PWN-Hunter/android_kernel_xiaomi_sdm845
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[libata] ahci: send event when AN received

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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>
This commit is contained in:
Kristen Carlson Accardi 2007-08-15 04:11:25 -04:00 committed by Jeff Garzik
parent 9f45cbd3f0
commit 2f2949680a
3 changed files with 43 additions and 0 deletions
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24
drivers/ata/ahci.c
View File

@ -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

18
drivers/ata/libata-scsi.c
View File

@ -3159,6 +3159,24 @@ static void ata_scsi_handle_link_detach(struct ata_link *link)
}
}
/**
* 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)
{
#ifdef OTHER_AN_PATCHES_HAVE_BEEN_APPLIED
scsi_device_event_notify(atadev->sdev, SDEV_MEDIA_CHANGE);
#endif
}
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

1
include/linux/libata.h
View File

@ -755,6 +755,7 @@ extern void ata_host_init(struct ata_host *, struct device *,
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 *);