This patch centralizes functions used to add and remove sysfs
entries for various capabilities. With this cleanup, the code
is more readable and easier for adding new capability related
functions.
Signed-off-by: Yu Zhao <yu.zhao@xxxxxxxxx>
---
drivers/pci/pci-sysfs.c | 118 +++++++++++++++++++++++++++-------------------
1 files changed, 69 insertions(+), 49 deletions(-)
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 00a9947..3ad7ce8 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -735,10 +735,40 @@ int __attribute__ ((weak)) pcibios_add_platform_entries(struct pci_dev *dev)
return 0;
}
+static int pci_create_capabilities_sysfs(struct pci_dev *dev)
+{
+ int retval;
+ struct bin_attribute *attr;
+
+ /* If the device has VPD, try to expose it in sysfs. */
+ if (dev->vpd) {
+ attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
+ if (!attr)
+ return -ENOMEM;
+
+ attr->size = dev->vpd->len;
+ attr->attr.name = "vpd";
+ attr->attr.mode = S_IRUSR | S_IWUSR;
+ attr->read = pci_read_vpd;
+ attr->write = pci_write_vpd;
+ retval = sysfs_create_bin_file(&dev->dev.kobj, attr);
+ if (retval) {
+ kfree(dev->vpd->attr);
+ return retval;
+ }
+ dev->vpd->attr = attr;
+ }
+
+ /* Active State Power Management */
+ pcie_aspm_create_sysfs_dev_files(dev);
+
+ return 0;
+}
+
int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
{
- struct bin_attribute *attr = NULL;
int retval;
+ struct bin_attribute *attr;
if (!sysfs_initialized)
return -EACCES;
@@ -750,69 +780,52 @@ int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
if (retval)
goto err;
- /* If the device has VPD, try to expose it in sysfs. */
- if (pdev->vpd) {
- attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
- if (attr) {
- pdev->vpd->attr = attr;
- attr->size = pdev->vpd->len;
- attr->attr.name = "vpd";
- attr->attr.mode = S_IRUSR | S_IWUSR;
- attr->read = pci_read_vpd;
- attr->write = pci_write_vpd;
- retval = sysfs_create_bin_file(&pdev->dev.kobj, attr);
- if (retval)
- goto err_vpd;
- } else {
- retval = -ENOMEM;
- goto err_config_file;
- }
- }
-
retval = pci_create_resource_files(pdev);
if (retval)
- goto err_vpd_file;
+ goto err_config_file;
/* If the device has a ROM, try to expose it in sysfs. */
if (pci_resource_len(pdev, PCI_ROM_RESOURCE) ||
(pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)) {
attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
- if (attr) {
- pdev->rom_attr = attr;
- attr->size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
- attr->attr.name = "rom";
- attr->attr.mode = S_IRUSR;
- attr->read = pci_read_rom;
- attr->write = pci_write_rom;
- retval = sysfs_create_bin_file(&pdev->dev.kobj, attr);
- if (retval)
- goto err_rom;
- } else {
+ if (!attr) {
retval = -ENOMEM;
goto err_resource_files;
}
+ attr->size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
+ attr->attr.name = "rom";
+ attr->attr.mode = S_IRUSR;
+ attr->read = pci_read_rom;
+ attr->write = pci_write_rom;
+ retval = sysfs_create_bin_file(&pdev->dev.kobj, attr);
+ if (retval) {
+ kfree(attr);
+ goto err_resource_files;
+ }
+ pdev->rom_attr = attr;
}
+
/* add platform-specific attributes */
- if (pcibios_add_platform_entries(pdev))
+ retval = pcibios_add_platform_entries(pdev);
+ if (retval)
goto err_rom_file;
- pcie_aspm_create_sysfs_dev_files(pdev);
+ /* add sysfs entries for various capabilities */
+ retval = pci_create_capabilities_sysfs(pdev);
+ if (retval)
+ goto err_rom_file;
return 0;
err_rom_file:
- if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
+ if (pci_resource_len(pdev, PCI_ROM_RESOURCE) ||
+ (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)) {
sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
-err_rom:
- kfree(pdev->rom_attr);
+ kfree(pdev->rom_attr);
+ pdev->rom_attr = NULL;
+ }
err_resource_files:
pci_remove_resource_files(pdev);
-err_vpd_file:
- if (pdev->vpd) {
- sysfs_remove_bin_file(&pdev->dev.kobj, pdev->vpd->attr);
-err_vpd:
- kfree(pdev->vpd->attr);
- }
err_config_file:
if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
@@ -822,6 +835,16 @@ err:
return retval;
}
+static void pci_remove_capabilities_sysfs(struct pci_dev *dev)
+{
+ if (dev->vpd && dev->vpd->attr) {
+ sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
+ kfree(dev->vpd->attr);
+ }
+
+ pcie_aspm_remove_sysfs_dev_files(dev);
+}
+
/**
* pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files
* @pdev: device whose entries we should free
@@ -833,12 +856,8 @@ void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
if (!sysfs_initialized)
return;
- pcie_aspm_remove_sysfs_dev_files(pdev);
+ pci_remove_capabilities_sysfs(pdev);
- if (pdev->vpd) {
- sysfs_remove_bin_file(&pdev->dev.kobj, pdev->vpd->attr);
- kfree(pdev->vpd->attr);
- }
if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
else
@@ -846,7 +865,8 @@ void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
pci_remove_resource_files(pdev);
- if (pci_resource_len(pdev, PCI_ROM_RESOURCE)) {
+ if (pci_resource_len(pdev, PCI_ROM_RESOURCE) ||
+ (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)) {
if (pdev->rom_attr) {
sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
kfree(pdev->rom_attr);
--
1.5.6.4
--
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