Messages in this thread | | | Date | Tue, 31 Oct 2006 23:08:38 +0100 | From | (Joerg Schilling) | Subject | SCSI over USB showstopper bug? |
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Hi,
it looks as if SG_GET_RESERVED_SIZE & SG_SET_RESERVED_SIZE are not in interaction with the underlying SCSI transport.
Programs like readcd and cdda2wav that try to get very large SCSI transfer buffers get a confirmation for nearly any SCSI transfer size but later when readcd/cdda2wav try to transfer data with an actual SCSI command, they fail with ENOMEM.
Correct fix: let sg.c make a callback to the underlying SCSI transport and let it get a confirmation tfor the buffer size.
Quick and dirty fix: reduce the maximum allowed DMA size to the smallest max DMA size of all SCSI transports.
Jörg
-- EMail:joerg@schily.isdn.cs.tu-berlin.de (home) Jörg Schilling D-13353 Berlin js@cs.tu-berlin.de (uni) schilling@fokus.fraunhofer.de (work) Blog: http://schily.blogspot.com/ URL: http://cdrecord.berlios.de/old/private/ ftp://ftp.berlios.de/pub/schily - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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