diff options
| author | Tejun Heo <tj@kernel.org> | 2011-03-16 11:14:55 +0100 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2011-04-24 11:32:16 -0400 |
| commit | ae01b2493c3bf03c504c32ac4ebb01d528508db3 (patch) | |
| tree | e2f10e9054ca9c883f59aab7fec776ed2aece281 /drivers/ata/libata-eh.c | |
| parent | 3f7ac1d6671ebca7a955853f7127c937f7befbd3 (diff) | |
libata: Implement ATA_FLAG_NO_DIPM and apply it to mcp65
NVIDIA mcp65 familiy of controllers cause command timeouts when DIPM
is used. Implement ATA_FLAG_NO_DIPM and apply it.
This problem was reported by Stefan Bader in the following thread.
http://thread.gmane.org/gmane.linux.ide/48841
stable: applicable to 2.6.37 and 38.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Stefan Bader <stefan.bader@canonical.com>
Cc: stable@kernel.org
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'drivers/ata/libata-eh.c')
| -rw-r--r-- | drivers/ata/libata-eh.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 88cd22fa65cd..f26f2fe3480a 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -3316,6 +3316,7 @@ static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, struct ata_eh_context *ehc = &link->eh_context; struct ata_device *dev, *link_dev = NULL, *lpm_dev = NULL; enum ata_lpm_policy old_policy = link->lpm_policy; + bool no_dipm = ap->flags & ATA_FLAG_NO_DIPM; unsigned int hints = ATA_LPM_EMPTY | ATA_LPM_HIPM; unsigned int err_mask; int rc; @@ -3332,7 +3333,7 @@ static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, */ ata_for_each_dev(dev, link, ENABLED) { bool hipm = ata_id_has_hipm(dev->id); - bool dipm = ata_id_has_dipm(dev->id); + bool dipm = ata_id_has_dipm(dev->id) && !no_dipm; /* find the first enabled and LPM enabled devices */ if (!link_dev) @@ -3389,7 +3390,8 @@ static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, /* host config updated, enable DIPM if transitioning to MIN_POWER */ ata_for_each_dev(dev, link, ENABLED) { - if (policy == ATA_LPM_MIN_POWER && ata_id_has_dipm(dev->id)) { + if (policy == ATA_LPM_MIN_POWER && !no_dipm && + ata_id_has_dipm(dev->id)) { err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE, SATA_DIPM); if (err_mask && err_mask != AC_ERR_DEV) { |