From: Kristen Carlson Accardi <kristen.c.accardi@xxxxxxxxx>
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 block device.
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/ata/ahci.c | 22 ++++++++++++++++++++++
drivers/ata/libata-scsi.c | 16 ++++++++++++++++
include/linux/libata.h | 1 +
3 files changed, 39 insertions(+)
diff -puN drivers/ata/ahci.c~libata-send-event-when-an-received drivers/ata/ahci.c
--- a/drivers/ata/ahci.c~libata-send-event-when-an-received
+++ a/drivers/ata/ahci.c
@@ -1267,6 +1267,28 @@ static void ahci_host_intr(struct ata_po
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 u32 *f = pp->rx_fis + RX_FIS_SDB;
+
+ /* check the 'N' bit in word 0 of the FIS */
+ if (f[0] & (1 << 15)) {
+ int port_addr = ((f[0] & 0x00000f00) >> 8);
+ struct ata_device *adev;
+ if (port_addr < ATA_MAX_DEVICES) {
+ adev = &ap->device[port_addr];
+ if (adev->flags & ATA_DFLAG_AN)
+ ata_scsi_media_change_notify(adev);
+ }
+ }
+ }
if (ap->sactive)
qc_active = readl(port_mmio + PORT_SCR_ACT);
else
diff -puN drivers/ata/libata-scsi.c~libata-send-event-when-an-received drivers/ata/libata-scsi.c
--- a/drivers/ata/libata-scsi.c~libata-send-event-when-an-received
+++ a/drivers/ata/libata-scsi.c
@@ -3018,6 +3018,22 @@ static void ata_scsi_remove_dev(struct a
}
/**
+ * ata_scsi_media_change_notify - send media change event
+ * @atadev: Pointer to the disk device with media change event
+ *
+ * Tell the block layer to send a media change notification
+ * event.
+ *
+ * LOCKING:
+ * interrupt context, may not sleep.
+ */
+void ata_scsi_media_change_notify(struct ata_device *atadev)
+{
+ genhd_media_change_notify(atadev->sdev->disk);
+}
+EXPORT_SYMBOL_GPL(ata_scsi_media_change_notify);
+
+/**
* ata_scsi_hotplug - SCSI part of hotplug
* @work: Pointer to ATA port to perform SCSI hotplug on
*
diff -puN include/linux/libata.h~libata-send-event-when-an-received include/linux/libata.h
--- a/include/linux/libata.h~libata-send-event-when-an-received
+++ a/include/linux/libata.h
@@ -711,6 +711,7 @@ extern void ata_host_init(struct ata_hos
extern int ata_scsi_detect(struct scsi_host_template *sht);
extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
+extern void ata_scsi_media_change_notify(struct ata_device *atadev);
extern void ata_sas_port_destroy(struct ata_port *);
extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
struct ata_port_info *, struct Scsi_Host *);
_
-
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