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path: root/drivers/scsi/sata_vsc.c
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Diffstat (limited to 'drivers/scsi/sata_vsc.c')
-rw-r--r--drivers/scsi/sata_vsc.c30
1 files changed, 29 insertions, 1 deletions
diff --git a/drivers/scsi/sata_vsc.c b/drivers/scsi/sata_vsc.c
index 2e2c3b7acb0..e484e8db681 100644
--- a/drivers/scsi/sata_vsc.c
+++ b/drivers/scsi/sata_vsc.c
@@ -81,6 +81,19 @@
/* Port stride */
#define VSC_SATA_PORT_OFFSET 0x200
+/* Error interrupt status bit offsets */
+#define VSC_SATA_INT_ERROR_E_OFFSET 2
+#define VSC_SATA_INT_ERROR_P_OFFSET 4
+#define VSC_SATA_INT_ERROR_T_OFFSET 5
+#define VSC_SATA_INT_ERROR_M_OFFSET 1
+#define is_vsc_sata_int_err(port_idx, int_status) \
+ (int_status & ((1 << (VSC_SATA_INT_ERROR_E_OFFSET + (8 * port_idx))) | \
+ (1 << (VSC_SATA_INT_ERROR_P_OFFSET + (8 * port_idx))) | \
+ (1 << (VSC_SATA_INT_ERROR_T_OFFSET + (8 * port_idx))) | \
+ (1 << (VSC_SATA_INT_ERROR_M_OFFSET + (8 * port_idx))) \
+ )\
+ )
+
static u32 vsc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg)
{
@@ -201,13 +214,28 @@ static irqreturn_t vsc_sata_interrupt (int irq, void *dev_instance,
struct ata_port *ap;
ap = host_set->ports[i];
+
+ if (is_vsc_sata_int_err(i, int_status)) {
+ u32 err_status;
+ printk(KERN_DEBUG "%s: ignoring interrupt(s)\n", __FUNCTION__);
+ err_status = ap ? vsc_sata_scr_read(ap, SCR_ERROR) : 0;
+ vsc_sata_scr_write(ap, SCR_ERROR, err_status);
+ handled++;
+ }
+
if (ap && !(ap->flags &
(ATA_FLAG_PORT_DISABLED|ATA_FLAG_NOINTR))) {
struct ata_queued_cmd *qc;
qc = ata_qc_from_tag(ap, ap->active_tag);
- if (qc && (!(qc->tf.ctl & ATA_NIEN)))
+ if (qc && (!(qc->tf.ctl & ATA_NIEN))) {
handled += ata_host_intr(ap, qc);
+ } else {
+ printk(KERN_DEBUG "%s: ignoring interrupt(s)\n", __FUNCTION__);
+ ata_chk_status(ap);
+ handled++;
+ }
+
}
}
}