linux-kernel - Re: [PATCH 2/2] MEMSTICK: Add driver for Ricoh R5C592 Card reader.

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]

Message-ID: <1281367801.22777.19.camel@maxim-laptop>
Date:	Mon, 09 Aug 2010 18:30:01 +0300
From:	Maxim Levitsky <maximlevitsky@...il.com>
To:	Alex Dubov <oakad@...oo.com>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] MEMSTICK: Add driver for Ricoh R5C592 Card reader.

I have another question.

Looking at ms_block.c, I see that it sometimes changes register window.
This doesn't look good.
I see it does put the register window back, but still its a bit obscure.

I added tracking of current register window, so every time I send
MS_TPC_SET_RW_REG_ADRS I note the ranges.
And read/write functions now always attempt to send
MS_TPC_SET_RW_REG_ADRS. If the window is same as was  set last time, TPC
is skipped.

However, I am thinking, that maybe I should always write both param and
extra register? I just write 0xFF to extra register and thats all.
Windows driver does that partially. It writes 0xFF to managmemt and
0xF8 to overwrite flag (why???), but doesn't touch the LBA. I don't
think that matters.
It also always sends the MS_TPC_SET_RW_REG_ADRS, which I don't like.

Best regards,
Maxim Levitsky

--
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/