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authorMatt Carlson <mcarlson@broadcom.com>2010-02-26 17:04:43 +0300
committerDavid S. Miller <davem@davemloft.net>2010-02-28 11:43:33 +0300
commit4067a8541d397e9d6b443dd2ce0ecb78bfd991db (patch)
tree49690419b218020b8a0e9381db2f9cc90b658cd0 /drivers/pci
parente1d5bdabb94da89bdb3c3f2ee105cf61fca88ec8 (diff)
downloadlinux-4067a8541d397e9d6b443dd2ce0ecb78bfd991db.tar.xz
pci: Add helper to search for VPD keywords
This patch adds the pci_vpd_find_info_keyword() helper function to find information field keywords within read-only and read-write large resource data type sections. Signed-off-by: Matt Carlson <mcarlson@broadcom.com> Signed-off-by: Michael Chan <mchan@broadcom.com> Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/vpd.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c
index 6bc554576f8d..a5a5ca17cfe6 100644
--- a/drivers/pci/vpd.c
+++ b/drivers/pci/vpd.c
@@ -41,3 +41,21 @@ int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt)
return -ENOENT;
}
EXPORT_SYMBOL_GPL(pci_vpd_find_tag);
+
+int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
+ unsigned int len, const char *kw)
+{
+ int i;
+
+ for (i = off; i + PCI_VPD_INFO_FLD_HDR_SIZE <= off + len;) {
+ if (buf[i + 0] == kw[0] &&
+ buf[i + 1] == kw[1])
+ return i;
+
+ i += PCI_VPD_INFO_FLD_HDR_SIZE +
+ pci_vpd_info_field_size(&buf[i]);
+ }
+
+ return -ENOENT;
+}
+EXPORT_SYMBOL_GPL(pci_vpd_find_info_keyword);