linux-kernel - Re: [PATCH net-next v2 0/2] net: ipa: fix validation

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Date:   Mon, 22 Mar 2021 08:22:20 -0500
From:   Alex Elder <elder@...aro.org>
To:     davem@...emloft.net, kuba@...nel.org
Cc:     leon@...nel.org, andrew@...n.ch, bjorn.andersson@...aro.org,
        evgreen@...omium.org, cpratapa@...eaurora.org,
        subashab@...eaurora.org, elder@...nel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v2 0/2] net: ipa: fix validation

On 3/20/21 9:17 AM, Alex Elder wrote:
> There is sanity checking code in the IPA driver that's meant to be
> enabled only during development.  This allows the driver to make
> certain assumptions, but not have to verify those assumptions are
> true at (operational) runtime.  This code is built conditional on
> IPA_VALIDATION, set (if desired) inside the IPA makefile.
> 
> Unfortunately, this validation code has some errors.  First, there
> are some mismatched arguments supplied to some dev_err() calls in
> ipa_cmd_table_valid() and ipa_cmd_header_valid(), and these are
> exposed if validation is enabled.  Second, the tag that enables
> this conditional code isn't used consistently (it's IPA_VALIDATE
> in some spots and IPA_VALIDATION in others).
> 
> This series fixes those two problems with the conditional validation
> code.

After much back-and-forth with Leon Romanovsky:

	--> I retract this series <--

I will include these patches in a future series that will
do cleanup of this validation code more completely.

Thanks.

					-Alex

> Version 2 removes the two patches that introduced ipa_assert().  It
> also modifies the description in the first patch so that it mentions
> the changes made to ipa_cmd_table_valid().
> 
> 					-Alex
> 
> Alex Elder (2):
>    net: ipa: fix init header command validation
>    net: ipa: fix IPA validation
> 
>   drivers/net/ipa/Makefile       |  2 +-
>   drivers/net/ipa/gsi_trans.c    |  8 ++---
>   drivers/net/ipa/ipa_cmd.c      | 54 ++++++++++++++++++++++------------
>   drivers/net/ipa/ipa_cmd.h      |  6 ++--
>   drivers/net/ipa/ipa_endpoint.c |  6 ++--
>   drivers/net/ipa/ipa_main.c     |  6 ++--
>   drivers/net/ipa/ipa_mem.c      |  6 ++--
>   drivers/net/ipa/ipa_table.c    |  6 ++--
>   drivers/net/ipa/ipa_table.h    |  6 ++--
>   9 files changed, 58 insertions(+), 42 deletions(-)
>