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Commit bb965401fd2afa26629b244e7bb2e48a117dc238

Authored by Yinghai Lu
Committed by Jesse Barnes
1 parent c6a415761c
Exists in master and in 7 other branches imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-l5.0.0_1.0.0-ga

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>

Showing 1 changed file with 17 additions and 0 deletions Side-by-side Diff

drivers/pci/pci-sysfs.c
Diff comments   View file @ bb96540
... ... @@ -184,6 +184,21 @@
184 184 #endif
185 185  
186 186 static ssize_t
  187 +dma_mask_bits_show(struct device *dev, struct device_attribute *attr, char *buf)
  188 +{
  189 + struct pci_dev *pdev = to_pci_dev(dev);
  190 +
  191 + return sprintf (buf, "%d\n", fls64(pdev->dma_mask));
  192 +}
  193 +
  194 +static ssize_t
  195 +consistent_dma_mask_bits_show(struct device *dev, struct device_attribute *attr,
  196 + char *buf)
  197 +{
  198 + return sprintf (buf, "%d\n", fls64(dev->coherent_dma_mask));
  199 +}
  200 +
  201 +static ssize_t
187 202 msi_bus_show(struct device *dev, struct device_attribute *attr, char *buf)
188 203 {
189 204 struct pci_dev *pdev = to_pci_dev(dev);
... ... @@ -314,6 +329,8 @@
314 329 #ifdef CONFIG_NUMA
315 330 __ATTR_RO(numa_node),
316 331 #endif
  332 + __ATTR_RO(dma_mask_bits),
  333 + __ATTR_RO(consistent_dma_mask_bits),
317 334 __ATTR(enable, 0600, is_enabled_show, is_enabled_store),
318 335 __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR),
319 336 broken_parity_status_show,broken_parity_status_store),