From a565ed1b9b1dc11cabed10e1c7c1b245c8db1aef Mon Sep 17 00:00:00 2001
From: Sergey Shtylyov <s.shtylyov@omp.ru>
Date: Mon, 7 Feb 2022 17:26:13 +0300
Subject: pata_hpt3x2n: check channel enable bits
The driver's prereset() method still doesn't check the channel enable bits.
The bug was there for the entire time the driver has existed. :-/
Alan Cox fixed the HPT37x driver in commit b5bf24b94c65 ("[PATCH] hpt37x:
Check the enablebits") but forgot to check the HPT3x2N driver which has
the same bug. :-/
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
---
drivers/ata/pata_hpt3x2n.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/ata/pata_hpt3x2n.c b/drivers/ata/pata_hpt3x2n.c
index 1d9d4eec5b8a..cbe57aba39bc 100644
--- a/drivers/ata/pata_hpt3x2n.c
+++ b/drivers/ata/pata_hpt3x2n.c
@@ -24,7 +24,7 @@
#include <linux/libata.h>
#define DRV_NAME "pata_hpt3x2n"
-#define DRV_VERSION "0.3.15"
+#define DRV_VERSION "0.3.16"
enum {
HPT_PCI_FAST = (1 << 31),
@@ -168,6 +168,13 @@ static int hpt3x2n_pre_reset(struct ata_link *link, unsigned long deadline)
{
struct ata_port *ap = link->ap;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ static const struct pci_bits hpt3x2n_enable_bits[] = {
+ { 0x50, 1, 0x04, 0x04 },
+ { 0x54, 1, 0x04, 0x04 }
+ };
+
+ if (!pci_test_config_bits(pdev, &hpt3x2n_enable_bits[ap->port_no]))
+ return -ENOENT;
/* Reset the state machine */
pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
--
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