HPT371 chips physically have only one channel, the secondary one, however
the primary channel registers do exist! Thus we have to manually disable
the non-existing channel (if the BIOS hasn't done this already). Alan Cox
has only added such code to the 'pata_hpt3x2n' driver, forgetting about
this one... :-/
Signed-off-by: Sergey Shtylyov <s.shtylyov@xxxxxx>
---
This patch is against the 'for-next' branch of Damien Le Moal's 'libata.git'
repo.
drivers/ata/pata_hpt37x.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
Index: libata/drivers/ata/pata_hpt37x.c
===================================================================
--- libata.orig/drivers/ata/pata_hpt37x.c
+++ libata/drivers/ata/pata_hpt37x.c
@@ -867,6 +867,20 @@ static int hpt37x_init_one(struct pci_de
pci_write_config_byte(dev, 0x5a, irqmask);
/*
+ * HPT371 chips physically have only one channel, the secondary one,
+ * but the primary channel registers do exist! Go figure...
+ * So, we manually disable the non-existing channel here
+ * (if the BIOS hasn't done this already).
+ */
+ if (dev->device == PCI_DEVICE_ID_TTI_HPT371) {
+ u8 mcr1;
+
+ pci_read_config_byte(dev, 0x50, &mcr1);
+ mcr1 &= ~0x04;
+ pci_write_config_byte(dev, 0x50, mcr1);
+ }
+
+ /*
* default to pci clock. make sure MA15/16 are set to output
* to prevent drives having problems with 40-pin cables. Needed
* for some drives such as IBM-DTLA which will not enter ready
