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| author | Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> | 2014-07-30 10:39:37 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2014-07-31 07:29:12 +0200 |
| commit | e5a91ee5443c05a2b484f78335d5d7d1d629f623 (patch) | |
| tree | 567f4dd85f1376537bf039edd0f52c733f39d0d1 /drivers/pci/pci.c | |
| parent | 166a6ba9559c109d27a1db822214fc6866dfb953 (diff) | |
| download | barebox-e5a91ee5443c05a2b484f78335d5d7d1d629f623.tar.gz barebox-e5a91ee5443c05a2b484f78335d5d7d1d629f623.tar.xz | |
pci: ensure device does ignore BAR mangling
Disable access to PCI devices I/O and memory regions while
mangling BAR registers.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/pci/pci.c')
| -rw-r--r-- | drivers/pci/pci.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index f58e2c98f1..b64f25d132 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -191,6 +191,10 @@ unsigned int pci_scan_bus(struct pci_bus *bus) continue; } + pci_read_config_byte(dev, PCI_COMMAND, &cmd); + pci_write_config_byte(dev, PCI_COMMAND, + cmd & ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY)); + for (bar = 0; bar < 6; bar++) { resource_size_t last_addr; @@ -233,6 +237,7 @@ unsigned int pci_scan_bus(struct pci_bus *bus) bar++; } + pci_write_config_byte(dev, PCI_COMMAND, cmd); list_add_tail(&dev->bus_list, &bus->devices); pci_register_device(dev); } |