VT6420 seems to have the same hotplug capability as VT6421.
However, enabling hotplug needs to expose SCR registers which can cause
problems. It works for me but might break elsewhere.
---
drivers/ata/sata_via.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c
index f3f538e..fafb0d3 100644
--- a/drivers/ata/sata_via.c
+++ b/drivers/ata/sata_via.c
@@ -132,6 +132,8 @@ struct svia_priv {
static struct ata_port_operations vt6420_sata_ops = {
.inherits = &svia_base_ops,
+ .scr_read = svia_scr_read,
+ .scr_write = svia_scr_write,
.freeze = svia_noop_freeze,
.prereset = vt6420_prereset,
.bmdma_start = vt6420_bmdma_start,
@@ -556,7 +558,7 @@ static void svia_wd_fix(struct pci_dev *pdev)
pci_write_config_byte(pdev, 0x52, tmp8 | BIT(2));
}
-static irqreturn_t vt6421_interrupt(int irq, void *dev_instance)
+static irqreturn_t vt642x_interrupt(int irq, void *dev_instance)
{
struct ata_host *host = dev_instance;
irqreturn_t rc = ata_bmdma_interrupt(irq, dev_instance);
@@ -644,7 +646,7 @@ static void svia_configure(struct pci_dev *pdev, int
board_id,
pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8);
}
- if (board_id == vt6421) {
+ if (board_id == vt6420 || board_id == vt6421) {
/* enable IRQ on hotplug */
pci_read_config_byte(pdev, SVIA_MISC_3, &tmp8);
if ((tmp8 & SATA_HOTPLUG) != SATA_HOTPLUG) {
@@ -744,8 +746,8 @@ static int svia_init_one(struct pci_dev *pdev, const struct
pci_device_id *ent)
svia_configure(pdev, board_id, hpriv);
pci_set_master(pdev);
- if (board_id == vt6421)
- return ata_host_activate(host, pdev->irq, vt6421_interrupt,
+ if (board_id == vt6420 || board_id == vt6421)
+ return ata_host_activate(host, pdev->irq, vt642x_interrupt,
IRQF_SHARED, &svia_sht);
else
return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
--
Ondrej Zary
