[PATCH 4.9 11/32] ata: pata_hpt37x: fix PCI clock detection

[Greg Kroah-Hartman]

From: Sergey Shtylyov <s.shtylyov@xxxxxx>

[ 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@xxxxxx>
Fixes: 669a5db411d8 ("[libata] Add a bunch of PATA drivers.")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Damien Le Moal <damien.lemoal@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/ata/pata_hpt37x.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/ata/pata_hpt37x.c
+++ b/drivers/ata/pata_hpt37x.c
@@ -964,14 +964,14 @@ static int hpt37x_init_one(struct pci_de
 
 	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);
 		}