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| author | Yinghai Lu | 2009-11-25 03:21:21 +0100 |
|---|---|---|
| committer | Jesse Barnes | 2009-12-05 00:47:50 +0100 |
| commit | bb965401fd2afa26629b244e7bb2e48a117dc238 (patch) | |
| tree | 72627abb2f9f65ced77c6c10709e42948fed0592 | |
| parent | PCI: add debug output for DMA mask info (diff) | |
| download | kernel-qcow2-linux-bb965401fd2afa26629b244e7bb2e48a117dc238.tar.gz kernel-qcow2-linux-bb965401fd2afa26629b244e7bb2e48a117dc238.tar.xz kernel-qcow2-linux-bb965401fd2afa26629b244e7bb2e48a117dc238.zip | |
PCI: show dma_mask bits in /sys
So we can catch if the driver sets an incorrect dma_mask.
Reviewed-by: Grant Grundler <grundler@google.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| -rw-r--r-- | drivers/pci/pci-sysfs.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 0fa707e2a0f8..c5df94e86678 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -184,6 +184,21 @@ 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) { 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), |