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From: Mika Westerberg <mika.westerberg@linux.intel.com>
To: linux-kernel@vger.kernel.org
Cc: Andreas Noever <andreas.noever@gmail.com>,
	Michael Jamet <michael.jamet@intel.com>,
	Yehezkel Bernat <YehezkelShB@gmail.com>,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	Len Brown <lenb@kernel.org>, Lukas Wunner <lukas@wunner.de>,
	Mario.Limonciello@dell.com,
	Anthony Wong <anthony.wong@canonical.com>,
	Rajmohan Mani <rajmohan.mani@intel.com>,
	Raanan Avargil <raanan.avargil@intel.com>,
	David Laight <David.Laight@ACULAB.COM>,
	Mika Westerberg <mika.westerberg@linux.intel.com>,
	linux-acpi@vger.kernel.org
Subject: [PATCH v3 5/8] thunderbolt: Hide switch attributes that are not set
Date: Mon, 19 Aug 2019 14:22:20 +0300
Message-ID: <20190819112223.15359-6-mika.westerberg@linux.intel.com> (raw)
In-Reply-To: <20190819112223.15359-1-mika.westerberg@linux.intel.com>

Thunderbolt host routers may not always contain DROM that includes
device identification information. This is mostly needed for Ice Lake
systems but some Falcon Ridge controllers on PCs also do not have DROM.

In that case hide the identification attributes.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Yehezkel Bernat <YehezkelShB@gmail.com>
---
 drivers/thunderbolt/switch.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index 64f845fe4690..bd3eaaf34ea1 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -1337,7 +1337,19 @@ static umode_t switch_attr_is_visible(struct kobject *kobj,
 	struct device *dev = container_of(kobj, struct device, kobj);
 	struct tb_switch *sw = tb_to_switch(dev);
 
-	if (attr == &dev_attr_key.attr) {
+	if (attr == &dev_attr_device.attr) {
+		if (!sw->device)
+			return 0;
+	} else if (attr == &dev_attr_device_name.attr) {
+		if (!sw->device_name)
+			return 0;
+	} else if (attr == &dev_attr_vendor.attr)  {
+		if (!sw->vendor)
+			return 0;
+	} else if (attr == &dev_attr_vendor_name.attr)  {
+		if (!sw->vendor_name)
+			return 0;
+	} else if (attr == &dev_attr_key.attr) {
 		if (tb_route(sw) &&
 		    sw->tb->security_level == TB_SECURITY_SECURE &&
 		    sw->security_level == TB_SECURITY_SECURE)
-- 
2.23.0.rc1


  parent reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-19 11:22 [PATCH v3 0/8] thunderbolt: Intel Ice Lake support Mika Westerberg
2019-08-19 11:22 ` [PATCH v3 1/8] thunderbolt: Correct path indices for PCIe tunnel Mika Westerberg
2019-08-19 11:22 ` [PATCH v3 2/8] thunderbolt: Move NVM upgrade support flag to struct icm Mika Westerberg
2019-08-19 11:22 ` [PATCH v3 3/8] thunderbolt: Use 32-bit writes when writing ring producer/consumer Mika Westerberg
2019-08-19 11:22 ` [PATCH v3 4/8] thunderbolt: Do not fail adding switch if some port is not implemented Mika Westerberg
2019-08-19 11:22 ` Mika Westerberg [this message]
2019-08-19 11:22 ` [PATCH v3 6/8] thunderbolt: Expose active parts of NVM even if upgrade is not supported Mika Westerberg
2019-08-19 11:22 ` [PATCH v3 7/8] thunderbolt: Add support for Intel Ice Lake Mika Westerberg
2019-08-19 11:22 ` [PATCH v3 8/8] ACPI / property: Add two new Thunderbolt property GUIDs to the list Mika Westerberg
2019-08-19 16:29 ` [PATCH v3 0/8] thunderbolt: Intel Ice Lake support Mario.Limonciello
2019-08-19 17:57   ` Mika Westerberg
2019-08-19 18:22     ` Mario.Limonciello
2019-08-19 19:36       ` Mario.Limonciello
2019-08-20 10:01         ` Mika Westerberg
2019-08-20 11:34   ` Lukas Wunner
2019-08-20 17:00     ` Mario.Limonciello
2019-08-26  9:20 ` Mika Westerberg

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