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| author | David Brownell <david-b@pacbell.net> | 2006-08-14 23:11:03 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-09-25 21:08:37 -0700 |
| commit | 8b4b8a24e4e49dc9fe36d4d079f6d2c23f942b03 (patch) | |
| tree | f8c2a452bff75b013182dd90996eef0aa760042c /drivers/scsi/mesh.c | |
| parent | 8f4bcc20ee39f9c087f3532672e3e5f086e92281 (diff) | |
| download | linux-8b4b8a24e4e49dc9fe36d4d079f6d2c23f942b03.tar.gz linux-8b4b8a24e4e49dc9fe36d4d079f6d2c23f942b03.tar.bz2 linux-8b4b8a24e4e49dc9fe36d4d079f6d2c23f942b03.zip | |
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/scsi/mesh.c')
| -rw-r--r-- | drivers/scsi/mesh.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/scsi/mesh.c b/drivers/scsi/mesh.c index 592b52afe658..683fc7ae4b8f 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; } |