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| author | Jason S. McMullan <jason.mcmullan@netronome.com> | 2015-09-30 15:35:05 +0900 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2017-10-12 15:28:19 +0100 |
| commit | 17e9bf7c3baba5000d47b83e3b9e6062c080806e (patch) | |
| tree | 0d340d9c9efbeb1df7be63088a441c1d204186f0 /drivers | |
| parent | af84302a01a814250cfcfb86628349a827497779 (diff) | |
| download | linux-stable-17e9bf7c3baba5000d47b83e3b9e6062c080806e.tar.gz linux-stable-17e9bf7c3baba5000d47b83e3b9e6062c080806e.tar.bz2 linux-stable-17e9bf7c3baba5000d47b83e3b9e6062c080806e.zip | |
PCI: Support PCIe devices with short cfg_size
commit c20aecf6963d1273d8f6d61c042b4845441ca592 upstream.
If a device quirk modifies the pci_dev->cfg_size to be less than
PCI_CFG_SPACE_EXP_SIZE (4096), but greater than PCI_CFG_SPACE_SIZE (256),
the PCI sysfs interface truncates the readable size to PCI_CFG_SPACE_SIZE.
Allow sysfs access to config space up to cfg_size, even if the device
doesn't support the entire 4096-byte PCIe config space.
Note that pci_read_config() and pci_write_config() limit access to
dev->cfg_size even though pcie_config_attr contains 4096 (the maximum
size).
Signed-off-by: Jason S. McMullan <jason.mcmullan@netronome.com>
[simon: edited changelog]
Signed-off-by: Simon Horman <simon.horman@netronome.com>
[bhelgaas: more changelog edits]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/pci/pci-sysfs.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 7505fa72ea5d..0ca2961a56a2 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -1367,10 +1367,10 @@ int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev) if (!sysfs_initialized) return -EACCES; - if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) - retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr); - else + if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) retval = sysfs_create_bin_file(&pdev->dev.kobj, &pcie_config_attr); + else + retval = sysfs_create_bin_file(&pdev->dev.kobj, &pci_config_attr); if (retval) goto err; @@ -1422,10 +1422,10 @@ err_rom_file: err_resource_files: pci_remove_resource_files(pdev); err_config_file: - if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) - sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); - else + if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); + else + sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); err: return retval; } @@ -1459,10 +1459,10 @@ void pci_remove_sysfs_dev_files(struct pci_dev *pdev) pci_remove_capabilities_sysfs(pdev); - if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE) - sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); - else + if (pdev->cfg_size > PCI_CFG_SPACE_SIZE) sysfs_remove_bin_file(&pdev->dev.kobj, &pcie_config_attr); + else + sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); pci_remove_resource_files(pdev); |