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SubjectBug in "ide-pci.c"
Date
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<DIV><FONT face=Arial size=2>ide-pci.c bug:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>ide_setup_pci_baseregs()&nbsp;may inappropriately
report device as not capable of full native PCI:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>//&nbsp; BUGGY LINE: ============</FONT></DIV>
<DIV><FONT face=Arial size=2>&nbsp;&nbsp;&nbsp; if (pci_read_config_byte(dev,
PCI_CLASS_PROG, &amp;progif) || (progif &amp; 5) != 5)
{<BR>//&nbsp;&nbsp;=========&nbsp;&nbsp; TWO CONDITIONS USING PROGIF
</FONT></DIV>
<DIV><FONT face=Arial size=2>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; if ((progif &amp;
0xa) != 0xa) {<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; printk("%s:
device not capable of full native PCI mode\n",
name);<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; return
1;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;...</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;&nbsp;&nbsp;&nbsp;In the first line of code above there is no
guarantee that the first condition will be&nbsp;executed</DIV>
<DIV>before the second.&nbsp; As progif is set to 0 before this block of code,
the second test will always</DIV>
<DIV>be true if it is executed prior to the first.</DIV>
<DIV>&nbsp;</DIV>
<DIV></FONT>&nbsp;</DIV></BODY></HTML>
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