AuxXxilium/linux_dsm_epyc7002
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scsi: hisi_sas: fix a bug in hisi_sas_dev_gone()

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When device gone, NULL pointer can be accessed in free_device callback
if during SAS controller reset as we clear structure sas_dev prior.

Actually we can only set dev_type as SAS_PHY_UNUSED and not clear
structure sas_dev as all the members of structure sas_dev will be
re-initialized after device found.

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>
This commit is contained in:
Xiang Chen 2018-01-18 00:46:54 +08:00 committed by Martin K. Petersen
parent 6379c56070
commit 0d762b3af2
1 changed files with 0 additions and 1 deletions
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drivers/scsi/hisi_sas/hisi_sas_main.c
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@ -796,7 +796,6 @@ static void hisi_sas_dev_gone(struct domain_device *device)
hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
device->lldd_dev = NULL;
memset(sas_dev, 0, sizeof(*sas_dev));
}
if (hisi_hba->hw->free_device)