/proc/ide/hdx/settings broken?

[Diego Calleja García]

Today I realized that doing something like:

estel:/proc/ide/hda# echo "wcache:1" > settings 
or echo "using_dma:1" > settings

results in:
proc_ide_write_settings(): parse error
proc_ide_write_settings(): parse error

Searching in the list it seems it has been broken at least since July.
(This is test5)

Is this a know bug? 

.config attached.


00:07.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT8233/A/C/VT8235 PIPC Bus Master IDE (rev 06)

Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
VP_IDE: IDE controller at PCI slot 0000:00:07.1
VP_IDE: chipset revision 6
VP_IDE: not 100% native mode: will probe irqs later
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
VP_IDE: VIA vt82c686b (rev 40) IDE UDMA100 controller on pci0000:00:07.1
    ide0: BM-DMA at 0xd000-0xd007, BIOS settings: hda:DMA, hdb:pio
    ide1: BM-DMA at 0xd008-0xd00f, BIOS settings: hdc:DMA, hdd:DMA
hda: Maxtor 6Y060L0, ATA DISK drive
Using anticipatory scheduling io scheduler
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
hdc: HL-DT-ST GCE-8520B, ATAPI CD/DVD-ROM drive
hdd: LG CD-ROM CRD-8522B, ATAPI CD/DVD-ROM drive
ide1 at 0x170-0x177,0x376 on irq 15
hda: max request size: 128KiB
hda: 120103200 sectors (61492 MB) w/2048KiB Cache, CHS=65535/16/63, UDMA(100)
 hda: hda1 < hda5 hda6 hda7 hda8 > hda2 hda3



diego@estel:~$ cat /proc/ide/via 
----------VIA BusMastering IDE Configuration----------------
Driver Version:                     3.37
South Bridge:                       VIA vt82c686b
Revision:                           ISA 0x40 IDE 0x6
Highest DMA rate:                   UDMA100
BM-DMA base:                        0xd000
PCI clock:                          33.3MHz
Master Read  Cycle IRDY:            0ws
Master Write Cycle IRDY:            0ws
BM IDE Status Register Read Retry:  yes
Max DRDY Pulse Width:               No limit
-----------------------Primary IDE-------Secondary IDE------
Read DMA FIFO flush:          yes                 yes
End Sector FIFO flush:         no                  no
Prefetch Buffer:               no                  no
Post Write Buffer:             no                  no
Enabled:                      yes                 yes
Simplex only:                  no                  no
Cable Type:                   80w                 40w
-------------------drive0----drive1----drive2----drive3-----

Transfer Mode:       UDMA       PIO      UDMA       DMA
Address Setup:       30ns     120ns      30ns      30ns
Cmd Active:          90ns      90ns      90ns      90ns
Cmd Recovery:        30ns      30ns      30ns      30ns
Data Active:         90ns     330ns      90ns      90ns
Data Recovery:       30ns     270ns      30ns      30ns
Cycle Time:          20ns     600ns      60ns     120ns
Transfer Rate:   99.9MB/s   3.3MB/s  33.3MB/s  16.6MB/s

Attachment: config.gz
Description: Binary data