commit 7e92b4fc34 - x86, serial: convert legacy COM ports to platform devices - broke my serial console

[Sébastien Dugué <sebastien.dugue@bull.net>]

  Hi Bjorn,

 your commit 7e92b4fc345f5b6f57585fbe5ffdb0f24d7c9b26 broke the serial console
on my box. Adding 'legacy_serial.force=1' to my boot param as a workaround
solves the issue, but this may be hiding bugs in Linux PnP support or
in my firmware.

  The box is a dual HT Xeon running a vanilla 2.6.22 x86_64 kernel

  here is my .config:

CONFIG_PNP=y
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_PCI=y
CONFIG_SERIAL_8250_PNP=y
CONFIG_SERIAL_8250_NR_UARTS=4
CONFIG_SERIAL_8250_RUNTIME_UARTS=4
CONFIG_SERIAL_8250_EXTENDED=y
CONFIG_SERIAL_8250_SHARE_IRQ=y
CONFIG_SERIAL_8250_DETECT_IRQ=y

  lspci output attached.
 
  Any ideas to help me debug this?

  If you need more info (like DSDT dump), just ask.

  Thanks,

  Sébastien.


00:00.0 Host bridge: Intel Corporation E7520 Memory Controller Hub (rev 0c)
00:00.1 Class ff00: Intel Corporation E7525/E7520 Error Reporting Registers (rev 0c)
00:01.0 System peripheral: Intel Corporation E7520 DMA Controller (rev 0c)
00:02.0 PCI bridge: Intel Corporation E7525/E7520/E7320 PCI Express Port A (rev 0c)
00:04.0 PCI bridge: Intel Corporation E7525/E7520 PCI Express Port B (rev 0c)
00:05.0 PCI bridge: Intel Corporation E7520 PCI Express Port B1 (rev 0c)
00:06.0 PCI bridge: Intel Corporation E7520 PCI Express Port C (rev 0c)
00:07.0 PCI bridge: Intel Corporation E7520 PCI Express Port C1 (rev 0c)
00:1c.0 PCI bridge: Intel Corporation 6300ESB 64-bit PCI-X Bridge (rev 02)
00:1d.0 USB Controller: Intel Corporation 6300ESB USB Universal Host Controller (rev 02)
00:1d.1 USB Controller: Intel Corporation 6300ESB USB Universal Host Controller (rev 02)
00:1d.4 System peripheral: Intel Corporation 6300ESB Watchdog Timer (rev 02)
00:1d.5 PIC: Intel Corporation 6300ESB I/O Advanced Programmable Interrupt Controller (rev 02)
00:1d.7 USB Controller: Intel Corporation 6300ESB USB2 Enhanced Host Controller (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 0a)
00:1f.0 ISA bridge: Intel Corporation 6300ESB LPC Interface Controller (rev 02)
00:1f.1 IDE interface: Intel Corporation 6300ESB PATA Storage Controller (rev 02)
00:1f.3 SMBus: Intel Corporation 6300ESB SMBus Controller (rev 02)
01:00.0 PCI bridge: Intel Corporation 6700PXH PCI Express-to-PCI Bridge A (rev 09)
01:00.2 PCI bridge: Intel Corporation 6700PXH PCI Express-to-PCI Bridge B (rev 09)
02:01.0 Ethernet controller: Intel Corporation 82544EI Gigabit Ethernet Controller (Copper) (rev 02)
02:03.0 SCSI storage controller: Adaptec AIC-7902B U320 (rev 10)
02:03.1 SCSI storage controller: Adaptec AIC-7902B U320 (rev 10)
03:01.0 Ethernet controller: Intel Corporation 82544EI Gigabit Ethernet Controller (Copper) (rev 02)
08:01.0 VGA compatible controller: ATI Technologies Inc Radeon RV100 QY [Radeon 7000/VE]
08:02.0 Ethernet controller: Intel Corporation 82541GI Gigabit Ethernet Controller
08:03.0 Ethernet controller: Intel Corporation 82541GI Gigabit Ethernet Controller