[PATCH] swsusp: switch pm_message_t to struct

This adds type-checking to pm_message_t, so that people can't confuse it
with int or u32.  It also allows us to fix "disk yoyo" during suspend (disk
spinning down/up/down).

[We've tried that before; since that cpufreq problems were fixed and I've
tried make allyes config and fixed resulting damage.]

Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Alexander Nyberg <alexn@telia.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

5 files changed, 22 insertions, 25 deletions

diff --git a/drivers/video/aty/aty128fb.c b/drivers/video/aty/aty128fb.c
index 7bc1d44d8814..b0eba3ac6420 100644
--- a/drivers/video/aty/aty128fb.c
+++ b/drivers/video/aty/aty128fb.c
@@ -2323,17 +2323,16 @@ static int aty128_pci_suspend(struct pci_dev *pdev, pm_message_t state)
          * can properly take care of D3 ? Also, with swsusp, we
          * know we'll be rebooted, ...
          */
-#ifdef CONFIG_PPC_PMAC
+#ifndef CONFIG_PPC_PMAC
         /* HACK ALERT ! Once I find a proper way to say to each driver
          * individually what will happen with it's PCI slot, I'll change
          * that. On laptops, the AGP slot is just unclocked, so D2 is
          * expected, while on desktops, the card is powered off
          */
-        if (state >= 3)
-                state = 2;
+        return 0;
 #endif /* CONFIG_PPC_PMAC */
          
-        if (state != 2 || state == pdev->dev.power.power_state)
+        if (state.event == pdev->dev.power.power_state.event)
                 return 0;
 
         printk(KERN_DEBUG "aty128fb: suspending...\n");
@@ -2367,7 +2366,7 @@ static int aty128_pci_suspend(struct pci_dev *pdev, pm_message_t state)
          * used dummy fb ops, 2.5 need proper support for this at the
          * fbdev level
          */
-        if (state == 2)
+        if (state.event != PM_EVENT_ON)
                 aty128_set_suspend(par, 1);
 
         release_console_sem();
@@ -2382,12 +2381,11 @@ static int aty128_do_resume(struct pci_dev *pdev)
         struct fb_info *info = pci_get_drvdata(pdev);
         struct aty128fb_par *par = info->par;
 
-        if (pdev->dev.power.power_state == 0)
+        if (pdev->dev.power.power_state.event == PM_EVENT_ON)
                 return 0;
 
         /* Wakeup chip */
-        if (pdev->dev.power.power_state == 2)
-                aty128_set_suspend(par, 0);
+        aty128_set_suspend(par, 0);
         par->asleep = 0;
 
         /* Restore display & engine */
diff --git a/drivers/video/aty/atyfb_base.c b/drivers/video/aty/atyfb_base.c
index 8c42538dc8c1..3e10bd837d9e 100644
--- a/drivers/video/aty/atyfb_base.c
+++ b/drivers/video/aty/atyfb_base.c
@@ -2022,17 +2022,16 @@ static int atyfb_pci_suspend(struct pci_dev *pdev, pm_message_t state)
         struct fb_info *info = pci_get_drvdata(pdev);
         struct atyfb_par *par = (struct atyfb_par *) info->par;
 
-#ifdef CONFIG_PPC_PMAC
+#ifndef CONFIG_PPC_PMAC
         /* HACK ALERT ! Once I find a proper way to say to each driver
          * individually what will happen with it's PCI slot, I'll change
          * that. On laptops, the AGP slot is just unclocked, so D2 is
          * expected, while on desktops, the card is powered off
          */
-        if (state >= 3)
-                state = 2;
+        return 0;
 #endif /* CONFIG_PPC_PMAC */
 
-        if (state != 2 || state == pdev->dev.power.power_state)
+        if (state.event == pdev->dev.power.power_state.event)
                 return 0;
 
         acquire_console_sem();
@@ -2071,12 +2070,12 @@ static int atyfb_pci_resume(struct pci_dev *pdev)
         struct fb_info *info = pci_get_drvdata(pdev);
         struct atyfb_par *par = (struct atyfb_par *) info->par;
 
-        if (pdev->dev.power.power_state == 0)
+        if (pdev->dev.power.power_state.event == PM_EVENT_ON)
                 return 0;
 
         acquire_console_sem();
 
-        if (pdev->dev.power.power_state == 2)
+        if (pdev->dev.power.power_state.event == 2)
                 aty_power_mgmt(0, par);
         par->asleep = 0;
 
diff --git a/drivers/video/aty/radeon_pm.c b/drivers/video/aty/radeon_pm.c
index 98352af39325..59a1b6f85067 100644
--- a/drivers/video/aty/radeon_pm.c
+++ b/drivers/video/aty/radeon_pm.c
@@ -2526,18 +2526,18 @@ int radeonfb_pci_suspend(struct pci_dev *pdev, pm_message_t state)
         struct radeonfb_info *rinfo = info->par;
         int i;
 
-        if (state == pdev->dev.power.power_state)
+        if (state.event == pdev->dev.power.power_state.event)
                 return 0;
 
         printk(KERN_DEBUG "radeonfb (%s): suspending to state: %d...\n",
-               pci_name(pdev), state);
+               pci_name(pdev), state.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 != PM_SUSPEND_MEM)
+        if (state.event == PM_EVENT_FREEZE)
                 goto done;
 
         acquire_console_sem();
@@ -2616,7 +2616,7 @@ int radeonfb_pci_resume(struct pci_dev *pdev)
         struct radeonfb_info *rinfo = info->par;
         int rc = 0;
 
-        if (pdev->dev.power.power_state == 0)
+        if (pdev->dev.power.power_state.event == PM_EVENT_ON)
                 return 0;
 
         if (rinfo->no_schedule) {
@@ -2626,7 +2626,7 @@ int radeonfb_pci_resume(struct pci_dev *pdev)
                 acquire_console_sem();
 
         printk(KERN_DEBUG "radeonfb (%s): resuming from state: %d...\n",
-               pci_name(pdev), pdev->dev.power.power_state);
+               pci_name(pdev), pdev->dev.power.power_state.event);
 
 
         if (pci_enable_device(pdev)) {
@@ -2637,7 +2637,7 @@ int radeonfb_pci_resume(struct pci_dev *pdev)
         }
         pci_set_master(pdev);
 
-        if (pdev->dev.power.power_state == PM_SUSPEND_MEM) {
+        if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
                 /* Wakeup chip. Check from config space if we were powered off
                  * (todo: additionally, check CLK_PIN_CNTL too)
                  */
diff --git a/drivers/video/chipsfb.c b/drivers/video/chipsfb.c
index e75a965ec760..4131243cfdf8 100644
--- a/drivers/video/chipsfb.c
+++ b/drivers/video/chipsfb.c
@@ -462,9 +462,9 @@ static int chipsfb_pci_suspend(struct pci_dev *pdev, pm_message_t state)
 {
         struct fb_info *p = pci_get_drvdata(pdev);
 
-        if (state == pdev->dev.power.power_state)
+        if (state.event == pdev->dev.power.power_state.event)
                 return 0;
-        if (state != PM_SUSPEND_MEM)
+        if (state.event != PM_SUSPEND_MEM)
                 goto done;
 
         acquire_console_sem();
diff --git a/drivers/video/i810/i810_main.c b/drivers/video/i810/i810_main.c
index 7513fb9b19cf..6db183462b92 100644
--- a/drivers/video/i810/i810_main.c
+++ b/drivers/video/i810/i810_main.c
@@ -1506,12 +1506,12 @@ static int i810fb_suspend(struct pci_dev *dev, pm_message_t state)
         struct i810fb_par *par = (struct i810fb_par *) info->par;
         int blank = 0, prev_state = par->cur_state;
 
-        if (state == prev_state)
+        if (state.event == prev_state)
                 return 0;
 
-        par->cur_state = state;
+        par->cur_state = state.event;
 
-        switch (state) {
+        switch (state.event) {
         case 1:
                 blank = VESA_VSYNC_SUSPEND;
                 break;