linux-kernel - RE: [PATCH 4/4] x86_64 ioapic: Improve the heuristics for when check

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: <5986589C150B2F49A46483AC44C7BCA4907361@ssvlexmb2.amd.com>
Date:	Mon, 8 Jan 2007 09:41:18 -0800
From:	"Lu, Yinghai" <yinghai.lu@....com>
To:	ebiederm@...ssion.com, "Linus Torvalds" <torvalds@...l.org>
cc:	"Tobias Diedrich" <ranma+kernel@...edrich.de>,
	"Andrew Morton" <akpm@...l.org>, "Adrian Bunk" <bunk@...sta.de>,
	"Andi Kleen" <ak@...e.de>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 4/4] x86_64 ioapic: Improve the heuristics for when
 check_timer fails.

-----Original Message-----
From: ebiederm@...ssion.com [mailto:ebiederm@...ssion.com] 
Sent: Monday, January 08, 2007 8:11 AM
To: Linus Torvalds
Cc: Tobias Diedrich; Lu, Yinghai; Andrew Morton; Adrian Bunk; Andi
Kleen; Linux Kernel Mailing List
Subject: [PATCH 4/4] x86_64 ioapic: Improve the heuristics for when
check_timer fails.


>+static int check_timer_pin(int apic, int pin)
>+{
>+	int irq, idx;
>+	/* 
>+	 * Test the architecture default i8254 timer pin
>+	 * of apic 0 pin 2.
>+	 */

Comments need to be updated.

>+
>+
>+	/* If the apic pin pair is in use by another irq fail */
>+	irq = irq_from_pin(apic, pin);
>+	if ((irq != -1) && (irq != 0)) {
>+		apic_printk(APIC_VERBOSE,KERN_INFO "...apic %d pin % in
use by irq %d\n",
>+			apic, pin, irq);
>+		return 0; 
>+	}
>+
>+	/* Add an entry in mp_irqs for irq 0 */
>+	idx = update_irq0_entry(apic, pin);
>+
>+	/* Add an entry in irq_to_pin */
>+	add_pin_to_irq(0, apic, pin);
>+
>+	/* Now setup the irq */
>+	setup_IO_APIC_irq(apic, pin, idx, 0);
>+
>+	/* And finally check to see if the irq works */
>+	return do_check_timer_pin(apic, pin);
>+}
>+

Did you miss to call irq_from_pin before add_pin_to_irq? You defined
irq_from_pin in PATCH 2/4.

YH


-
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/