PM: video drivers and PM_EVENT_PRETHAW

Video drivers which explicitly test for messages reporting PM_EVENT_FREEZE
will now handle PM_EVENT_PRETHAW the same way.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

4 files changed, 30 insertions, 24 deletions

diff --git a/drivers/video/aty/radeon_pm.c b/drivers/video/aty/radeon_pm.c
index e308ed2d249a..365de5dcc888 100644
--- a/drivers/video/aty/radeon_pm.c
+++ b/drivers/video/aty/radeon_pm.c
@@ -2621,25 +2621,28 @@ static int radeon_restore_pci_cfg(struct radeonfb_info *rinfo)
 }
 
 
-int radeonfb_pci_suspend(struct pci_dev *pdev, pm_message_t state)
+int radeonfb_pci_suspend(struct pci_dev *pdev, pm_message_t mesg)
 {
         struct fb_info *info = pci_get_drvdata(pdev);
         struct radeonfb_info *rinfo = info->par;
         int i;
 
-        if (state.event == pdev->dev.power.power_state.event)
+        if (mesg.event == pdev->dev.power.power_state.event)
                 return 0;
 
-        printk(KERN_DEBUG "radeonfb (%s): suspending to state: %d...\n",
-               pci_name(pdev), state.event);
+        printk(KERN_DEBUG "radeonfb (%s): suspending for event: %d...\n",
+               pci_name(pdev), mesg.event);
 
         /* For suspend-to-disk, we cheat here. We don't suspend anything and
          * let fbcon continue drawing until we are all set. That shouldn't
          * really cause any problem at this point, provided that the wakeup
          * code knows that any state in memory may not match the HW
          */
-        if (state.event == PM_EVENT_FREEZE)
+        switch (mesg.event) {
+        case PM_EVENT_FREEZE:           /* about to take snapshot */
+        case PM_EVENT_PRETHAW:          /* before restoring snapshot */
                 goto done;
+        }
 
         acquire_console_sem();
 
@@ -2706,7 +2709,7 @@ int radeonfb_pci_suspend(struct pci_dev *pdev, pm_message_t state)
         release_console_sem();
 
  done:
-        pdev->dev.power.power_state = state;
+        pdev->dev.power.power_state = mesg;
 
         return 0;
 }
diff --git a/drivers/video/i810/i810_main.c b/drivers/video/i810/i810_main.c
index a6ca02f2156a..d42edaccb84c 100644
--- a/drivers/video/i810/i810_main.c
+++ b/drivers/video/i810/i810_main.c
@@ -1554,15 +1554,17 @@ static struct fb_ops i810fb_ops __devinitdata = {
 /***********************************************************************
  *                         Power Management                            *
  ***********************************************************************/
-static int i810fb_suspend(struct pci_dev *dev, pm_message_t state)
+static int i810fb_suspend(struct pci_dev *dev, pm_message_t mesg)
 {
         struct fb_info *info = pci_get_drvdata(dev);
         struct i810fb_par *par = info->par;
 
-        par->cur_state = state.event;
+        par->cur_state = mesg.event;
 
-        if (state.event == PM_EVENT_FREEZE) {
-                dev->dev.power.power_state = state;
+        switch (mesg.event) {
+        case PM_EVENT_FREEZE:
+        case PM_EVENT_PRETHAW:
+                dev->dev.power.power_state = mesg;
                 return 0;
         }
 
@@ -1578,7 +1580,7 @@ static int i810fb_suspend(struct pci_dev *dev, pm_message_t state)
 
         pci_save_state(dev);
         pci_disable_device(dev);
-        pci_set_power_state(dev, pci_choose_state(dev, state));
+        pci_set_power_state(dev, pci_choose_state(dev, mesg));
         release_console_sem();
 
         return 0;
diff --git a/drivers/video/nvidia/nvidia.c b/drivers/video/nvidia/nvidia.c
index d4f850117874..f8cd4c519aeb 100644
--- a/drivers/video/nvidia/nvidia.c
+++ b/drivers/video/nvidia/nvidia.c
@@ -950,24 +950,25 @@ static struct fb_ops nvidia_fb_ops = {
 };
 
 #ifdef CONFIG_PM
-static int nvidiafb_suspend(struct pci_dev *dev, pm_message_t state)
+static int nvidiafb_suspend(struct pci_dev *dev, pm_message_t mesg)
 {
         struct fb_info *info = pci_get_drvdata(dev);
         struct nvidia_par *par = info->par;
 
+        if (mesg.event == PM_EVENT_PRETHAW)
+                mesg.event = PM_EVENT_FREEZE;
         acquire_console_sem();
-        par->pm_state = state.event;
+        par->pm_state = mesg.event;
 
-        if (state.event == PM_EVENT_FREEZE) {
-                dev->dev.power.power_state = state;
-        } else {
+        if (mesg.event == PM_EVENT_SUSPEND) {
                 fb_set_suspend(info, 1);
                 nvidiafb_blank(FB_BLANK_POWERDOWN, info);
                 nvidia_write_regs(par, &par->SavedReg);
                 pci_save_state(dev);
                 pci_disable_device(dev);
-                pci_set_power_state(dev, pci_choose_state(dev, state));
+                pci_set_power_state(dev, pci_choose_state(dev, mesg));
         }
+        dev->dev.power.power_state = mesg;
 
         release_console_sem();
         return 0;
diff --git a/drivers/video/savage/savagefb_driver.c b/drivers/video/savage/savagefb_driver.c
index 461e094e7b45..82b3deaae02d 100644
--- a/drivers/video/savage/savagefb_driver.c
+++ b/drivers/video/savage/savagefb_driver.c
@@ -2323,24 +2323,24 @@ static void __devexit savagefb_remove(struct pci_dev *dev)
         }
 }
 
-static int savagefb_suspend(struct pci_dev* dev, pm_message_t state)
+static int savagefb_suspend(struct pci_dev *dev, pm_message_t mesg)
 {
         struct fb_info *info = pci_get_drvdata(dev);
         struct savagefb_par *par = info->par;
 
         DBG("savagefb_suspend");
 
-
-        par->pm_state = state.event;
+        if (mesg.event == PM_EVENT_PRETHAW)
+                mesg.event = PM_EVENT_FREEZE;
+        par->pm_state = mesg.event;
+        dev->dev.power.power_state = mesg;
 
         /*
          * For PM_EVENT_FREEZE, do not power down so the console
          * can remain active.
          */
-        if (state.event == PM_EVENT_FREEZE) {
-                dev->dev.power.power_state = state;
+        if (mesg.event == PM_EVENT_FREEZE)
                 return 0;
-        }
 
         acquire_console_sem();
         fb_set_suspend(info, 1);
@@ -2353,7 +2353,7 @@ static int savagefb_suspend(struct pci_dev* dev, pm_message_t state)
         savage_disable_mmio(par);
         pci_save_state(dev);
         pci_disable_device(dev);
-        pci_set_power_state(dev, pci_choose_state(dev, state));
+        pci_set_power_state(dev, pci_choose_state(dev, mesg));
         release_console_sem();
 
         return 0;