linux-kernel - [PATCH] usb/core: Added devspec sysfs entry for devices behind usb hub

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Tue,  4 Oct 2016 12:04:40 -0700
From:   Vijay Kumar <vijay.ac.kumar@...cle.com>
To:     gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     vijay.ac.kumar@...cle.com
Subject: [PATCH] usb/core: Added devspec sysfs entry for devices behind usb hub

Grub finds incorrect of_node path for devices behind usb hub.
Added devspec sysfs entry for devices behind usb hub so that
right of_node path is returned during grub sysfs walk for these
devices.

Signed-off-by: Vijay Kumar <vijay.ac.kumar@...cle.com>

---
 drivers/usb/core/sysfs.c |   15 +++++++++++++++
 1 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index c953a0f..84d66d5 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -14,6 +14,7 @@
 #include <linux/string.h>
 #include <linux/usb.h>
 #include <linux/usb/quirks.h>
+#include <linux/of.h>
 #include "usb.h"
 
 /* Active configuration fields */
@@ -104,6 +105,17 @@ static ssize_t bConfigurationValue_store(struct device *dev,
 static DEVICE_ATTR_IGNORE_LOCKDEP(bConfigurationValue, S_IRUGO | S_IWUSR,
 		bConfigurationValue_show, bConfigurationValue_store);
 
+#ifdef CONFIG_OF
+static ssize_t devspec_show(struct device *dev, struct device_attribute *attr,
+			     char *buf)
+{
+	struct device_node *of_node = dev->of_node;
+
+	return sprintf(buf, "%s\n", of_node_full_name(of_node));
+}
+static DEVICE_ATTR_RO(devspec);
+#endif
+
 /* String fields */
 #define usb_string_attr(name)						\
 static ssize_t  name##_show(struct device *dev,				\
@@ -786,6 +798,9 @@ static struct attribute *dev_attrs[] = {
 	&dev_attr_remove.attr,
 	&dev_attr_removable.attr,
 	&dev_attr_ltm_capable.attr,
+#ifdef CONFIG_OF
+	&dev_attr_devspec.attr,
+#endif
 	NULL,
 };
 static struct attribute_group dev_attr_grp = {
-- 
1.7.1