linux-kernel - Re: [PATCH v7 05/10] tpm, tpm_tis: Only handle supported interrupts

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Date:   Mon, 29 Aug 2022 10:03:13 +0200
From:   Lino Sanfilippo <l.sanfilippo@...bus.com>
To:     Jason Andryuk <jandryuk@...il.com>
Cc:     Peter Huewe <peterhuewe@....de>,
        Jarkko Sakkinen <jarkko@...nel.org>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Stefan Berger <stefanb@...ux.vnet.ibm.com>,
        linux@...ewoehner.de, linux-integrity@...r.kernel.org,
        open list <linux-kernel@...r.kernel.org>, lukas@...ner.de,
        p.rosenberger@...bus.com
Subject: Re: [PATCH v7 05/10] tpm, tpm_tis: Only handle supported interrupts


Hi Jason,

On 26.08.22 19:43, Jason Andryuk wrote:
> On Wed, Jun 29, 2022 at 7:28 PM Lino Sanfilippo <LinoSanfilippo@....de> wrote:
> 
>> @@ -1007,8 +1029,39 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq,
>>         if (rc < 0)
>>                 goto out_err;
>>
>> -       intmask |= TPM_INTF_CMD_READY_INT | TPM_INTF_LOCALITY_CHANGE_INT |
>> -                  TPM_INTF_DATA_AVAIL_INT | TPM_INTF_STS_VALID_INT;
>> +       /* Figure out the capabilities */
>> +       rc = tpm_tis_read32(priv, TPM_INTF_CAPS(priv->locality), &intfcaps);
>> +       if (rc < 0)
>> +               goto out_err;
>> +
>> +       dev_dbg(dev, "TPM interface capabilities (0x%x):\n",
>> +               intfcaps);
>> +       if (intfcaps & TPM_INTF_BURST_COUNT_STATIC)
>> +               dev_dbg(dev, "\tBurst Count Static\n");
>> +       if (intfcaps & TPM_INTF_CMD_READY_INT) {
>> +               intmask |= TPM_INTF_CMD_READY_INT;
>> +               dev_dbg(dev, "\tCommand Ready Int Support\n");
>> +       }
>> +       if (intfcaps & TPM_INTF_INT_EDGE_FALLING)
>> +               dev_dbg(dev, "\tInterrupt Edge Falling\n");
>> +       if (intfcaps & TPM_INTF_INT_EDGE_RISING)
>> +               dev_dbg(dev, "\tInterrupt Edge Rising\n");
>> +       if (intfcaps & TPM_INTF_INT_LEVEL_LOW)
>> +               dev_dbg(dev, "\tInterrupt Level Low\n");
>> +       if (intfcaps & TPM_INTF_INT_LEVEL_HIGH)
>> +               dev_dbg(dev, "\tInterrupt Level High\n");
>> +       if (intfcaps & TPM_INTF_LOCALITY_CHANGE_INT)
> 
> Hi, you may already have fixed this, but I just saw:
> 
> error: this ‘if’ clause does not guard... [-Werror=misleading-indentation]
>  1144 |         if (intfcaps & TPM_INTF_LOCALITY_CHANGE_INT)
>       |         ^~
> 
>> +               intmask |= TPM_INTF_LOCALITY_CHANGE_INT;
>> +               dev_dbg(dev, "\tLocality Change Int Support\n");
> 
> You need { } for the block.
> 

thanks for pointing at this, I will fix it in the next version of this series.

Regards,
Lino


> Regards,
> Jason