diff options
Diffstat (limited to 'drivers/ata/ahci.c')
| -rw-r--r-- | drivers/ata/ahci.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index 483733783cf8..d52b73ab795a 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -1368,6 +1368,30 @@ static void ahci_port_intr(struct ata_port *ap) return; } + if (status & PORT_IRQ_SDB_FIS) { + /* + * if this is an ATAPI device with AN turned on, + * then we should interrogate the device to + * determine the cause of the interrupt + * + * for AN - this we should check the SDB FIS + * and find the I and N bits set + */ + const __le32 *f = pp->rx_fis + RX_FIS_SDB; + u32 f0 = le32_to_cpu(f[0]); + + /* check the 'N' bit in word 0 of the FIS */ + if (f0 & (1 << 15)) { + int port_addr = ((f0 & 0x00000f00) >> 8); + struct ata_device *adev; + if (port_addr < ATA_MAX_DEVICES) { + adev = &ap->link.device[port_addr]; + if (adev->flags & ATA_DFLAG_AN) + ata_scsi_media_change_notify(adev); + } + } + } + if (ap->link.sactive) qc_active = readl(port_mmio + PORT_SCR_ACT); else |