[Qemu-devel] [Bug 1219234] [NEW] -device ide-hd will assign bus with with no free units

[Cole Robinson]

Public bug reported:

Originally filed here:
https://bugzilla.redhat.com/show_bug.cgi?id=1000118

./x86_64-softmmu/qemu-system-x86_64 -device ahci -drive 
id=aa,file=/tmp/foo,if=none -drive id=bb,file=/tmp/foo,if=none -device 
ide-hd,drive=aa -device ide-hd,drive=bb
qemu-system-x86_64: -device ide-hd,drive=bb: Can't create IDE unit 1, bus 
supports only 1 units
qemu-system-x86_64: -device ide-hd,drive=bb: Device initialization failed.
qemu-system-x86_64: -device ide-hd,drive=bb: Device 'ide-hd' could not be 
initialized

If a bus isn't specified for -device ide-hd, it just uses the first bus
it finds, not taking into account if that bus was already assigned for
another device. So users are forced to do -device ide-hd,bus=ide.0
-device ide-hd,bus=ide.1, etc.

This isn't specific to -device ahci, but it's worse there since there
isn't any -drive if=IDE or -hda convenience option, which both seem to
get the logic correct.

I know -device is the 'build it yourself' approach so I understand if
this is WONTFIX.

This is affects qemu.git as of today (8-31-2013)

** Affects: qemu
     Importance: Undecided
         Status: New

** Description changed:

  Originally filed here:
  https://bugzilla.redhat.com/show_bug.cgi?id=1000118
  
  ./x86_64-softmmu/qemu-system-x86_64 -device ahci -drive 
id=aa,file=/tmp/foo,if=none -drive id=bb,file=/tmp/foo,if=none -device 
ide-hd,drive=aa -device ide-hd,drive=bb
  qemu-system-x86_64: -device ide-hd,drive=bb: Can't create IDE unit 1, bus 
supports only 1 units
  qemu-system-x86_64: -device ide-hd,drive=bb: Device initialization failed.
  qemu-system-x86_64: -device ide-hd,drive=bb: Device 'ide-hd' could not be 
initialized
  
  If a bus isn't specified for -device ide-hd, it just uses the first bus
  it finds, not taking into account if that bus was already assigned for
  another device. So users are forced to do -device ide-hd,bus=ide.0
  -device ide-hd,bus=ide.1, etc.
  
  This isn't specific to -device ahci, but it's worse there since there
  isn't any -drive if=IDE or -hda convenience option, which both seem to
  get the logic correct.
  
  I know -device is the 'build it yourself' approach so I understand if
  this is WONTFIX.
+ 
+ This is affects qemu.git as of today (8-31-2013)

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https://bugs.launchpad.net/bugs/1219234

Title:
  -device ide-hd will assign bus with with no free units

Status in QEMU:
  New

Bug description:
  Originally filed here:
  https://bugzilla.redhat.com/show_bug.cgi?id=1000118

  ./x86_64-softmmu/qemu-system-x86_64 -device ahci -drive 
id=aa,file=/tmp/foo,if=none -drive id=bb,file=/tmp/foo,if=none -device 
ide-hd,drive=aa -device ide-hd,drive=bb
  qemu-system-x86_64: -device ide-hd,drive=bb: Can't create IDE unit 1, bus 
supports only 1 units
  qemu-system-x86_64: -device ide-hd,drive=bb: Device initialization failed.
  qemu-system-x86_64: -device ide-hd,drive=bb: Device 'ide-hd' could not be 
initialized

  If a bus isn't specified for -device ide-hd, it just uses the first
  bus it finds, not taking into account if that bus was already assigned
  for another device. So users are forced to do -device ide-hd,bus=ide.0
  -device ide-hd,bus=ide.1, etc.

  This isn't specific to -device ahci, but it's worse there since there
  isn't any -drive if=IDE or -hda convenience option, which both seem to
  get the logic correct.

  I know -device is the 'build it yourself' approach so I understand if
  this is WONTFIX.

  This is affects qemu.git as of today (8-31-2013)

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