bcm27xx: remove linux 4.19 support

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 0 insertions, 197 deletions

diff --git a/target/linux/bcm27xx/patches-4.19/950-0757-cpufreq-scpi-scmi-Fix-freeing-of-dynamic-OPPs.patch b/target/linux/bcm27xx/patches-4.19/950-0757-cpufreq-scpi-scmi-Fix-freeing-of-dynamic-OPPs.patch
deleted file mode 100644
index acdb00fd48..0000000000
--- a/target/linux/bcm27xx/patches-4.19/950-0757-cpufreq-scpi-scmi-Fix-freeing-of-dynamic-OPPs.patch
+++ /dev/null
@@ -1,197 +0,0 @@
-From 84a8cbf64731568c0750137ec38091a46b81d502 Mon Sep 17 00:00:00 2001
-From: Viresh Kumar <viresh.kumar@linaro.org>
-Date: Fri, 4 Jan 2019 15:14:33 +0530
-Subject: [PATCH] cpufreq: scpi/scmi: Fix freeing of dynamic OPPs
-
-Commit 1690d8bb91e370ab772062b79bd434ce815c4729 upstream
-
-Since the commit 2a4eb7358aba "OPP: Don't remove dynamic OPPs from
-_dev_pm_opp_remove_table()", dynamically created OPP aren't
-automatically removed anymore by dev_pm_opp_cpumask_remove_table(). This
-affects the scpi and scmi cpufreq drivers which no longer free OPPs on
-failures or on invocations of the policy->exit() callback.
-
-Create a generic OPP helper dev_pm_opp_remove_all_dynamic() which can be
-called from these drivers instead of dev_pm_opp_cpumask_remove_table().
-
-In dev_pm_opp_remove_all_dynamic(), we need to make sure that the
-opp_list isn't getting accessed simultaneously from other parts of the
-OPP core while the helper is freeing dynamic OPPs, i.e. we can't drop
-the opp_table->lock while traversing through the OPP list. And to
-accomplish that, this patch also creates _opp_kref_release_unlocked()
-which can be called from this new helper with the opp_table lock already
-held.
-
-Cc: 4.20 <stable@vger.kernel.org> # v4.20
-Reported-by: Valentin Schneider <valentin.schneider@arm.com>
-Fixes: 2a4eb7358aba "OPP: Don't remove dynamic OPPs from _dev_pm_opp_remove_table()"
-Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
-Tested-by: Valentin Schneider <valentin.schneider@arm.com>
-Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
-Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
----
- drivers/cpufreq/scmi-cpufreq.c |  4 +--
- drivers/cpufreq/scpi-cpufreq.c |  4 +--
- drivers/opp/core.c             | 63 +++++++++++++++++++++++++++++++---
- include/linux/pm_opp.h         |  5 +++
- 4 files changed, 67 insertions(+), 9 deletions(-)
-
---- a/drivers/cpufreq/scmi-cpufreq.c
-+++ b/drivers/cpufreq/scmi-cpufreq.c
-@@ -176,7 +176,7 @@ static int scmi_cpufreq_init(struct cpuf
- out_free_priv:
- 	kfree(priv);
- out_free_opp:
--	dev_pm_opp_cpumask_remove_table(policy->cpus);
-+	dev_pm_opp_remove_all_dynamic(cpu_dev);
- 
- 	return ret;
- }
-@@ -188,7 +188,7 @@ static int scmi_cpufreq_exit(struct cpuf
- 	cpufreq_cooling_unregister(priv->cdev);
- 	dev_pm_opp_free_cpufreq_table(priv->cpu_dev, &policy->freq_table);
- 	kfree(priv);
--	dev_pm_opp_cpumask_remove_table(policy->related_cpus);
-+	dev_pm_opp_remove_all_dynamic(priv->cpu_dev);
- 
- 	return 0;
- }
---- a/drivers/cpufreq/scpi-cpufreq.c
-+++ b/drivers/cpufreq/scpi-cpufreq.c
-@@ -177,7 +177,7 @@ out_free_cpufreq_table:
- out_free_priv:
- 	kfree(priv);
- out_free_opp:
--	dev_pm_opp_cpumask_remove_table(policy->cpus);
-+	dev_pm_opp_remove_all_dynamic(cpu_dev);
- 
- 	return ret;
- }
-@@ -190,7 +190,7 @@ static int scpi_cpufreq_exit(struct cpuf
- 	clk_put(priv->clk);
- 	dev_pm_opp_free_cpufreq_table(priv->cpu_dev, &policy->freq_table);
- 	kfree(priv);
--	dev_pm_opp_cpumask_remove_table(policy->related_cpus);
-+	dev_pm_opp_remove_all_dynamic(priv->cpu_dev);
- 
- 	return 0;
- }
---- a/drivers/opp/core.c
-+++ b/drivers/opp/core.c
-@@ -884,11 +884,9 @@ void _opp_free(struct dev_pm_opp *opp)
- 	kfree(opp);
- }
- 
--static void _opp_kref_release(struct kref *kref)
-+static void _opp_kref_release(struct dev_pm_opp *opp,
-+			      struct opp_table *opp_table)
- {
--	struct dev_pm_opp *opp = container_of(kref, struct dev_pm_opp, kref);
--	struct opp_table *opp_table = opp->opp_table;
--
- 	/*
- 	 * Notify the changes in the availability of the operable
- 	 * frequency/voltage list.
-@@ -897,7 +895,22 @@ static void _opp_kref_release(struct kre
- 	opp_debug_remove_one(opp);
- 	list_del(&opp->node);
- 	kfree(opp);
-+}
-+
-+static void _opp_kref_release_unlocked(struct kref *kref)
-+{
-+	struct dev_pm_opp *opp = container_of(kref, struct dev_pm_opp, kref);
-+	struct opp_table *opp_table = opp->opp_table;
-+
-+	_opp_kref_release(opp, opp_table);
-+}
- 
-+static void _opp_kref_release_locked(struct kref *kref)
-+{
-+	struct dev_pm_opp *opp = container_of(kref, struct dev_pm_opp, kref);
-+	struct opp_table *opp_table = opp->opp_table;
-+
-+	_opp_kref_release(opp, opp_table);
- 	mutex_unlock(&opp_table->lock);
- 	dev_pm_opp_put_opp_table(opp_table);
- }
-@@ -909,10 +922,16 @@ void dev_pm_opp_get(struct dev_pm_opp *o
- 
- void dev_pm_opp_put(struct dev_pm_opp *opp)
- {
--	kref_put_mutex(&opp->kref, _opp_kref_release, &opp->opp_table->lock);
-+	kref_put_mutex(&opp->kref, _opp_kref_release_locked,
-+		       &opp->opp_table->lock);
- }
- EXPORT_SYMBOL_GPL(dev_pm_opp_put);
- 
-+static void dev_pm_opp_put_unlocked(struct dev_pm_opp *opp)
-+{
-+	kref_put(&opp->kref, _opp_kref_release_unlocked);
-+}
-+
- /**
-  * dev_pm_opp_remove()  - Remove an OPP from OPP table
-  * @dev:	device for which we do this operation
-@@ -952,6 +971,40 @@ void dev_pm_opp_remove(struct device *de
- }
- EXPORT_SYMBOL_GPL(dev_pm_opp_remove);
- 
-+/**
-+ * dev_pm_opp_remove_all_dynamic() - Remove all dynamically created OPPs
-+ * @dev:	device for which we do this operation
-+ *
-+ * This function removes all dynamically created OPPs from the opp table.
-+ */
-+void dev_pm_opp_remove_all_dynamic(struct device *dev)
-+{
-+	struct opp_table *opp_table;
-+	struct dev_pm_opp *opp, *temp;
-+	int count = 0;
-+
-+	opp_table = _find_opp_table(dev);
-+	if (IS_ERR(opp_table))
-+		return;
-+
-+	mutex_lock(&opp_table->lock);
-+	list_for_each_entry_safe(opp, temp, &opp_table->opp_list, node) {
-+		if (opp->dynamic) {
-+			dev_pm_opp_put_unlocked(opp);
-+			count++;
-+		}
-+	}
-+	mutex_unlock(&opp_table->lock);
-+
-+	/* Drop the references taken by dev_pm_opp_add() */
-+	while (count--)
-+		dev_pm_opp_put_opp_table(opp_table);
-+
-+	/* Drop the reference taken by _find_opp_table() */
-+	dev_pm_opp_put_opp_table(opp_table);
-+}
-+EXPORT_SYMBOL_GPL(dev_pm_opp_remove_all_dynamic);
-+
- struct dev_pm_opp *_opp_allocate(struct opp_table *table)
- {
- 	struct dev_pm_opp *opp;
---- a/include/linux/pm_opp.h
-+++ b/include/linux/pm_opp.h
-@@ -107,6 +107,7 @@ void dev_pm_opp_put(struct dev_pm_opp *o
- int dev_pm_opp_add(struct device *dev, unsigned long freq,
- 		   unsigned long u_volt);
- void dev_pm_opp_remove(struct device *dev, unsigned long freq);
-+void dev_pm_opp_remove_all_dynamic(struct device *dev);
- 
- int dev_pm_opp_enable(struct device *dev, unsigned long freq);
- 
-@@ -208,6 +209,10 @@ static inline void dev_pm_opp_remove(str
- {
- }
- 
-+static inline void dev_pm_opp_remove_all_dynamic(struct device *dev)
-+{
-+}
-+
- static inline int dev_pm_opp_enable(struct device *dev, unsigned long freq)
- {
- 	return 0;