This mirrors a very old commit (3160d5416f39da9d9) to the old sis5513
IDE driver that prevents certain setups from working. UDMA6, aka
ATA/133, is not supported on some chipsets and we need to ensure this
mode is not chosen even if a connected drive supports it. Port this old
patch forward to the new PATA driver to ensure UDMA5 is the highest mode
used if that is what is supported.
Kernel bugzilla #41582.
Reviewed-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
Signed-off-by: Dan McGee <dpmcgee@xxxxxxxxx>
---
drivers/ata/pata_sis.c | 27 ++++++++++++++++++++++++++-
1 files changed, 26 insertions(+), 1 deletions(-)
diff --git a/drivers/ata/pata_sis.c b/drivers/ata/pata_sis.c
index 9374400..54c41c7 100644
--- a/drivers/ata/pata_sis.c
+++ b/drivers/ata/pata_sis.c
@@ -509,6 +509,27 @@ static void sis_133_set_dmamode (struct ata_port *ap, struct ata_device *adev)
pci_write_config_dword(pdev, port, t1);
}
+/**
+ * sis_133_mode_filter - mode selection filter
+ * @adev: ATA device
+ *
+ * Block UDMA6 on devices that do not support it.
+ */
+
+static unsigned long sis_133_mode_filter(struct ata_device *adev, unsigned long mask)
+{
+ struct ata_port *ap = adev->link->ap;
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ int port = sis_port_base(adev);
+ u32 t1;
+
+ pci_read_config_dword(pdev, port, &t1);
+ /* if ATA133 is disabled, mask it out */
+ if (!(t1 & 0x08))
+ mask &= ~(0xE0 << ATA_SHIFT_UDMA);
+ return mask;
+}
+
static struct scsi_host_template sis_sht = {
ATA_BMDMA_SHT(DRV_NAME),
};
@@ -530,6 +551,7 @@ static struct ata_port_operations sis_133_ops = {
.set_piomode = sis_133_set_piomode,
.set_dmamode = sis_133_set_dmamode,
.cable_detect = sis_133_cable_detect,
+ .mode_filter = sis_133_mode_filter,
};
static struct ata_port_operations sis_133_early_ops = {
@@ -779,10 +801,13 @@ static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
switch(trueid) {
case 0x5518: /* SIS 962/963 */
+ printk(KERN_INFO DRV_NAME " %s: SiS 962/963 MuTIOL IDE UDMA133 controller\n",
+ pci_name(pdev));
chipset = &sis133;
if ((idemisc & 0x40000000) == 0) {
pci_write_config_dword(pdev, 0x54, idemisc | 0x40000000);
- printk(KERN_INFO "SIS5513: Switching to 5513 register mapping\n");
+ printk(KERN_INFO DRV_NAME " %s: Switching to 5513 register mapping\n",
+ pci_name(pdev));
}
break;
case 0x0180: /* SIS 965/965L */
--
1.7.6.1
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