diff options
| author | scottl <scottl@FreeBSD.org> | 2013-08-12 23:30:01 +0000 |
|---|---|---|
| committer | scottl <scottl@FreeBSD.org> | 2013-08-12 23:30:01 +0000 |
| commit | 28bd1409da1e9911c4152b06c5c7b89235e2b17a (patch) | |
| tree | 34ad11c71aadd28f5ff680b63e3f0fd70956bed5 /sys/dev/fxp | |
| parent | c8a53736fe9139a202d17ed7f95389d33326cb61 (diff) | |
| download | FreeBSD-src-28bd1409da1e9911c4152b06c5c7b89235e2b17a.zip FreeBSD-src-28bd1409da1e9911c4152b06c5c7b89235e2b17a.tar.gz | |
Update PCI drivers to no longer look at the MEMIO-enabled bit in the PCI
command register. The lazy BAR allocation code in FreeBSD sometimes
disables this bit when it detects a range conflict, and will re-enable
it on demand when a driver allocates the BAR. Thus, the bit is no longer
a reliable indication of capability, and should not be checked. This
results in the elimination of a lot of code from drivers, and also gives
the opportunity to simplify a lot of drivers to use a helper API to set
the busmaster enable bit.
This changes fixes some recent reports of disk controllers and their
associated drives/enclosures disappearing during boot.
Submitted by: jhb
Reviewed by: jfv, marius, achadd, achim
MFC after: 1 day
Diffstat (limited to 'sys/dev/fxp')
| -rw-r--r-- | sys/dev/fxp/if_fxp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/dev/fxp/if_fxp.c b/sys/dev/fxp/if_fxp.c index 11b105e..1896d90 100644 --- a/sys/dev/fxp/if_fxp.c +++ b/sys/dev/fxp/if_fxp.c @@ -452,7 +452,6 @@ fxp_attach(device_t dev) * Enable bus mastering. */ pci_enable_busmaster(dev); - val = pci_read_config(dev, PCIR_COMMAND, 2); /* * Figure out which we should try first - memory mapping or i/o mapping? @@ -610,6 +609,7 @@ fxp_attach(device_t dev) * is a valid cacheline size (8 or 16 dwords), then tell * the board to turn on MWI. */ + val = pci_read_config(dev, PCIR_COMMAND, 2); if (val & PCIM_CMD_MWRICEN && pci_read_config(dev, PCIR_CACHELNSZ, 1) != 0) sc->flags |= FXP_FLAG_MWI_ENABLE; |
