From: Kristen Carlson Accardi 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 Cc: Jeff Garzik Cc: Tejun Heo Cc: James Bottomley Signed-off-by: Andrew Morton --- 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 @@ -1529,6 +1529,28 @@ static void ahci_port_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 @@ -3213,6 +3213,22 @@ 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) +{ + scsi_device_event_notify(atadev->sdev, SDEV_MEDIA_CHANGE); +} +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 @@ -760,6 +760,7 @@ 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 *); _