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| author | Arjan van de Ven <arjan@linux.intel.com> | 2009-01-26 02:05:44 -0800 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2009-02-02 22:41:39 -0500 |
| commit | f3d7f23f87723a0947164ec88fc40e08254a64d6 (patch) | |
| tree | ba2e9c0ffa11df9c1e862d9d6ed0c1b090cfc5e4 /drivers/ata/ahci.c | |
| parent | 4462254ac6be9150aae87d54d388fc348d6fcead (diff) | |
| download | blackbird-op-linux-f3d7f23f87723a0947164ec88fc40e08254a64d6.tar.gz blackbird-op-linux-f3d7f23f87723a0947164ec88fc40e08254a64d6.zip | |
ahci: add a module parameter to ignore the SSS flags for async scanning
The SSS flag, which directs the OS to spin up one disk at a time
to not have the PSU blow out, sometimes gets set even when not needed.
The effect of this is a longer-than-needed boot time.
This patch adds a module parameter that makes the driver ignore SSS
at least as far as the parallel scan during boot is concerned...
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata/ahci.c')
| -rw-r--r-- | drivers/ata/ahci.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index 77bba4c083cb..a603bbf9b1b7 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -61,9 +61,14 @@ #define EM_MSG_LED_VALUE_ON 0x00010000 static int ahci_skip_host_reset; +static int ahci_ignore_sss; + module_param_named(skip_host_reset, ahci_skip_host_reset, int, 0444); MODULE_PARM_DESC(skip_host_reset, "skip global host reset (0=don't skip, 1=skip)"); +module_param_named(ignore_sss, ahci_ignore_sss, int, 0444); +MODULE_PARM_DESC(ignore_sss, "Ignore staggered spinup flag (0=don't ignore, 1=ignore)"); + static int ahci_enable_alpm(struct ata_port *ap, enum link_pm policy); static void ahci_disable_alpm(struct ata_port *ap); @@ -2692,8 +2697,10 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) host->iomap = pcim_iomap_table(pdev); host->private_data = hpriv; - if (!(hpriv->cap & HOST_CAP_SSS)) + if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss) host->flags |= ATA_HOST_PARALLEL_SCAN; + else + printk(KERN_INFO "ahci: SSS flag set, parallel bus scan disabled\n"); if (pi.flags & ATA_FLAG_EM) ahci_reset_em(host); |
