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authorDavid Brownell <david-b@pacbell.net>2006-08-14 23:11:03 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2006-09-25 21:08:37 -0700
commit8b4b8a24e4e49dc9fe36d4d079f6d2c23f942b03 (patch)
treef8c2a452bff75b013182dd90996eef0aa760042c /drivers
parent8f4bcc20ee39f9c087f3532672e3e5f086e92281 (diff)
fix broken/dubious driver suspend() methods
Small driver suspend() fixes in preparation for the PRETHAW events: - Only compare message events for equality against PM_EVENT_* codes; not against integers, or using greater/less-than comparisons. (PM_EVENT_* should really become a __bitwise thing.) - Explicitly test for SUSPEND events (rather than not-something-else) before suspending devices. - Removes more of the confusion between a pm_message_t (wraps event code) and a "state" ... suspend() originally took a target system state. These updates are correct and appropriate even without new PM_EVENT codes. benh: "I think in the Mesh case, we should handle the freeze case as well or we might get wild DMA." Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Pavel Machek <pavel@ucw.cz> Cc: Greg KH <greg@kroah.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Mauro Carvalho Chehab <mchehab@infradead.org> Cc: James Bottomley <James.Bottomley@steeleye.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/ide/ppc/pmac.c14
-rw-r--r--drivers/media/dvb/cinergyT2/cinergyT2.c2
-rw-r--r--drivers/scsi/mesh.c15
3 files changed, 20 insertions, 11 deletions
diff --git a/drivers/ide/ppc/pmac.c b/drivers/ide/ppc/pmac.c
index 996c694341b..31ad79f52df 100644
--- a/drivers/ide/ppc/pmac.c
+++ b/drivers/ide/ppc/pmac.c
@@ -1369,15 +1369,16 @@ pmac_ide_macio_attach(struct macio_dev *mdev, const struct of_device_id *match)
}
static int
-pmac_ide_macio_suspend(struct macio_dev *mdev, pm_message_t state)
+pmac_ide_macio_suspend(struct macio_dev *mdev, pm_message_t mesg)
{
ide_hwif_t *hwif = (ide_hwif_t *)dev_get_drvdata(&mdev->ofdev.dev);
int rc = 0;
- if (state.event != mdev->ofdev.dev.power.power_state.event && state.event >= PM_EVENT_SUSPEND) {
+ if (mesg.event != mdev->ofdev.dev.power.power_state.event
+ && mesg.event == PM_EVENT_SUSPEND) {
rc = pmac_ide_do_suspend(hwif);
if (rc == 0)
- mdev->ofdev.dev.power.power_state = state;
+ mdev->ofdev.dev.power.power_state = mesg;
}
return rc;
@@ -1473,15 +1474,16 @@ pmac_ide_pci_attach(struct pci_dev *pdev, const struct pci_device_id *id)
}
static int
-pmac_ide_pci_suspend(struct pci_dev *pdev, pm_message_t state)
+pmac_ide_pci_suspend(struct pci_dev *pdev, pm_message_t mesg)
{
ide_hwif_t *hwif = (ide_hwif_t *)pci_get_drvdata(pdev);
int rc = 0;
- if (state.event != pdev->dev.power.power_state.event && state.event >= 2) {
+ if (mesg.event != pdev->dev.power.power_state.event
+ && mesg.event == PM_EVENT_SUSPEND) {
rc = pmac_ide_do_suspend(hwif);
if (rc == 0)
- pdev->dev.power.power_state = state;
+ pdev->dev.power.power_state = mesg;
}
return rc;
diff --git a/drivers/media/dvb/cinergyT2/cinergyT2.c b/drivers/media/dvb/cinergyT2/cinergyT2.c
index 001c71b6be6..410fa6d620f 100644
--- a/drivers/media/dvb/cinergyT2/cinergyT2.c
+++ b/drivers/media/dvb/cinergyT2/cinergyT2.c
@@ -981,7 +981,7 @@ static int cinergyt2_suspend (struct usb_interface *intf, pm_message_t state)
if (cinergyt2->disconnect_pending || mutex_lock_interruptible(&cinergyt2->sem))
return -ERESTARTSYS;
- if (state.event > PM_EVENT_ON) {
+ if (1) {
struct cinergyt2 *cinergyt2 = usb_get_intfdata (intf);
cinergyt2_suspend_rc(cinergyt2);
diff --git a/drivers/scsi/mesh.c b/drivers/scsi/mesh.c
index 592b52afe65..683fc7ae4b8 100644
--- a/drivers/scsi/mesh.c
+++ b/drivers/scsi/mesh.c
@@ -1756,16 +1756,23 @@ static void set_mesh_power(struct mesh_state *ms, int state)
pmac_call_feature(PMAC_FTR_MESH_ENABLE, macio_get_of_node(ms->mdev), 0, 0);
msleep(10);
}
-}
+}
#ifdef CONFIG_PM
-static int mesh_suspend(struct macio_dev *mdev, pm_message_t state)
+static int mesh_suspend(struct macio_dev *mdev, pm_message_t mesg)
{
struct mesh_state *ms = (struct mesh_state *)macio_get_drvdata(mdev);
unsigned long flags;
- if (state.event == mdev->ofdev.dev.power.power_state.event || state.event < 2)
+ switch (mesg.event) {
+ case PM_EVENT_SUSPEND:
+ case PM_EVENT_FREEZE:
+ break;
+ default:
+ return 0;
+ }
+ if (mesg.event == mdev->ofdev.dev.power.power_state.event)
return 0;
scsi_block_requests(ms->host);
@@ -1780,7 +1787,7 @@ static int mesh_suspend(struct macio_dev *mdev, pm_message_t state)
disable_irq(ms->meshintr);
set_mesh_power(ms, 0);
- mdev->ofdev.dev.power.power_state = state;
+ mdev->ofdev.dev.power.power_state = mesg;
return 0;
}