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By popular request: Change the invalid device number and add a comment

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explaining the reasons behind it. Oh well, at least the commit count raises...


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30644 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Michael Lotz
2009-05-06 13:09:01 +00:00
parent 03a574d8cd
commit f8c16a4508
1 changed files with 5 additions and 1 deletions
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src/add-ons/kernel/bus_managers/ata/ATAChannel.cpp
+5 -1
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@@ -293,7 +293,11 @@ ATAChannel::SelectedDevice()
ata_task_file taskFile; ata_task_file taskFile;
if (_ReadRegs(&taskFile, ATA_MASK_DEVICE_HEAD) != B_OK) { if (_ReadRegs(&taskFile, ATA_MASK_DEVICE_HEAD) != B_OK) {
TRACE_ERROR("reading register failed when detecting selected device\n"); TRACE_ERROR("reading register failed when detecting selected device\n");
return 2; // Return an invalid device number so that the
// SelectedDevice() == "expected device" check fails.
// Due to the device number being a bit, we can't really get values
// other than 0 and 1, so anything >= 2 can be regarded as invalid.
return 234;
} }
return taskFile.lba.device; return taskFile.lba.device;