linux-kernel - Re: [PATCH] fTPM: fix PTR

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Date:   Fri, 12 Jul 2019 18:34:24 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Arnd Bergmann <arnd@...db.de>, Peter Huewe <peterhuewe@....de>
Cc:     Thirupathaiah Annapureddy <thiruan@...rosoft.com>,
        Sasha Levin <sashal@...nel.org>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fTPM: fix PTR_ERR() usage

On Fri, 2019-07-12 at 13:49 +0200, Arnd Bergmann wrote:
> A last minute change must have confused PTR_ERR() and ERR_PTR():
> 
> drivers/char/tpm/tpm_ftpm_tee.c:236:15: error: incompatible pointer to integer
> conversion passing 'struct tee_context *' to parameter of type 'long' [-
> Werror,-Wint-conversion]
>                 if (ERR_PTR(pvt_data->ctx) == -ENOENT)
> drivers/char/tpm/tpm_ftpm_tee.c:239:18: error: incompatible pointer to integer
> conversion passing 'struct tee_context *' to parameter of type 'long' [-
> Werror,-Wint-conversion]
>                 return ERR_PTR(pvt_data->ctx);
> 
> Fixes: c975c3911cc2 ("fTPM: firmware TPM running in TEE")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Arnd, thanks.

I squashed this to the associated commit.

I also fine-tuned the commit messages a bit (tag, imperative form).

Started also wondering tha tpm_ftpm_tee is a too generic name given that
this is for ARM TZ only. Would it make sense to rename it as something
like tpm_ftpm_tee_arm? Other proposals are welcome. Just made something
up.


/Jarkko