On Thu, Jun 13, 2013 at 10:06 AM, Sujit Reddy Thumma
<sthumma@xxxxxxxxxxxxxx> wrote:
> On 6/12/2013 11:04 AM, Santosh Y wrote:
>>>
>>>
>>> /**
>>> + * ufshcd_query_request() - API for issuing query request to the
>>> device.
>>> + * @hba: ufs driver context
>>> + * @query: params for query request
>>> + * @descriptor: buffer for sending/receiving descriptor
>>> + * @retries: number of times to try executing the command
>>> + *
>>> + * All necessary fields for issuing a query and receiving its response
>>> + * are stored in the UFS hba struct. We can use this method since we
>>> know
>>> + * there is only one active query request or any internal command at
>>> all
>>> + * times.
>>> + */
>>> +static int ufshcd_send_query_request(struct ufs_hba *hba,
>>> + struct ufs_query_req *query,
>>> + u8 *descriptor,
>>> + struct ufs_query_res *response)
>>> +{
>>> + int ret;
>>> +
>>> + BUG_ON(!hba);
>>> + if (!query || !response) {
>>> + dev_err(hba->dev,
>>> + "%s: NULL pointer query = %p, response = %p\n",
>>> + __func__, query, response);
>>> + return -EINVAL;
>>> + }
>>> +
>>> + mutex_lock(&hba->i_cmd.dev_cmd_lock);
>>> + hba->i_cmd.query.request = query;
>>> + hba->i_cmd.query.response = response;
>>> + hba->i_cmd.query.descriptor = descriptor;
>>> +
>>> + ret = ufshcd_exec_internal_cmd(hba, DEV_CMD_TYPE_QUERY,
>>> + QUERY_REQ_TIMEOUT);
>>
>>
>> Can this be generic, as external query commands might also use it?
>
>
> External query commands can call ufshcd_send_query_request() directly,
> without going into hassle of taking mutex lock and filling internal cmd
> structure.
>
I was not clear.
It might be confusing that user issued query commands also use methods
with name *internal_cmd*.
>
>>
>>> +
>>> + hba->i_cmd.query.request = NULL;
>>> + hba->i_cmd.query.response = NULL;
>>> + hba->i_cmd.query.descriptor = NULL;
>>> + mutex_unlock(&hba->i_cmd.dev_cmd_lock);
>>> +
>>> + return ret;
>>> +}
>>> +
>>> +/**
>>
>>
>>
>
> --
> Regards,
> Sujit
--
~Santosh
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