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authorSergey Shtylyov <s.shtylyov@omp.ru>2022-02-19 20:44:43 +0300
committerDamien Le Moal <damien.lemoal@opensource.wdc.com>2022-02-23 03:39:37 +0300
commit8d093e02e898b24c58788b0289e3202317a96d2a (patch)
tree1a3a0d722085de0a27abf41a928cc6cc86f87172 /drivers
parent5f6b0f2d037c8864f20ff15311c695f65eb09db5 (diff)
downloadlinux-8d093e02e898b24c58788b0289e3202317a96d2a.tar.xz
ata: pata_hpt37x: disable primary channel on HPT371
The HPT371 chip physically has 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. Similarly to the pata_hpt3x2n driver, always disable the primary channel. Fixes: 669a5db411d8 ("[libata] Add a bunch of PATA drivers.") Cc: stable@vger.kernel.org Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru> Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/ata/pata_hpt37x.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/ata/pata_hpt37x.c b/drivers/ata/pata_hpt37x.c
index 1baaca7b72ed..6fa4a2faf49c 100644
--- a/drivers/ata/pata_hpt37x.c
+++ b/drivers/ata/pata_hpt37x.c
@@ -920,6 +920,20 @@ static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
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