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Message-ID: <8332cf70-1451-6903-562f-1d16e4c243ae@omp.ru>
Date: Wed, 18 Oct 2023 20:15:25 +0300
From: Sergey Shtylyov <s.shtylyov@....ru>
To: Haonan Li <lihaonan1105@...il.com>,
Damien Le Moal <dlemoal@...nel.org>,
<linux-ide@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] pata_lagacy: Handle failed ATA timing computation in
opti82c46x_set_piomode
Hello!
On 10/18/23 3:52 AM, Haonan Li wrote:
> The function opti82c46x_set_piomode utilizes the ata_timing_compute()
> to determine the appropriate ATA timings for a given device. However,
> in certain conditions where the ata_timing_find_mode() function does
> not find a valid mode, ata_timing_compute() returns an error (-EINVAL),
> leaving the tp struct uninitialized.
Looks like it's very common to ignore the result of ata_timing_compute()
in drivers/ata/...
Mind sharing the "certain conditions"? :-) I don't think the set_piomode()
method can be called by libata itself with an unsupported xfer mode...
> This patch checks the return value of ata_timing_compute() and print
> err message. This avoids any potential use of uninitialized `tp`
> struct in the opti82c46x_set_piomode function.
>
> Signed-off-by: Haonan Li <lihaonan1105@...il.com>
[...]
Reviewed-by: Sergey Shtylyov <s.shtylyov@....ru>
MBR, Sergey
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