diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-20 14:31:27 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-20 14:31:27 -0700 |
| commit | 557eed603159b4e007c57d97fad1333ecebd3c2e (patch) | |
| tree | ae784d4578da59617f87e36728ed2cafb2be50d6 /drivers/ata/libata-core.c | |
| parent | be84bfcc3ed8f824751ab79349779e50cc98aa01 (diff) | |
| parent | 8a745f1f39b7a20047a362b67ce9151c07d14440 (diff) | |
Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
libata: Power off empty ports
libata-pmp: add support for Thermaltake BlackX Duet esata drive dock
ATA: Don't powerdown Compaq Triflex IDE device on suspend
libata: Use Maximum Write Same Length to report discard size limit
drivers/ata/acard-ahci.c: fix enum warning
pata_at91: SMC settings calculation bugfixes, support for t6z and IORDY
libata-sff: prevent irq descriptions for dummy ports
pata_cm64x: fix boot crash on parisc
Diffstat (limited to 'drivers/ata/libata-core.c')
| -rw-r--r-- | drivers/ata/libata-core.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 76c3c15cb1e6..736bee5dafeb 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -3619,8 +3619,14 @@ int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy, scontrol |= (0x2 << 8); break; case ATA_LPM_MIN_POWER: - /* no restrictions on LPM transitions */ - scontrol &= ~(0x3 << 8); + if (ata_link_nr_enabled(link) > 0) + /* no restrictions on LPM transitions */ + scontrol &= ~(0x3 << 8); + else { + /* empty port, power off */ + scontrol &= ~0xf; + scontrol |= (0x1 << 2); + } break; default: WARN_ON(1); |