staging: vc04_services: Get rid of unused suspend/resume states

It's impossible to get into them, so simply delete them.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Link: https://lore.kernel.org/r/20200131103836.14312-16-nsaenzjulienne@suse.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
index f662806..db7ae20 100644 (file)
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
@@ -50,20 +50,13 @@ int vchiq_susp_log_level = VCHIQ_LOG_ERROR;
 
 #define VC_SUSPEND_NUM_OFFSET 3 /* number of values before idle which are -ve */
 static const char *const suspend_state_names[] = {
-       "VC_SUSPEND_FORCE_CANCELED",
-       "VC_SUSPEND_REJECTED",
-       "VC_SUSPEND_FAILED",
        "VC_SUSPEND_IDLE",
-       "VC_SUSPEND_REQUESTED",
        "VC_SUSPEND_IN_PROGRESS",
-       "VC_SUSPEND_SUSPENDED"
 };
 #define VC_RESUME_NUM_OFFSET 1 /* number of values before idle which are -ve */
 static const char *const resume_state_names[] = {
-       "VC_RESUME_FAILED",
        "VC_RESUME_IDLE",
        "VC_RESUME_REQUESTED",
-       "VC_RESUME_IN_PROGRESS",
        "VC_RESUME_RESUMED"
 };
 /* The number of times we allow force suspend to timeout before actually
@@ -2396,18 +2389,6 @@ vchiq_arm_init_state(struct vchiq_state *state,
 **                     before resuming can occur.  We therefore also reset the
 **                     resume state machine to VC_RESUME_IDLE in this state.
 **
-** VC_SUSPEND_SUSPENDED - Suspend has completed successfully. Also call
-**                     complete_all on the suspend completion to notify
-**                     anything waiting for suspend to happen.
-**
-** VC_SUSPEND_REJECTED - Videocore rejected suspend. Videocore will also
-**                     initiate resume, so no need to alter resume state.
-**                     We call complete_all on the suspend completion to notify
-**                     of suspend rejection.
-**
-** VC_SUSPEND_FAILED - We failed to initiate videocore suspend.  We notify the
-**                     suspend completion and reset the resume state machine.
-**
 ** VC_RESUME_IDLE - Initialise the resume completion at the same time.  The
 **                     resume completion is in it's 'done' state whenever
 **                     videcore is running.  Therefore, the VC_RESUME_IDLE
@@ -2415,13 +2396,6 @@ vchiq_arm_init_state(struct vchiq_state *state,
 **                     Hence, any thread which needs to wait until videocore is
 **                     running can wait on this completion - it will only block
 **                     if videocore is suspended.
-**
-** VC_RESUME_RESUMED - Resume has completed successfully.  Videocore is running.
-**                     Call complete_all on the resume completion to unblock
-**                     any threads waiting for resume.  Also reset the suspend
-**                     state machine to it's idle state.
-**
-** VC_RESUME_FAILED - Currently unused - no mechanism to fail resume exists.
 */
 
 void
@@ -2433,23 +2407,11 @@ set_suspend_state(struct vchiq_arm_state *arm_state,
 
        /* state specific additional actions */
        switch (new_state) {
-       case VC_SUSPEND_FORCE_CANCELED:
-               break;
-       case VC_SUSPEND_REJECTED:
-               break;
-       case VC_SUSPEND_FAILED:
-               arm_state->vc_resume_state = VC_RESUME_RESUMED;
-               complete_all(&arm_state->vc_resume_complete);
-               break;
        case VC_SUSPEND_IDLE:
                break;
-       case VC_SUSPEND_REQUESTED:
-               break;
        case VC_SUSPEND_IN_PROGRESS:
                set_resume_state(arm_state, VC_RESUME_IDLE);
                break;
-       case VC_SUSPEND_SUSPENDED:
-               break;
        default:
                BUG();
                break;
@@ -2465,15 +2427,11 @@ set_resume_state(struct vchiq_arm_state *arm_state,
 
        /* state specific additional actions */
        switch (new_state) {
-       case VC_RESUME_FAILED:
-               break;
        case VC_RESUME_IDLE:
                reinit_completion(&arm_state->vc_resume_complete);
                break;
        case VC_RESUME_REQUESTED:
                break;
-       case VC_RESUME_IN_PROGRESS:
-               break;
        case VC_RESUME_RESUMED:
                complete_all(&arm_state->vc_resume_complete);
                set_suspend_state(arm_state, VC_SUSPEND_IDLE);
@@ -2503,12 +2461,6 @@ vchiq_platform_check_suspend(struct vchiq_state *state)
 
        vchiq_log_trace(vchiq_susp_log_level, "%s", __func__);
 
-       write_lock_bh(&arm_state->susp_res_lock);
-       if (arm_state->vc_suspend_state == VC_SUSPEND_REQUESTED &&
-                       arm_state->vc_resume_state == VC_RESUME_RESUMED)
-               set_suspend_state(arm_state, VC_SUSPEND_IN_PROGRESS);
-       write_unlock_bh(&arm_state->susp_res_lock);
-
 out:
        vchiq_log_trace(vchiq_susp_log_level, "%s exit", __func__);
        return;
@@ -2548,13 +2500,6 @@ vchiq_use_internal(struct vchiq_state *state, struct vchiq_service *service,
        local_uc = ++arm_state->videocore_use_count;
        local_entity_uc = ++(*entity_uc);
 
-       /* If there's a pending request which hasn't yet been serviced then
-        * just clear it.  If we're past VC_SUSPEND_REQUESTED state then
-        * vc_resume_complete will block until we either resume or fail to
-        * suspend */
-       if (arm_state->vc_suspend_state <= VC_SUSPEND_REQUESTED)
-               set_suspend_state(arm_state, VC_SUSPEND_IDLE);
-
        if ((use_type != USE_TYPE_SERVICE_NO_RESUME) && need_resume(state)) {
                set_resume_state(arm_state, VC_RESUME_REQUESTED);
                vchiq_log_info(vchiq_susp_log_level,

diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.h b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.h
index aa081d6..afd8225 100644 (file)
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.h
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.h
@@ -15,20 +15,13 @@
 #include "vchiq_debugfs.h"
 
 enum vc_suspend_status {
-       VC_SUSPEND_FORCE_CANCELED = -3, /* Force suspend canceled, too busy */
-       VC_SUSPEND_REJECTED = -2,  /* Videocore rejected suspend request */
-       VC_SUSPEND_FAILED = -1,    /* Videocore suspend failed */
        VC_SUSPEND_IDLE = 0,       /* VC active, no suspend actions */
-       VC_SUSPEND_REQUESTED,      /* User has requested suspend */
        VC_SUSPEND_IN_PROGRESS,    /* Slot handler has recvd suspend request */
-       VC_SUSPEND_SUSPENDED       /* Videocore suspend succeeded */
 };
 
 enum vc_resume_status {
-       VC_RESUME_FAILED = -1, /* Videocore resume failed */
        VC_RESUME_IDLE = 0,    /* VC suspended, no resume actions */
        VC_RESUME_REQUESTED,   /* User has requested resume */
-       VC_RESUME_IN_PROGRESS, /* Slot handler has received resume request */
        VC_RESUME_RESUMED      /* Videocore resumed successfully (active) */
 };