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In pci_alloc_map(), restore the original value of the BAR for

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the duration of the function.  The device we would otherwise
have left in an useless state may just as well be the low-level
console. When booting verbose, we do need it addressable if we
want to avoid a MCA.

Approved by: re (kensmith)
This commit is contained in:
Marcel Moolenaar 2007-07-29 02:44:41 +00:00
parent 24face5416
commit 7f67bed625
1 changed files with 8 additions and 0 deletions
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8
sys/dev/pci/pci.c
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@ -3265,6 +3265,14 @@ pci_alloc_map(device_t dev, device_t child, int type, int *rid,
map |= (pci_addr_t)pci_read_config(child, *rid + 4, 4) << 32;
if (pci_mapbase(testval) == 0)
goto out;
/*
* Restore the original value of the BAR. We may have reprogrammed
* the BAR of the low-level console device and when booting verbose,
* we need the console device addressable.
*/
pci_write_config(child, *rid, map, 4);
if (PCI_BAR_MEM(testval)) {
if (type != SYS_RES_MEMORY) {
if (bootverbose)