linux-kernel - Re: [PATCH 2/2] ide-generic: handle probing of legacy io-ports

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Message-ID: <20080803150803.GC27766@gollum.tnic>
Date:	Sun, 3 Aug 2008 17:08:03 +0200
From:	Borislav Petkov <petkovbb@...glemail.com>
To:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Cc:	alan@...hat.com, linux-kernel@...r.kernel.org,
	linux-ide@...r.kernel.org
Subject: Re: [PATCH 2/2] ide-generic: handle probing of legacy io-ports

On Sun, Aug 03, 2008 at 04:11:10PM +0200, Bartlomiej Zolnierkiewicz wrote:

[.. ]

> There are still some issues to address though.

Issues addressed. Here's v2:

---
From: Borislav Petkov <petkovbb@...il.com>
Date: Sun, 3 Aug 2008 09:28:53 +0200
Subject: [PATCH] ide-generic: handle probing of legacy io-ports v2

Avoid probing the io-ports in case an IDE PCI controller is present and it uses
the legacy iobases. If we still want to enforce the probing, we do

ide_generic.probe_mask=0x3f

on the kernel command line.

Signed-off-by: Borislav Petkov <petkovbb@...il.com>
---
 drivers/ide/ide-generic.c |   21 +++++++++++++++++----
 1 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/drivers/ide/ide-generic.c b/drivers/ide/ide-generic.c
index 8fe8b5b..1beb51b 100644
--- a/drivers/ide/ide-generic.c
+++ b/drivers/ide/ide-generic.c
@@ -27,7 +27,7 @@
 
 #define DRV_NAME	"ide_generic"
 
-static int probe_mask = 0x03;
+static int probe_mask;
 module_param(probe_mask, int, 0);
 MODULE_PARM_DESC(probe_mask, "probe mask for legacy ISA IDE ports");
 
@@ -105,14 +105,27 @@ static int __init ide_generic_init(void)
 	hw_regs_t hw[MAX_HWIFS], *hws[MAX_HWIFS];
 	struct ide_host *host;
 	unsigned long io_addr;
-	int i, rc;
+	int i, rc, dummy, primary = 0, secondary = 0;
 
 #ifdef CONFIG_MIPS
 	if (!ide_probe_legacy())
 		return -ENODEV;
 #endif
-	printk(KERN_INFO DRV_NAME ": please use \"probe_mask=0x3f\" module "
-			 "parameter for probing all legacy ISA IDE ports\n");
+	ata_legacy_check_iobases(&primary, &secondary, &dummy);
+
+	if (!probe_mask) {
+		printk(KERN_INFO DRV_NAME ": please use \"probe_mask=0x3f\" "
+		       "module parameter for probing all legacy ISA IDE ports\n");
+
+		if (primary == 0)
+			probe_mask |= 0x1;
+
+		if (secondary == 0)
+			probe_mask |= 0x2;
+	} else {
+		printk(KERN_WARNING "%s: enforcing probing of io ports upon "
+			"user request.\n", DRV_NAME);
+	}
 
 	memset(hws, 0, sizeof(hw_regs_t *) * MAX_HWIFS);
 
-- 
1.5.5.4

-- 
Regards/Gruss,
    Boris.
--
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