device *dev, const char *propname, const char **val, size_t nval) @@ -273,6 +278,7 @@ EXPORT_SYMBOL_GPL(device_property_read_string_array); * %-EINVAL if given arguments are not valid, * %-ENODATA if the property does not have a value, * %-EPROTO or %-EILSEQ if the property type is not a string. + * %-ENXIO if no suitable firmware interface is present. */ int device_property_read_string(struct device *dev, const char *propname, const char **val) @@ -294,9 +300,11 @@ EXPORT_SYMBOL_GPL(device_property_read_string); else if (is_acpi_node(_fwnode_)) \ _ret_ = acpi_dev_prop_read(to_acpi_node(_fwnode_), _propname_, \ _proptype_, _val_, _nval_); \ - else \ + else if (is_pset(_fwnode_)) \ _ret_ = pset_prop_read_array(to_pset(_fwnode_), _propname_, \ _proptype_, _val_, _nval_); \ + else \ + _ret_ = -ENXIO; \ _ret_; \ }) @@ -434,9 +442,10 @@ int fwnode_property_read_string_array(struct fwnode_handle *fwnode, else if (is_acpi_node(fwnode)) return acpi_dev_prop_read(to_acpi_node(fwnode), propname, DEV_PROP_STRING, val, nval); - - return pset_prop_read_array(to_pset(fwnode), propname, - DEV_PROP_STRING, val, nval); + else if (is_pset(fwnode)) + return pset_prop_read_array(to_pset(fwnode), propname, + DEV_PROP_STRING, val, nval); + return -ENXIO; } EXPORT_SYMBOL_GPL(fwnode_property_read_string_array); -- 2.1.4