From: John Garry john.garry@huawei.com
mainline inclusion from mainline-v5.19-rc1 commit 71453bd9d1bf category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I5WRGD CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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We have seen errors like this when a SATA device is probed:
[524.566298] hisi_sas_v3_hw 0000L74:02.0: erroneous completion iptt=4096 ... [524.582827] sas: TMF task open reject failed 500e004aaaaaaaa00
Since commit 21c7e972475e ("scsi: hisi_sas: Disable SATA disk phy for severe I_T nexus reset failure"), we issue an ATA softreset to disks after a phy reset to ensure that they are in sound working order. If the softreset is issued before the remote phy has come back up then the softreset will fail (errors as above). Remedy this by waiting for the phy to come back up after the reset.
Link: https://lore.kernel.org/r/1652354134-171343-3-git-send-email-john.garry@huaw... Tested-by: Yihang Li liyihang6@hisilicon.com Reviewed-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 Signed-off-by: xiabing xiabing12@h-partners.com Reviewed-by: Jason Yan yanaijie@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/scsi/hisi_sas/hisi_sas_main.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-)
diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c index d1766011cb22..d3f66cab4359 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_main.c +++ b/drivers/scsi/hisi_sas/hisi_sas_main.c @@ -1875,13 +1875,18 @@ static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device) /* report PHY down if timed out */ if (rc == -ETIMEDOUT) hisi_sas_phy_down(hisi_hba, sas_phy->id, 0, GFP_KERNEL); - } else if (sas_dev->dev_status != HISI_SAS_DEV_INIT) { - /* - * If in init state, we rely on caller to wait for link to be - * ready; otherwise, except phy reset is fail, delay. - */ - if (!rc) - msleep(2000); + return rc; + } + + if (rc) + return rc; + + /* Remote phy */ + if (dev_is_sata(device)) { + rc = sas_ata_wait_after_reset(device, + HISI_SAS_WAIT_PHYUP_TIMEOUT); + } else { + msleep(2000); }
return rc;