Ask userspace to do whatever it needs to do to provide us with access to
the image storage, or to tear down the access.
Signed-off-by: Nigel Cunningham <[email protected]>
kernel/power/storage.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 58 insertions(+), 0 deletions(-)
diff --git a/kernel/power/storage.c b/kernel/power/storage.c
index b66efe2..71b8c02 100644
--- a/kernel/power/storage.c
+++ b/kernel/power/storage.c
@@ -72,3 +72,61 @@ static int usm_user_rcv_msg(struct sk_bu
return 1;
}
+int suspend_activate_storage(int force)
+{
+ int tries = 1;
+
+ if (usm_helper_data.pid == -1 || usm_ops.disabled)
+ return 0;
+
+ message_received = 0;
+ activations++;
+
+ if (activations > 1 && !force)
+ return 0;
+
+ while ((!message_received || message_received == USM_MSG_FAILED) && tries < 2) {
+ suspend_prepare_status(DONT_CLEAR_BAR, "Activate storage attempt %d.\n", tries);
+
+ init_completion(&usm_helper_data.wait_for_process);
+
+ suspend_send_netlink_message(&usm_helper_data,
+ USM_MSG_CONNECT,
+ NULL, 0);
+
+ /* Wait 2 seconds for the userspace process to make contact */
+ wait_for_completion_timeout(&usm_helper_data.wait_for_process, 2*HZ);
+
+ tries++;
+ }
+
+ return 0;
+}
+
+int suspend_deactivate_storage(int force)
+{
+ if (usm_helper_data.pid == -1 || usm_ops.disabled)
+ return 0;
+
+ message_received = 0;
+ activations--;
+
+ if (activations && !force)
+ return 0;
+
+ init_completion(&usm_helper_data.wait_for_process);
+
+ suspend_send_netlink_message(&usm_helper_data,
+ USM_MSG_DISCONNECT,
+ NULL, 0);
+
+ wait_for_completion_timeout(&usm_helper_data.wait_for_process, 2*HZ);
+
+ if (!message_received || message_received == USM_MSG_FAILED) {
+ printk("Returning failure disconnecting storage.\n");
+ return 1;
+ }
+
+ return 0;
+}
+
--
Nigel Cunningham nigel at suspend2 dot net
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