linux-kernel - [PATCH] pata_hpt366: add hpt36x_find

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <200911271954.54019.bzolnier@gmail.com>
Date:	Fri, 27 Nov 2009 19:54:53 +0100
From:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To:	linux-ide@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Sergei Shtylyov <sshtylyov@...mvista.com>
Subject: [PATCH] pata_hpt366: add hpt36x_find_mode() helper

Factor out code for finding the register programming information
from hpt366_set_mode() to hpt36x_find_mode().

This makes pata_hpt366 driver more similar to pata_{37x,3x2n} ones.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
---
Sergei, pata_hpt{37x,3x2n} drivers can also be made to use *set_mode()
helper but I don't want to interfere with your pending fixes there.

 drivers/ata/pata_hpt366.c |   35 +++++++++++++++++++++++++----------
 1 file changed, 25 insertions(+), 10 deletions(-)

Index: b/drivers/ata/pata_hpt366.c
===================================================================
--- a/drivers/ata/pata_hpt366.c
+++ b/drivers/ata/pata_hpt366.c
@@ -114,6 +114,28 @@ static const struct hpt_clock hpt366_25[
 	{	0,		0x01208585	}
 };
 
+/**
+ *	hpt36x_find_mode	-	find the hpt36x timing
+ *	@ap: ATA port
+ *	@speed: transfer mode
+ *
+ *	Return the 32bit register programming information for this channel
+ *	that matches the speed provided.
+ */
+
+static u32 hpt36x_find_mode(struct ata_port *ap, int speed)
+{
+	struct hpt_clock *clocks = ap->host->private_data;
+
+	while (clocks->xfer_mode) {
+		if (clocks->xfer_mode == speed)
+			return clocks->timing;
+		clocks++;
+	}
+	BUG();
+	return 0xffffffffU;	/* silence compiler warning */
+}
+
 static const char *bad_ata33[] = {
 	"Maxtor 92720U8", "Maxtor 92040U6", "Maxtor 91360U4", "Maxtor 91020U3", "Maxtor 90845U3", "Maxtor 90650U2",
 	"Maxtor 91360D8", "Maxtor 91190D7", "Maxtor 91020D6", "Maxtor 90845D5", "Maxtor 90680D4", "Maxtor 90510D3", "Maxtor 90340D2",
@@ -238,11 +260,10 @@ static int hpt36x_prereset(struct ata_li
 static void hpt366_set_mode(struct ata_port *ap, struct ata_device *adev,
 			    u8 mode)
 {
-	struct hpt_clock *clocks = ap->host->private_data;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 	u32 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
 	u32 addr2 = 0x51 + 4 * ap->port_no;
-	u32 mask, reg;
+	u32 mask, reg, t;
 	u8 fast;
 
 	/* Fast interrupt prediction disable, hold off interrupt disable */
@@ -260,13 +281,7 @@ static void hpt366_set_mode(struct ata_p
 	else
 		mask = 0x30070000;
 
-	while (clocks->xfer_mode) {
-		if (clocks->xfer_mode == mode)
-			break;
-		clocks++;
-	}
-	if (!clocks->xfer_mode)
-		BUG();
+	t = hpt36x_find_mode(ap, mode);
 
 	/*
 	 * Combine new mode bits with old config bits and disable
@@ -274,7 +289,7 @@ static void hpt366_set_mode(struct ata_p
 	 * problems handling I/O errors later.
 	 */
 	pci_read_config_dword(pdev, addr1, &reg);
-	reg = ((reg & ~mask) | (clocks->timing & mask)) & ~0xc0000000;
+	reg = ((reg & ~mask) | (t & mask)) & ~0xc0000000;
 	pci_write_config_dword(pdev, addr1, reg);
 }
 
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/