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fix broken/dubious driver suspend() methods

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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>
This commit is contained in:
David Brownell
2006-08-14 23:11:03 -07:00
committed by Greg Kroah-Hartman
parent 8f4bcc20ee
commit 8b4b8a24e4
3 changed files with 20 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/ide/ppc/pmac.c
View File

@@ -1369,15 +1369,16 @@ pmac_ide_macio_attach(struct macio_dev *mdev, const struct of_device_id *match)
} }
static int 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); ide_hwif_t *hwif = (ide_hwif_t *)dev_get_drvdata(&mdev->ofdev.dev);
int rc = 0; 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); rc = pmac_ide_do_suspend(hwif);
if (rc == 0) if (rc == 0)
mdev->ofdev.dev.power.power_state = state; mdev->ofdev.dev.power.power_state = mesg;
} }
return rc; return rc;
@@ -1473,15 +1474,16 @@ pmac_ide_pci_attach(struct pci_dev *pdev, const struct pci_device_id *id)
} }
static int 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); ide_hwif_t *hwif = (ide_hwif_t *)pci_get_drvdata(pdev);
int rc = 0; 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); rc = pmac_ide_do_suspend(hwif);
if (rc == 0) if (rc == 0)
pdev->dev.power.power_state = state; pdev->dev.power.power_state = mesg;
} }
return rc; return rc;

2
drivers/media/dvb/cinergyT2/cinergyT2.c
View File

@@ -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)) if (cinergyt2->disconnect_pending || mutex_lock_interruptible(&cinergyt2->sem))
return -ERESTARTSYS; return -ERESTARTSYS;
if (state.event > PM_EVENT_ON) { if (1) {
struct cinergyt2 *cinergyt2 = usb_get_intfdata (intf); struct cinergyt2 *cinergyt2 = usb_get_intfdata (intf);
cinergyt2_suspend_rc(cinergyt2); cinergyt2_suspend_rc(cinergyt2);

13
drivers/scsi/mesh.c
View File

@@ -1760,12 +1760,19 @@ static void set_mesh_power(struct mesh_state *ms, int state)
#ifdef CONFIG_PM #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); struct mesh_state *ms = (struct mesh_state *)macio_get_drvdata(mdev);
unsigned long flags; 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; return 0;
scsi_block_requests(ms->host); 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); disable_irq(ms->meshintr);
set_mesh_power(ms, 0); set_mesh_power(ms, 0);
mdev->ofdev.dev.power.power_state = state; mdev->ofdev.dev.power.power_state = mesg;
return 0; return 0;
} }