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| author | Stephen Hemminger <shemminger@vyatta.com> | 2008-12-18 09:17:16 -0800 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2009-01-07 11:13:18 -0800 |
| commit | db5679437a2b938c9127480a3923633721583a4f (patch) | |
| tree | b2625345baa35490104b81fc1c7bd8ef6bb74100 | |
| parent | 287d19ce2e67c15e79a187b3bdcbbea1a0a51a7d (diff) | |
| download | linux-3.10-db5679437a2b938c9127480a3923633721583a4f.tar.gz linux-3.10-db5679437a2b938c9127480a3923633721583a4f.tar.bz2 linux-3.10-db5679437a2b938c9127480a3923633721583a4f.zip | |
PCI: add interface to set visible size of VPD
The VPD on all devices may not be 32K. Unfortunately, there is no
generic way to find the size, so this adds a simple API hook
to reset it.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| -rw-r--r-- | drivers/pci/access.c | 23 | ||||
| -rw-r--r-- | include/linux/pci.h | 1 |
2 files changed, 24 insertions, 0 deletions
diff --git a/drivers/pci/access.c b/drivers/pci/access.c index 86ec4ad44bc..38144479477 100644 --- a/drivers/pci/access.c +++ b/drivers/pci/access.c @@ -340,6 +340,29 @@ int pci_vpd_pci22_init(struct pci_dev *dev) } /** + * pci_vpd_truncate - Set available Vital Product Data size + * @dev: pci device struct + * @size: available memory in bytes + * + * Adjust size of available VPD area. + */ +int pci_vpd_truncate(struct pci_dev *dev, size_t size) +{ + if (!dev->vpd) + return -EINVAL; + + /* limited by the access method */ + if (size > dev->vpd->len) + return -EINVAL; + + dev->vpd->len = size; + dev->vpd->attr->size = size; + + return 0; +} +EXPORT_SYMBOL(pci_vpd_truncate); + +/** * pci_block_user_cfg_access - Block userspace PCI config reads/writes * @dev: pci device struct * diff --git a/include/linux/pci.h b/include/linux/pci.h index 76079e10689..7cbecef19bb 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -690,6 +690,7 @@ int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap); /* Vital product data routines */ ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf); ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf); +int pci_vpd_truncate(struct pci_dev *dev, size_t size); /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */ void pci_bus_assign_resources(struct pci_bus *bus); |