From: Willy Tarreau <w@1wt.eu>
To: Denis Efremov <efremov@linux.com>
Cc: Jens Axboe <axboe@kernel.dk>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-block <linux-block@vger.kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH 01/10] floppy: cleanup: expand macro FDCS
Date: Tue, 25 Feb 2020 19:08:20 +0100 [thread overview]
Message-ID: <20200225180820.GA1133@1wt.eu> (raw)
In-Reply-To: <20200225180219.GA395@1wt.eu>
On Tue, Feb 25, 2020 at 07:02:19PM +0100, Willy Tarreau wrote:
> On Tue, Feb 25, 2020 at 06:22:47PM +0300, Denis Efremov wrote:
> > I think that for the first attempt changing will be enough:
> > -static int fdc; /* current fdc */
> > +static int current_fdc; /* current fdc */
> > and
> > -#define FD_IOPORT fdc_state[fdc].address
> > +#define FD_IOPORT fdc_state[current_fdc].address
> > and for fd_setdor in ./arch/arm/include/asm/floppy.h
>
> So after a bit more digging, that should not be correct because:
> - disk_change() uses a local "fdc" variable with expectations that
> it will be used by fd_inb(FD_DIR)
>
> - set_dor() uses a local fdc argument that's used by
> fd_outb(newdor, FD_DOR)
>
> Here we have "fdc" hidden in:
> - FD_DOR/FD_DIR (referencing FD_IOPORT) on x86
> - fd_outb(), relying on fd_setdor() on ARM
And in the ARM case, fdc is used to index a two-entries array with exactly
identical values, with N_FDC set to 1 so even there it's pointless... Maybe
I'll get rid of this first.
Willy
next prev parent reply other threads:[~2020-02-25 18:08 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-24 21:23 [PATCH 00/10] floppy driver cleanups (deobfuscation) Willy Tarreau
2020-02-24 21:23 ` [PATCH 01/10] floppy: cleanup: expand macro FDCS Willy Tarreau
2020-02-24 21:53 ` Linus Torvalds
2020-02-24 23:13 ` Denis Efremov
2020-02-25 3:45 ` Willy Tarreau
2020-02-25 7:14 ` Denis Efremov
2020-02-25 14:02 ` Willy Tarreau
2020-02-25 15:22 ` Denis Efremov
2020-02-25 15:39 ` Denis Efremov
2020-02-25 16:12 ` Willy Tarreau
2020-02-25 18:02 ` Willy Tarreau
2020-02-25 18:08 ` Willy Tarreau [this message]
2020-02-25 18:08 ` Linus Torvalds
2020-02-25 18:15 ` Willy Tarreau
2020-02-25 18:27 ` Linus Torvalds
2020-02-26 8:18 ` Willy Tarreau
2020-02-25 11:37 ` Denis Efremov
2020-02-24 21:23 ` [PATCH 02/10] floppy: cleanup: expand macro UFDCS Willy Tarreau
2020-02-24 21:23 ` [PATCH 03/10] floppy: cleanup: expand macro UDP Willy Tarreau
2020-02-24 21:23 ` [PATCH 04/10] floppy: cleanup: expand macro UDRS Willy Tarreau
2020-02-24 21:23 ` [PATCH 05/10] floppy: cleanup: expand macro UDRWE Willy Tarreau
2020-02-24 21:23 ` [PATCH 06/10] floppy: cleanup: expand macro DP Willy Tarreau
2020-02-24 21:23 ` [PATCH 07/10] floppy: cleanup: expand macro DRS Willy Tarreau
2020-02-24 21:23 ` [PATCH 08/10] floppy: cleanup: expand macro DRWE Willy Tarreau
2020-02-24 21:23 ` [PATCH 09/10] floppy: cleanup: expand the R/W / format command macros Willy Tarreau
2020-02-24 21:23 ` [PATCH 10/10] floppy: cleanup: expand the reply_buffer macros Willy Tarreau
2020-02-26 8:07 ` [PATCH 11/16] floppy: remove dead code for drives scanning on ARM Willy Tarreau
2020-02-26 8:07 ` [PATCH 12/16] floppy: remove incomplete support for second FDC from ARM code Willy Tarreau
2020-02-29 16:38 ` Denis Efremov
2020-02-26 8:07 ` [PATCH 13/16] floppy: prepare ARM code to simplify base address separation Willy Tarreau
2020-02-26 8:07 ` [PATCH 14/16] floppy: introduce new functions fdc_inb() and fdc_outb() Willy Tarreau
2020-02-26 8:07 ` [PATCH 15/16] floppy: separate the FDC's base address from its registers Willy Tarreau
2020-02-26 15:36 ` Denis Efremov
2020-02-26 15:46 ` Willy Tarreau
2020-02-26 8:07 ` [PATCH 16/16] floppy: rename the global "fdc" variable to "current_fdc" Willy Tarreau
2020-03-01 8:21 ` [PATCH 11/16] floppy: remove dead code for drives scanning on ARM Denis Efremov
2020-03-01 8:59 ` Willy Tarreau
2020-02-26 14:57 ` [PATCH 00/10] floppy driver cleanups (deobfuscation) Denis Efremov
2020-02-26 17:49 ` Linus Torvalds
2020-02-26 18:41 ` Willy Tarreau
2020-02-29 14:13 ` Willy Tarreau
2020-02-29 15:58 ` Linus Torvalds
2020-02-29 23:19 ` Ondrej Zary
2020-03-01 6:46 ` Willy Tarreau
2020-03-01 17:01 ` Ondrej Zary
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