This is a note to let you know that I've just added the patch titled
PCI: Support PCIe devices with short cfg_size
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pci-support-pcie-devices-with-short-cfg_size.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c20aecf6963d1273d8f6d61c042b4845441ca592 Mon Sep 17 00:00:00 2001
From: "Jason S. McMullan" <jason.mcmullan@xxxxxxxxxxxxx>
Date: Wed, 30 Sep 2015 15:35:05 +0900
Subject: PCI: Support PCIe devices with short cfg_size
From: Jason S. McMullan <jason.mcmullan@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxx>
[simon: edited changelog]
Signed-off-by: Simon Horman <simon.horman@xxxxxxxxxxxxx>
[bhelgaas: more changelog edits]
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/pci/pci-sysfs.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -1372,10 +1372,10 @@ int __must_check pci_create_sysfs_dev_fi
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;
@@ -1427,10 +1427,10 @@ 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;
}
@@ -1464,10 +1464,10 @@ void pci_remove_sysfs_dev_files(struct p
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);
Patches currently in stable-queue which might be from jason.mcmullan@xxxxxxxxxxxxx are
queue-4.4/pci-limit-config-space-size-for-netronome-nfp6000-family.patch
queue-4.4/pci-support-pcie-devices-with-short-cfg_size.patch
queue-4.4/pci-add-netronome-vendor-and-device-ids.patch
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