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libata: cleanup SAT error translation

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- Remove duplicate Medium Error Entry.

- Fix translations to match SAT2 translation table.

- Remove warning messages when translation is not found when decoding
  error or status register.

- Goes through status register decoding when only ABRT bit is set in
  error register.

Tested: When a disk fails, it sets

  Status = 0x71 [DRDY DF ERR] , Error = 0x4 [ABRT]

This patch will make the sense key HARDWARE_ERROR instead.

When there is a simple command syntax error:

  Status = 0x51 [DRDY ERR] , Error = 0x4 [ABRT]

The sense key remains ABORTED_COMMAND.

tj: Some updates to the description and comments.

Signed-off-by: Gwendal Grignou <gwendal@google.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Gwendal Grignou 2013-06-18 10:54:48 -07:00 committed by Tejun Heo
parent 1e8f5f761c
commit 78062c50d1
1 changed files with 17 additions and 20 deletions
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37
drivers/ata/libata-scsi.c
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@ -849,25 +849,24 @@ static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
/* Bad address mark */ /* Bad address mark */
{0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
/* TRK0 */ /* TRK0 */
{0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
/* Abort & !ICRC */ /* Abort: 0x04 is not translated here, see below */
{0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
/* Media change request */ /* Media change request */
{0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
/* SRV */ /* SRV/IDNF */
{0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, // ID not found Logical address out of range
/* Media change */ /* MC */
{0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline {0x20, UNIT_ATTENTION, 0x28, 0x00}, // Media Changed Not ready to ready change, medium may have changed
/* ECC */ /* ECC */
{0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
/* BBD - block marked bad */ /* BBD - block marked bad */
{0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
{0xFF, 0xFF, 0xFF, 0xFF}, // END mark {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
}; };
static const unsigned char stat_table[][4] = { static const unsigned char stat_table[][4] = {
/* Must be first because BUSY means no other bits valid */ /* Must be first because BUSY means no other bits valid */
{0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
{0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault {0x20, HARDWARE_ERROR, 0x44, 0x00}, // Device fault, internal target failure
{0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
{0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
{0xFF, 0xFF, 0xFF, 0xFF}, // END mark {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
@ -892,13 +891,13 @@ static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
goto translate_done; goto translate_done;
} }
} }
/* No immediate match */
if (verbose)
printk(KERN_WARNING "ata%u: no sense translation for "
"error 0x%02x\n", id, drv_err);
} }
/* Fall back to interpreting status bits */ /*
* Fall back to interpreting status bits. Note that if the drv_err
* has only the ABRT bit set, we decode drv_stat. ABRT by itself
* is not descriptive enough.
*/
for (i = 0; stat_table[i][0] != 0xFF; i++) { for (i = 0; stat_table[i][0] != 0xFF; i++) {
if (stat_table[i][0] & drv_stat) { if (stat_table[i][0] & drv_stat) {
*sk = stat_table[i][1]; *sk = stat_table[i][1];
@ -907,13 +906,11 @@ static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
goto translate_done; goto translate_done;
} }
} }
/* No error? Undecoded? */
if (verbose)
printk(KERN_WARNING "ata%u: no sense translation for "
"status: 0x%02x\n", id, drv_stat);
/* We need a sensible error return here, which is tricky, and one /*
that won't cause people to do things like return a disk wrongly */ * We need a sensible error return here, which is tricky, and one
* that won't cause people to do things like return a disk wrongly.
*/
*sk = ABORTED_COMMAND; *sk = ABORTED_COMMAND;
*asc = 0x00; *asc = 0x00;
*ascq = 0x00; *ascq = 0x00;