linux-kernel - Re: [PATCH] atmel_serial: Filter out FP during baud rate detection

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

Date:	Tue, 27 May 2008 20:06:25 +0200
From:	"Andrew Victor" <avictor.za@...il.com>
To:	"Haavard Skinnemoen" <haavard.skinnemoen@...el.com>
Cc:	akpm@...ux-foundation.org, linux@...im.org.za,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] atmel_serial: Filter out FP during baud rate detection

hi Haavard,

> I made a change to u-boot that used the FP (Fractional Part) field of
> BRGR to achieve more accurate baud rate generation. Unfortunately, the
> atmel_serial driver looks at the whole BRGR register when trying to
> detect the baud rate that the port is currently running at, so setting
> FP to a nonzero value breaks the baud rate detection.

> Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@...el.com>

Acked-by: Andrew Victor <linux@...im.org.za>

The FP (Fractional Part) is not supported on some AT91 processors
(RM9200, SAM9261) though.
Those bits in BRGR are undefined.


Regards,
  Andrew Victor
--
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/