Commit bb965401 authored by Yinghai Lu's avatar Yinghai Lu Committed by Jesse Barnes
Browse files

PCI: show dma_mask bits in /sys 



So we can catch if the driver sets an incorrect dma_mask.

Reviewed-by: default avatarGrant Grundler <grundler@google.com>
Signed-off-by: default avatarYinghai Lu <yinghai@kernel.org>
Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
parent c6a41576

drivers/pci/pci-sysfs.c

+17 −0
Original line number Diff line number Diff line
@@ -183,6 +183,21 @@ numa_node_show(struct device *dev, struct device_attribute *attr, char *buf) 
}

#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)

{
@@ -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),