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    SubjectRe: [PATCH] block: fix residual byte count handling
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    On Tue, 2008-03-04 at 10:35 +0100, Jens Axboe wrote:

    > Looks excellent to me, has a variant of this been tested as OK by the
    > users reporting the regression?

    K3b burning seems to be a nogo here. This is git pulled this morning
    though, so it's a somewhat different tree than previously tested fwtw.

    [ 136.440021] ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
    [ 136.440043] ata1.01: cmd a0/00:00:00:00:00/00:00:00:00:00/b0 tag 0
    [ 136.440045] cdb 51 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00
    [ 136.440047] res 58/00:02:00:02:00/00:00:00:00:00/b0 Emask 0x2 (HSM violation)
    [ 136.440053] ata1.01: status: { DRDY DRQ }
    [ 136.440086] ata1: soft resetting link
    [ 165.327627] ata1.01: qc timeout (cmd 0xa1)
    [ 165.327627] ata1.01: failed to IDENTIFY (I/O error, err_mask=0x4)
    [ 165.327627] ata1.01: revalidation failed (errno=-5)
    [ 165.327627] ata1: failed to recover some devices, retrying in 5 secs
    [ 177.272373] ata1: port is slow to respond, please be patient (Status 0x80)
    [ 180.388879] ata1: device not ready (errno=-16), forcing hardreset
    [ 180.388879] ata1: soft resetting link
    [ 210.832471] ata1.01: qc timeout (cmd 0xa1)
    [ 210.832471] ata1.01: failed to IDENTIFY (I/O error, err_mask=0x4)
    [ 210.832471] ata1.01: revalidation failed (errno=-5)
    [ 210.832471] ata1: failed to recover some devices, retrying in 5 secs
    [ 223.392899] ata1: port is slow to respond, please be patient (Status 0x80)
    [ 225.920376] ata1: device not ready (errno=-16), forcing hardreset
    [ 225.920376] ata1: soft resetting link
    [ 256.542565] ata1.01: qc timeout (cmd 0xa1)
    [ 256.542565] ata1.01: failed to IDENTIFY (I/O error, err_mask=0x4)
    [ 256.542565] ata1.01: revalidation failed (errno=-5)
    [ 256.542565] ata1.01: disabled
    [ 259.995199] ata1.00: failed to IDENTIFY (I/O error, err_mask=0x40)
    [ 259.995214] ata1.00: revalidation failed (errno=-5)
    [ 259.995219] ata1: failed to recover some devices, retrying in 5 secs
    [ 265.047502] ata1: soft resetting link
    [ 262.397570] ata1.00: limited to UDMA/33 due to 40-wire cable
    [ 262.420039] ata1.00: configured for UDMA/33
    [ 262.420039] sr 0:0:1:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK
    [ 262.420039] sr 0:0:1:0: [sr0] Sense Key : Aborted Command [current] [descriptor]
    [ 262.420039] Descriptor sense data with sense descriptors (in hex):
    [ 262.420039] 72 0b 47 00 00 00 00 0e 09 0c 00 00 00 02 00 00
    [ 262.420039] 00 02 00 00 b0 58
    [ 262.420039] sr 0:0:1:0: [sr0] Add. Sense: Scsi parity error
    [ 262.420039] ata1: EH complete
    [ 262.420257] sd 0:0:0:0: [sda] 312581808 512-byte hardware sectors (160042 MB)
    [ 262.420320] sd 0:0:0:0: [sda] Write Protect is off
    [ 262.420326] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
    [ 262.420390] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA





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