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| author | Shane Huang <shane.huang@amd.com> | 2010-03-16 18:08:55 +0800 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2010-03-17 15:54:55 -0400 |
| commit | 5db5b0215af94a36d4bf10900ff9707b6d5c1610 (patch) | |
| tree | 282907c4f5cc0b9193f2c863351f025f3bc1d1a1 /drivers/ata/ahci.c | |
| parent | 9deb343189b3cf45e84dd08480f330575ffe2004 (diff) | |
| download | linux-3.10-5db5b0215af94a36d4bf10900ff9707b6d5c1610.tar.gz linux-3.10-5db5b0215af94a36d4bf10900ff9707b6d5c1610.tar.bz2 linux-3.10-5db5b0215af94a36d4bf10900ff9707b6d5c1610.zip | |
ahci: pp->active_link is not reliable when FBS is enabled
pp->active_link is not reliable when FBS is enabled.
Both PORT_SCR_ACT and PORT_CMD_ISSUE should be checked
because mixed NCQ and non-NCQ commands may be in flight.
Signed-off-by: Shane Huang <shane.huang@amd.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata/ahci.c')
| -rw-r--r-- | drivers/ata/ahci.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index e7e2c7a147f..fdc9bcbe55a 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -2278,7 +2278,7 @@ static void ahci_port_intr(struct ata_port *ap) struct ahci_port_priv *pp = ap->private_data; struct ahci_host_priv *hpriv = ap->host->private_data; int resetting = !!(ap->pflags & ATA_PFLAG_RESETTING); - u32 status, qc_active; + u32 status, qc_active = 0; int rc; status = readl(port_mmio + PORT_IRQ_STAT); @@ -2336,11 +2336,22 @@ static void ahci_port_intr(struct ata_port *ap) } } - /* pp->active_link is valid iff any command is in flight */ - if (ap->qc_active && pp->active_link->sactive) - qc_active = readl(port_mmio + PORT_SCR_ACT); - else - qc_active = readl(port_mmio + PORT_CMD_ISSUE); + /* pp->active_link is not reliable once FBS is enabled, both + * PORT_SCR_ACT and PORT_CMD_ISSUE should be checked because + * NCQ and non-NCQ commands may be in flight at the same time. + */ + if (pp->fbs_enabled) { + if (ap->qc_active) { + qc_active = readl(port_mmio + PORT_SCR_ACT); + qc_active |= readl(port_mmio + PORT_CMD_ISSUE); + } + } else { + /* pp->active_link is valid iff any command is in flight */ + if (ap->qc_active && pp->active_link->sactive) + qc_active = readl(port_mmio + PORT_SCR_ACT); + else + qc_active = readl(port_mmio + PORT_CMD_ISSUE); + } rc = ata_qc_complete_multiple(ap, qc_active); |