linux-kernel - Re: [PATCH 2/2] scsi: ufs: Set fDeviceInit flag to initiate device initialization

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Date:	Wed, 12 Jun 2013 11:04:43 +0530
From:	Santosh Y <santoshsy@...il.com>
To:	Dolev Raviv <draviv@...eaurora.org>
Cc:	linux-scsi@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	Sujit Reddy Thumma <sthumma@...eaurora.org>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] scsi: ufs: Set fDeviceInit flag to initiate device initialization

>
>  /**
> + *  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?

> +
> +       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;
> +}
> +
> +/**


-- 
~Santosh
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