From b2a3068d5f152c027a4615413e2d162859183bfb Mon Sep 17 00:00:00 2001
From: Sergey Shtylyov <s.shtylyov@omp.ru>
Date: Sat, 19 Feb 2022 23:04:29 +0300
Subject: [PATCH] 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: 669a5db411d8 ("[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>
---
drivers/ata/pata_hpt37x.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/ata/pata_hpt37x.c b/drivers/ata/pata_hpt37x.c
index ae8375e9d268..9d371859e81e 100644
--- a/drivers/ata/pata_hpt37x.c
+++ b/drivers/ata/pata_hpt37x.c
@@ -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);
}