Hi. The original ata_reset() lost ATA-master drive and remove main file system after suspend/resume. Of cource it occors panic! I think that the ata_reset() in ata-lowlevel.c is bogus and I can not understand the code. So I study ATA and rewrite ata_reset() completely.
New device detect algorism using ata command ATA_IDENTIFY_DEVICE and ATA_IDENTIFY_PACKET_DEVICE for judge ATA and ATAPI devices. This patch works fine with my TOSHIBA Libretto L5. But not yet test ATAPI devices and ATA-slave channel. Maybe there is need to adjust wait DELAY time. Please test and replace ata_reset(). I hope this solve ATAng troubles. -- Hiroyuki Aizu
ata-lowlevel.c.diff
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