Am 23.08.2010 11:16, schrieb Tejun Heo: > On 08/23/2010 02:52 AM, Stefan /*St0fF*/ Hübner wrote: >> Hi Jeff and list, >> >> maybe this mail was wrong on the linux-scsi list. So here we go again: >> >> -------- Original-Nachricht -------- >> Betreff: Maybe a bug in libata-core >> Datum: Fri, 20 Aug 2010 23:48:09 +0200 >> Von: Stefan Hübner <stefan.huebner@xxxxxxxxxxxxxxxxxx> >> Antwort an: stefan.huebner@xxxxxxxxxxxxxxxxxx >> Organisation: TU-Ilmenau >> An: linux-scsi@xxxxxxxxxxxxxxx >> >> Hi List! >> >> After sending a WRITE_DMA_FUA_EXT ATA-command via SG_IO Passthru to a >> harddisk (here: /dev/sdd), my kernel panics. The is what I find in syslog: > > You're sending down data command w/o data. Panicking probably isn't > the best response here. Maybe the BUG_ON() should be changed to > WARN_ON_ONCE() + goto sg_err. > > Thanks. > As far as I know my code I thought I did send enough data. Maybe I'm misunderstanding something: I valloc'ated block_count*logical_block_size bytes, filled them with data and presented this buffer to the sg_io_hdr_t structure by setting dxfer_len to the length of the buffer, setting dxferp to a pointer to the buffer and setting the dxfer_direction to SG_DXFER_TO_DEV. The only thing coming to my mind would be overflow of dxfer_len, but as this is a unsigned int - wouldn't it be 32 bits wide? (and by that accepting f.e. 64k*512 bytes = 33 554 432 bytes (32M, needing 25 bits)) Any other suggestions, or do I have to present the code? Thanks, Stefan -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
