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ata: pata_hpt37x: disable primary channel on HPT371

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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: 669a5db411 ("[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>
This commit is contained in:
Sergey Shtylyov 2022-02-19 20:44:43 +03:00 committed by Damien Le Moal
parent 5f6b0f2d03
commit 8d093e02e8
1 changed files with 14 additions and 0 deletions
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14
drivers/ata/pata_hpt37x.c
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@ -919,6 +919,20 @@ static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
irqmask &= ~0x10; irqmask &= ~0x10;
pci_write_config_byte(dev, 0x5a, irqmask); 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 * default to pci clock. make sure MA15/16 are set to output
* to prevent drives having problems with 40-pin cables. Needed * to prevent drives having problems with 40-pin cables. Needed