I've been having problems getting PCMCIA IDE to work on my Vaio laptop on recent kernels (I've been working most with 2.6.23.1 and .8). I've been hesitant to report it as a kernel bug because it may very well be a problem with my .config parameters -- the CDROM worked in distro kernels back around 2.6.17 and .18, and self-built kernels even earlier than that, but the configuration has changed quite a bit since then so it's hard to compare directly and figure out if I'm missing something. First, is this a reasonable place to report problems with PCMCIA, or does it belong on a PCMCIA list? The machine is a Vaio SR17 and I'm hotplugging a PCMCIA CDROM drive (this is a subnotebook, so the drive is external). I don't think it's CD specific (the CONFIG_BLK_DEV_IDECD code), because /proc/ide only shows ide0, not ide2 like I'm used to seeing in earlier kernels when the CD drive was connected. PCMCIA/Cardbus itself works fine (e.g. for network cards). There's no sata (this is an old machine). Depending on how I set kernel options, I can get the kernel to lock up when the PCMCIA CDROM drive is plugged in, or not. When it locks, it stays locked up (no keyboard or X events), until I eject the PCMCIA plug, then after a few seconds things are back to normal. Either way, it never notices the CD drive or creates an ide2 bus. In the cases where it locks up, dmesg says: BUG: soft lockup detected on CPU#0! [<c01213b7>] update_process_times+0x27/0x70 [<c0130e7d>] tick_nohz_handler+0x5d/0xf0 [<c01069ab>] timer_interrupt+0xb/0x20 [<c013c795>] handle_IRQ_event+0x25/0x60 [<c013dd14>] handle_level_irq+0x44/0xa0 [<c0105d72>] do_IRQ+0x42/0x80 [<c01041af>] common_interrupt+0x23/0x28 [<c011dbcd>] __do_softirq+0x2d/0x90 [<c011dc56>] do_softirq+0x26/0x30 [<c011df1a>] irq_exit+0x5a/0x60 [<c0105d77>] do_IRQ+0x47/0x80 [<c01041af>] common_interrupt+0x23/0x28 [<c02eb163>] ide_register_hw_with_fixup+0x33/0x1e0 [<c02fc3d6>] idecs_register+0x76/0x80 [ various more backtrace, then ] ======================= Probing IDE interface ide2... then that last message keeps repeating until I eject. Since it's obviously complaining about IRQs, I tried turning on CONFIG_IDEPCI_SHARE_IRQ=y (I also turned off CONFIG_BLK_DEV_IDEACPI to see if that made any difference) and that stopped the "BUG: soft lockup", but I still got the loop over "Probing IDE interface ide2..." and it still doesn't see the CDROM or ide2. I've put the full .config files at http://shallowsky.com/tmp/configs/ so as not to clutter this list. Can anybody offer any tips for figuring out whether this is a config error on my part, or a real kernel bug in IDECS? Or send me to a more appropriate forum, if this isn't it? Thanks in advance! ...Akkana - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
