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| author | Albert Lee <albertcc@tw.ibm.com> | 2005-08-16 14:25:38 +0800 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-08-23 01:03:38 -0400 |
| commit | 3f3791d30036a367f05b9d0be28ce7ff2e017a5a (patch) | |
| tree | 06bd36db635380e3ba5371b15c899b3b03c095a4 /drivers/scsi | |
| parent | 443d089703ffa585aea1af47c68f1be5d0ec3115 (diff) | |
| download | linux-3f3791d30036a367f05b9d0be28ce7ff2e017a5a.tar.gz linux-3f3791d30036a367f05b9d0be28ce7ff2e017a5a.tar.bz2 linux-3f3791d30036a367f05b9d0be28ce7ff2e017a5a.zip | |
[PATCH] libata: Clear ATA_QCFLAG_ACTIVE flag before calling the completion callback
Description:
After calling the completion callback, the libata error handler might be
running and getting atapi sense data. Clearing the ATA_QCFLAG_ACTIVE flag
at this point might interfere with the libata error handler.
Changes:
- Clear the ATA_QCFLAG_ACTIVE flag before calling the completion callback
(and also before the error handler)
- Add some comment
Signed-off-by: Albert Lee <albertcc@tw.ibm.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/libata-core.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index 3544f5d020c6..9a6aacf467b8 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -3213,9 +3213,14 @@ void ata_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) ata_sg_clean(qc); + /* atapi: mark qc as inactive to prevent the interrupt handler + * from completing the command twice later, before the error handler + * is called. (when rc != 0 and atapi request sense is needed) + */ + qc->flags &= ~ATA_QCFLAG_ACTIVE; + /* call completion callback */ rc = qc->complete_fn(qc, drv_stat); - qc->flags &= ~ATA_QCFLAG_ACTIVE; /* if callback indicates not to complete command (non-zero), * return immediately |