#6847: Hard disks not shuting down cleanly (does not park heads)
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Reporter: aldeck | Owner: marcusoverhagen
Type: bug | Status: new
Priority: critical | Milestone: R1
Component: | Version: R1/alpha2
Drivers/Disk | Keywords: hard disk drive park heads shutdown
Resolution: | Blocking: 8657
Blocked By: 8112 | Platform: All
Has a Patch: 0 |
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Comment (by philcostin):
CppCheck reveals "Shifting by a negative value is undefined behaviour" in
src/add-ons/kernel/busses/ata/ide_isa/ide_isa.c (line 123)
In write_command_block_regs
for (i=0; i<7; i++)
if (((1 << (i-7)) & mask != 0) <----
This means that it is undefined as to when the following call to
channel->isa->write_io_8() occurs.
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Ticket URL: <https://dev.haiku-os.org/ticket/6847#comment:13>
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