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authorIsaku Yamahata <yamahata@valinux.co.jp>2009-10-30 21:21:04 +0900
committerAnthony Liguori <aliguori@us.ibm.com>2009-11-09 08:43:07 -0600
commit5029fe12dccbe261d5bd5bc840110ae48aa112c9 (patch)
tree8d737f9433cbff89948b0a9f33386a8420dba666 /hw
parent0392a017ae9b44dd5c29bf7769a96fd6806a3551 (diff)
pci: clean up of pci_default_read_config.
This patch cleans up pci_default_read_config() removing ugly length and range check. Suggested by "Michael S. Tsirkin" <mst@redhat.com> Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'hw')
-rw-r--r--hw/pci.c26
1 files changed, 5 insertions, 21 deletions
diff --git a/hw/pci.c b/hw/pci.c
index 91acb85e2d..6b89177aab 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -558,27 +558,11 @@ static void pci_update_mappings(PCIDevice *d)
uint32_t pci_default_read_config(PCIDevice *d,
uint32_t address, int len)
{
- uint32_t val;
-
- switch(len) {
- default:
- case 4:
- if (address <= 0xfc) {
- val = pci_get_long(d->config + address);
- break;
- }
- /* fall through */
- case 2:
- if (address <= 0xfe) {
- val = pci_get_word(d->config + address);
- break;
- }
- /* fall through */
- case 1:
- val = pci_get_byte(d->config + address);
- break;
- }
- return val;
+ uint32_t val = 0;
+ assert(len == 1 || len == 2 || len == 4);
+ len = MIN(len, PCI_CONFIG_SPACE_SIZE - address);
+ memcpy(&val, d->config + address, len);
+ return le32_to_cpu(val);
}
void pci_default_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int l)