Revert "interconnect: Fix locking for runpm vs reclaim"

This reverts commit ee42bfc791aa3cd78e29046f26a09d189beb3efb which is
commit af42269c3523492d71ebbe11fefae2653e9cdc78 upstream.

It is reported to cause boot crashes in Android systems, so revert it
from the stable trees for now.

Cc: Rob Clark <robdclark@chromium.org>
Cc: Georgi Djakov <djakov@kernel.org>
Cc: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c
index 1d9494f64a21574db4b174a955fc26819f12b2fd..87f380e0e982e43b28d642b378c1ac46e58a1b2a 100644 (file)
--- a/drivers/interconnect/core.c
+++ b/drivers/interconnect/core.c
@@ -29,7 +29,6 @@ static LIST_HEAD(icc_providers);
 static int providers_count;
 static bool synced_state;
 static DEFINE_MUTEX(icc_lock);
-static DEFINE_MUTEX(icc_bw_lock);
 static struct dentry *icc_debugfs_dir;
 
 static void icc_summary_show_one(struct seq_file *s, struct icc_node *n)
@@ -636,7 +635,7 @@ int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw)
        if (WARN_ON(IS_ERR(path) || !path->num_nodes))
                return -EINVAL;
 
-       mutex_lock(&icc_bw_lock);
+       mutex_lock(&icc_lock);
 
        old_avg = path->reqs[0].avg_bw;
        old_peak = path->reqs[0].peak_bw;
@@ -668,7 +667,7 @@ int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw)
                apply_constraints(path);
        }
 
-       mutex_unlock(&icc_bw_lock);
+       mutex_unlock(&icc_lock);
 
        trace_icc_set_bw_end(path, ret);
 
@@ -971,7 +970,6 @@ void icc_node_add(struct icc_node *node, struct icc_provider *provider)
                return;
 
        mutex_lock(&icc_lock);
-       mutex_lock(&icc_bw_lock);
 
        node->provider = provider;
        list_add_tail(&node->node_list, &provider->nodes);
@@ -997,7 +995,6 @@ void icc_node_add(struct icc_node *node, struct icc_provider *provider)
        node->avg_bw = 0;
        node->peak_bw = 0;
 
-       mutex_unlock(&icc_bw_lock);
        mutex_unlock(&icc_lock);
 }
 EXPORT_SYMBOL_GPL(icc_node_add);
@@ -1137,7 +1134,6 @@ void icc_sync_state(struct device *dev)
                return;
 
        mutex_lock(&icc_lock);
-       mutex_lock(&icc_bw_lock);
        synced_state = true;
        list_for_each_entry(p, &icc_providers, provider_list) {
                dev_dbg(p->dev, "interconnect provider is in synced state\n");