On Tue, Nov 24, 2009 at 06:21:21PM -0800, Yinghai Lu wrote:
>
> so could catch if the driver set the correct dma_mask.
Per gregkh's email last year, this needs documentation to go with it.
http://lkml.indiana.edu/hypermail/linux/kernel/0810.2/3595.html
Code is good.
Reviewed-by: Grant Grundler <grundler@xxxxxxxxxx>
thanks,
grant
>
> Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
>
> ---
> drivers/pci/pci-sysfs.c | 17 +++++++++++++++++
> 1 file changed, 17 insertions(+)
>
> Index: linux-2.6/drivers/pci/pci-sysfs.c
> ===================================================================
> --- linux-2.6.orig/drivers/pci/pci-sysfs.c
> +++ linux-2.6/drivers/pci/pci-sysfs.c
> @@ -184,6 +184,21 @@ numa_node_show(struct device *dev, struc
> #endif
>
> static ssize_t
> +dma_mask_bits_show(struct device *dev, struct device_attribute *attr, char *buf)
> +{
> + struct pci_dev *pdev = to_pci_dev(dev);
> +
> + return sprintf (buf, "%d\n", fls64(pdev->dma_mask));
> +}
> +
> +static ssize_t
> +consistent_dma_mask_bits_show(struct device *dev, struct device_attribute *attr,
> + char *buf)
> +{
> + return sprintf (buf, "%d\n", fls64(dev->coherent_dma_mask));
> +}
> +
> +static ssize_t
> msi_bus_show(struct device *dev, struct device_attribute *attr, char *buf)
> {
> struct pci_dev *pdev = to_pci_dev(dev);
> @@ -314,6 +329,8 @@ struct device_attribute pci_dev_attrs[]
> #ifdef CONFIG_NUMA
> __ATTR_RO(numa_node),
> #endif
> + __ATTR_RO(dma_mask_bits),
> + __ATTR_RO(consistent_dma_mask_bits),
> __ATTR(enable, 0600, is_enabled_show, is_enabled_store),
> __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR),
> broken_parity_status_show,broken_parity_status_store),
> --
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