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If the SCSI host enters EH, any pending IO will be processed by SCSI EH. However it is possible that SCSI EH will try to abort the IO and also at the same time the IO completes in the driver. In this situation there is a small chance of freeing the sas_task twice. Then if another IO re-uses freed sas_task before the second time of free'ing sas_task, it is possible to free incorrect sas_task. To avoid this situation, add some checks to increase reliability. The sas_task task state flag SAS_TASK_STATE_ABORTED is used to mutually protect the LLDD and libsas freeing the task. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> |
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| .. | ||
| hisi_sas_main.c | ||
| hisi_sas_v1_hw.c | ||
| hisi_sas_v2_hw.c | ||
| hisi_sas_v3_hw.c | ||
| hisi_sas.h | ||
| Kconfig | ||
| Makefile | ||