Messages in this thread | | | From | Andrey Borzenkov <> | Subject | HDIO_SCAN_HWIF causes hwif to "forget" PCI parent | Date | Sat, 8 Apr 2006 00:30:06 +0400 |
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I have notebook with ALi IDE interface:
00:04.0 IDE interface: ALi Corporation M5229 IDE (rev c3)
One of scripts called on Mandriva during suspend/resume calls hdparm -U for hdc on suspend and hdparm -R on resume.
Now, hdparm -U (HDIO_UNREGISTER_HWIF) completely wipes out hwif reinitializing it. It means, that also hwif->pci_dev is nulled. On hdparm -R (HDIO_SCAN_HWIF) it basically calls hwif_register without initializing pci_dev which means hdc appears in sysfs in different place:
before
lrwxrwxrwx 1 root root 0 Apr 7 23:53 /sys/block/hdc/device - -> ../../devices/pci0000:00/0000:00:04.0/ide1/1.0/
after
lrwxrwxrwx 1 root root 0 Apr 7 23:53 /sys/block/hdc/device - -> ../../devices/ide1/1.0/
this slightly confuses udev that receives a new path and regenerates cdrom links (OK this is no more kernel problem but how I noticed it in the first place :) so what has been cdrom0 before suddenly becomes cdrom1.
Looking at ide.c, I do not see any obvious ways to fix it. I appreciate any hint how this can be fixed; alternatively if libpata does not have this issue I am ready to test it.
Thank you
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