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Message-Id: <20180627125056.12851-1-vivek.gautam@codeaurora.org>
Date: Wed, 27 Jun 2018 18:20:55 +0530
From: Vivek Gautam <vivek.gautam@...eaurora.org>
To: rjw@...ysocki.net, linux-kernel@...r.kernel.org
Cc: Vivek Gautam <vivek.gautam@...eaurora.org>,
Lukas Wunner <lukas@...ner.de>,
Jonathan Corbet <corbet@....net>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Thierry Reding <thierry.reding@...il.com>,
David Airlie <airlied@...ux.ie>,
Jonathan Hunter <jonathanh@...dia.com>,
Philipp Zabel <p.zabel@...gutronix.de>,
Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <kernel@...gutronix.de>,
Robin Murphy <robin.murphy@....com>, linux-doc@...r.kernel.org,
dri-devel@...ts.freedesktop.org, linux-tegra@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-pm@...r.kernel.org,
linux-arm-msm@...r.kernel.org
Subject: [PATCH 1/2] device core: Rename flag AUTOREMOVE to AUTOREMOVE_CONSUMER
Now that we want to add another flag to autoremove the device link
on supplier unbind, it's fair to rename the existing flag from
DL_FLAG_AUTOREMOVE to DL_FLAG_AUTOREMOVE_CONSUMER so that we can
add similar flag for supplier later.
And, while we are touching device.h, fix a doc build warning.
Signed-off-by: Vivek Gautam <vivek.gautam@...eaurora.org>
Cc: Lukas Wunner <lukas@...ner.de>
Cc: Jonathan Corbet <corbet@....net>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Thierry Reding <thierry.reding@...il.com>
Cc: David Airlie <airlied@...ux.ie>
Cc: Jonathan Hunter <jonathanh@...dia.com>
Cc: Philipp Zabel <p.zabel@...gutronix.de>
Cc: Shawn Guo <shawnguo@...nel.org>
Cc: Sascha Hauer <kernel@...gutronix.de>
Cc: Robin Murphy <robin.murphy@....com>
Cc: linux-doc@...r.kernel.org
Cc: dri-devel@...ts.freedesktop.org
Cc: linux-tegra@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-pm@...r.kernel.org
Cc: linux-arm-msm@...r.kernel.org
---
Documentation/driver-api/device_link.rst | 8 ++++----
drivers/base/core.c | 15 ++++++++-------
drivers/gpu/drm/tegra/dc.c | 2 +-
drivers/gpu/ipu-v3/ipu-pre.c | 3 ++-
drivers/gpu/ipu-v3/ipu-prg.c | 3 ++-
drivers/soc/imx/gpc.c | 2 +-
include/linux/device.h | 12 ++++++------
7 files changed, 24 insertions(+), 21 deletions(-)
diff --git a/Documentation/driver-api/device_link.rst b/Documentation/driver-api/device_link.rst
index 70e328e16aad..a005b904a264 100644
--- a/Documentation/driver-api/device_link.rst
+++ b/Documentation/driver-api/device_link.rst
@@ -81,10 +81,10 @@ integration is desired.
Two other flags are specifically targeted at use cases where the device
link is added from the consumer's ``->probe`` callback: ``DL_FLAG_RPM_ACTIVE``
can be specified to runtime resume the supplier upon addition of the
-device link. ``DL_FLAG_AUTOREMOVE`` causes the device link to be automatically
-purged when the consumer fails to probe or later unbinds. This obviates
-the need to explicitly delete the link in the ``->remove`` callback or in
-the error path of the ``->probe`` callback.
+device link. ``DL_FLAG_AUTOREMOVE_CONSUMER`` causes the device link to be
+automatically purged when the consumer fails to probe or later unbinds.
+This obviates the need to explicitly delete the link in the ``->remove``
+callback or in the error path of the ``->probe`` callback.
Limitations
===========
diff --git a/drivers/base/core.c b/drivers/base/core.c
index df3e1a44707a..14c1e3151e08 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -178,10 +178,10 @@ void device_pm_move_to_tail(struct device *dev)
* of the link. If DL_FLAG_PM_RUNTIME is not set, DL_FLAG_RPM_ACTIVE will be
* ignored.
*
- * If the DL_FLAG_AUTOREMOVE is set, the link will be removed automatically
- * when the consumer device driver unbinds from it. The combination of both
- * DL_FLAG_AUTOREMOVE and DL_FLAG_STATELESS set is invalid and will cause NULL
- * to be returned.
+ * If the DL_FLAG_AUTOREMOVE_CONSUMER is set, the link will be removed
+ * automatically when the consumer device driver unbinds from it.
+ * The combination of both DL_FLAG_AUTOREMOVE_CONSUMER and DL_FLAG_STATELESS
+ * set is invalid and will cause NULL to be returned.
*
* A side effect of the link creation is re-ordering of dpm_list and the
* devices_kset list by moving the consumer device and all devices depending
@@ -198,7 +198,8 @@ struct device_link *device_link_add(struct device *consumer,
struct device_link *link;
if (!consumer || !supplier ||
- ((flags & DL_FLAG_STATELESS) && (flags & DL_FLAG_AUTOREMOVE)))
+ ((flags & DL_FLAG_STATELESS) &&
+ (flags & DL_FLAG_AUTOREMOVE_CONSUMER)))
return NULL;
device_links_write_lock();
@@ -479,7 +480,7 @@ static void __device_links_no_driver(struct device *dev)
if (link->flags & DL_FLAG_STATELESS)
continue;
- if (link->flags & DL_FLAG_AUTOREMOVE)
+ if (link->flags & DL_FLAG_AUTOREMOVE_CONSUMER)
kref_put(&link->kref, __device_link_del);
else if (link->status != DL_STATE_SUPPLIER_UNBIND)
WRITE_ONCE(link->status, DL_STATE_AVAILABLE);
@@ -515,7 +516,7 @@ void device_links_driver_cleanup(struct device *dev)
if (link->flags & DL_FLAG_STATELESS)
continue;
- WARN_ON(link->flags & DL_FLAG_AUTOREMOVE);
+ WARN_ON(link->flags & DL_FLAG_AUTOREMOVE_CONSUMER);
WARN_ON(link->status != DL_STATE_SUPPLIER_UNBIND);
WRITE_ONCE(link->status, DL_STATE_DORMANT);
}
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index c3afe7b2237e..965088afcfad 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -2312,7 +2312,7 @@ static int tegra_dc_couple(struct tegra_dc *dc)
* POWER_CONTROL registers during CRTC enabling.
*/
if (dc->soc->coupled_pm && dc->pipe == 1) {
- u32 flags = DL_FLAG_PM_RUNTIME | DL_FLAG_AUTOREMOVE;
+ u32 flags = DL_FLAG_PM_RUNTIME | DL_FLAG_AUTOREMOVE_CONSUMER;
struct device_link *link;
struct device *partner;
diff --git a/drivers/gpu/ipu-v3/ipu-pre.c b/drivers/gpu/ipu-v3/ipu-pre.c
index 0f70e8847540..2f8db9d62551 100644
--- a/drivers/gpu/ipu-v3/ipu-pre.c
+++ b/drivers/gpu/ipu-v3/ipu-pre.c
@@ -128,7 +128,8 @@ ipu_pre_lookup_by_phandle(struct device *dev, const char *name, int index)
list_for_each_entry(pre, &ipu_pre_list, list) {
if (pre_node == pre->dev->of_node) {
mutex_unlock(&ipu_pre_list_mutex);
- device_link_add(dev, pre->dev, DL_FLAG_AUTOREMOVE);
+ device_link_add(dev, pre->dev,
+ DL_FLAG_AUTOREMOVE_CONSUMER);
of_node_put(pre_node);
return pre;
}
diff --git a/drivers/gpu/ipu-v3/ipu-prg.c b/drivers/gpu/ipu-v3/ipu-prg.c
index 83f9dd934a5d..38a3a9764e49 100644
--- a/drivers/gpu/ipu-v3/ipu-prg.c
+++ b/drivers/gpu/ipu-v3/ipu-prg.c
@@ -100,7 +100,8 @@ ipu_prg_lookup_by_phandle(struct device *dev, const char *name, int ipu_id)
list_for_each_entry(prg, &ipu_prg_list, list) {
if (prg_node == prg->dev->of_node) {
mutex_unlock(&ipu_prg_list_mutex);
- device_link_add(dev, prg->dev, DL_FLAG_AUTOREMOVE);
+ device_link_add(dev, prg->dev,
+ DL_FLAG_AUTOREMOVE_CONSUMER);
prg->id = ipu_id;
of_node_put(prg_node);
return prg;
diff --git a/drivers/soc/imx/gpc.c b/drivers/soc/imx/gpc.c
index 32f0748fd067..aa9e65bc965e 100644
--- a/drivers/soc/imx/gpc.c
+++ b/drivers/soc/imx/gpc.c
@@ -202,7 +202,7 @@ static int imx_pgc_power_domain_probe(struct platform_device *pdev)
goto genpd_err;
}
- device_link_add(dev, dev->parent, DL_FLAG_AUTOREMOVE);
+ device_link_add(dev, dev->parent, DL_FLAG_AUTOREMOVE_CONSUMER);
return 0;
diff --git a/include/linux/device.h b/include/linux/device.h
index 055a69dbcd18..3929805cdd59 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -90,7 +90,7 @@ extern void bus_remove_file(struct bus_type *, struct bus_attribute *);
* @num_vf: Called to find out how many virtual functions a device on this
* bus supports.
* @dma_configure: Called to setup DMA configuration on a device on
- this bus.
+ * this bus.
* @pm: Power management operations of this bus, callback the specific
* device driver's pm-ops.
* @iommu_ops: IOMMU specific operations for this bus, used to attach IOMMU
@@ -784,14 +784,14 @@ enum device_link_state {
* Device link flags.
*
* STATELESS: The core won't track the presence of supplier/consumer drivers.
- * AUTOREMOVE: Remove this link automatically on consumer driver unbind.
+ * AUTOREMOVE_CONSUMER: Remove the link automatically on consumer driver unbind.
* PM_RUNTIME: If set, the runtime PM framework will use this link.
* RPM_ACTIVE: Run pm_runtime_get_sync() on the supplier during link creation.
*/
-#define DL_FLAG_STATELESS BIT(0)
-#define DL_FLAG_AUTOREMOVE BIT(1)
-#define DL_FLAG_PM_RUNTIME BIT(2)
-#define DL_FLAG_RPM_ACTIVE BIT(3)
+#define DL_FLAG_STATELESS BIT(0)
+#define DL_FLAG_AUTOREMOVE_CONSUMER BIT(1)
+#define DL_FLAG_PM_RUNTIME BIT(2)
+#define DL_FLAG_RPM_ACTIVE BIT(3)
/**
* struct device_link - Device link representation.
--
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