linux-kernel - Re: [PATCH] tpm_infineon: add support for devices in mmio space

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Message-Id: <20070307133326.fcf6f891.akpm@linux-foundation.org>
Date:	Wed, 7 Mar 2007 13:33:26 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Alex Williamson <alex.williamson@...com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	Marcel Selhorst <tpm@...horst.net>,
	Kylene Jo Hall <kjhall@...ibm.com>
Subject: Re: [PATCH] tpm_infineon: add support for devices in mmio space

On Wed, 07 Mar 2007 10:58:10 -0700
Alex Williamson <alex.williamson@...com> wrote:

>  			 dev->name, dev_id->id);
> -		if (!((TPM_INF_BASE >> 8) & 0xff)) {
> +		if (!((tpm_dev.data_regs >> 8) & 0xff)) {
>  			rc = -EINVAL;
>  			goto err_last;
>  		}
>  		/* publish my base address and request region */
> -		if (request_region
> -		    (TPM_INF_BASE, TPM_INF_PORT_LEN, "tpm_infineon0") == NULL) {
> +		if (request_region(tpm_dev.data_regs, tpm_dev.data_size,
> +				   "tpm_infineon0") == NULL) {
>  			rc = -EINVAL;
>  			goto err_last;
>  		}
> -		if (request_region
> -		    (TPM_INF_ADDR, TPM_INF_ADDR_LEN, "tpm_infineon0") == NULL) {
> +		if (request_region(tpm_dev.config_port, tpm_dev.config_size,
> +				   "tpm_infineon0") == NULL) {
>  			rc = -EINVAL;
>  			goto err_last;
>  		}
> +	} else if (pnp_mem_valid(dev, 0) &&
> +	           !(pnp_mem_flags(dev, 0) & IORESOURCE_DISABLED)) {
> +
> +	    	tpm_dev.iotype = TPM_INF_IO_MEM;
> +
> +		tpm_dev.map_base = pnp_mem_start(dev, 0);
> +		tpm_dev.map_size = pnp_mem_len(dev, 0);
> +
> +		dev_info(&dev->dev, "Found %s with ID %s\n",
> +			 dev->name, dev_id->id);
> +
> +		/* publish my base address and request region */
> +		if (request_mem_region(tpm_dev.map_base, tpm_dev.map_size,
> +				       "tpm_infineon0") == NULL) {
> +			rc = -EINVAL;
> +			goto err_last;
> +		}
> +
> +		tpm_dev.mem_base = ioremap(tpm_dev.map_base, tpm_dev.map_size);
> +		if (tpm_dev.mem_base == NULL) {
> +			rc = -EINVAL;
> +			goto err_last;
> +		}
>
> ...
>
> err_last:
>	return rc;
> }
	
tpm_inf_pnp_probe() leaks resources all over the place if something goes
wrong.

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