diff options
| author | raj <raj@FreeBSD.org> | 2009-01-09 12:38:41 +0000 |
|---|---|---|
| committer | raj <raj@FreeBSD.org> | 2009-01-09 12:38:41 +0000 |
| commit | aa56a975c17dac5562552bb238277fd96c124da2 (patch) | |
| tree | a278815d6b12a2554f0b255cdc587beb487689b0 /sys/arm | |
| parent | b57ad9857ef69dc51d61f6167363313a8fe8e59f (diff) | |
| download | FreeBSD-src-aa56a975c17dac5562552bb238277fd96c124da2.zip FreeBSD-src-aa56a975c17dac5562552bb238277fd96c124da2.tar.gz | |
Check PCIE link status before accessing the bus.
Some 88F5182-based systems (Linkstation) have problems when PCIE is
accessed without any peripherals present.
Diffstat (limited to 'sys/arm')
| -rw-r--r-- | sys/arm/mv/mv_pci.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sys/arm/mv/mv_pci.c b/sys/arm/mv/mv_pci.c index 0c893bfd..61a64a1 100644 --- a/sys/arm/mv/mv_pci.c +++ b/sys/arm/mv/mv_pci.c @@ -80,6 +80,7 @@ __FBSDID("$FreeBSD$"); #define PCIE_REG_STATUS 0x1A04 #define PCIE_REG_IRQ_MASK 0x1910 +#define STATUS_LINK_DOWN 1 #define STATUS_BUS_OFFS 8 #define STATUS_BUS_MASK (0xFF << STATUS_BUS_OFFS) #define STATUS_DEV_OFFS 16 @@ -436,6 +437,8 @@ pcib_mbus_probe(device_t self) P2P_CONF_DEV_OFFS; } else { val = bus_space_read_4(sc->sc_bst, sc->sc_bsh, PCIE_REG_STATUS); + if (val & STATUS_LINK_DOWN) + goto out; bus = sc->sc_busnr = (val & STATUS_BUS_MASK) >> STATUS_BUS_OFFS; dev = sc->sc_devnr = (val & STATUS_DEV_MASK) >> STATUS_DEV_OFFS; } |
