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ata: pata_hpt37x: fix PCI clock detection 

[ Upstream commit 5f6b0f2d037c8864f20ff15311c695f65eb09db5 ]

The f_CNT register (at the PCI config. address 0x78) is 16-bit, not
8-bit! The bug was there from the very start... :-(

Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Fixes: 669a5db411 ("[libata] Add a bunch of PATA drivers.")
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sergey Shtylyov 2022-02-19 23:04:29 +03:00 committed by Greg Kroah-Hartman
parent e0bcd6b577
commit b2a3068d5f
1 changed files with 2 additions and 2 deletions
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4
drivers/ata/pata_hpt37x.c
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@ -964,14 +964,14 @@ static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
if ((freq >> 12) != 0xABCDE) {
int i;
u8 sr;
u16 sr;
u32 total = 0;
pr_warn("BIOS has not set timing clocks\n");
/* This is the process the HPT371 BIOS is reported to use */
for (i = 0; i < 128; i++) {
pci_read_config_byte(dev, 0x78, &sr);
pci_read_config_word(dev, 0x78, &sr);
total += sr & 0x1FF;
udelay(15);
}