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Code Issues Releases Activity

When writing to PCI configuration registers, don't immediately

Browse Source 
read the same register back. It can cause hangs or machine
checks in certain cases. One particular case is with bge(4)
when a reset is initiated for the controller.

MFC after: 1 month
This commit is contained in:
Marcel Moolenaar 2007-04-01 06:15:53 +00:00
parent 304168a8af
commit 37402373e9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=168200
1 changed files with 0 additions and 3 deletions
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3
sys/powerpc/powermac/uninorth.c
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@ -303,15 +303,12 @@ uninorth_write_config(device_t dev, u_int bus, u_int slot, u_int func,
switch (width) {
case 1:
out8rb(caoff, val);
(void)in8rb(caoff);
break;
case 2:
out16rb(caoff, val);
(void)in16rb(caoff);
break;
case 4:
out32rb(caoff, val);
(void)in32rb(caoff);
break;
}
}