[libata] ahci: send event when AN received
When we get an SDB FIS with the 'N' bit set, we should send
an event to user space to indicate that there has been a
media change. This will be done via the scsi device.
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 4837337..d52b73a 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1368,6 +1368,30 @@
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