From 7ea3e7763c50b20a8bd25cf524ea0c6463de69be Mon Sep 17 00:00:00 2001 From: Yihang Li Date: Thu, 14 Dec 2023 11:45:15 +0800 Subject: scsi: hisi_sas: Rollback some operations if FLR failed We obtain the semaphore and set HISI_SAS_RESETTING_BIT in hisi_sas_reset_prepare_v3_hw(), block the scsi host and set HISI_SAS_REJECT_CMD_BIT in hisi_sas_controller_reset_prepare(), released them in hisi_sas_controller_reset_done(). However, if the HW reset failure in FLR results in early return, the semaphore and flag bits will not be release. Rollback some operations including clearing flags / releasing semaphore when FLR is failed. Fixes: e5ea48014adc ("scsi: hisi_sas: Implement handlers of PCIe FLR for v3 hw") Signed-off-by: Yihang Li Signed-off-by: Xiang Chen Link: https://lore.kernel.org/r/1702525516-51258-5-git-send-email-chenxiang66@hisilicon.com Signed-off-by: Martin K. Petersen --- drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/scsi') diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c index af2cc083a099..847306018e4f 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c +++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c @@ -4968,6 +4968,7 @@ static void hisi_sas_reset_done_v3_hw(struct pci_dev *pdev) { struct sas_ha_struct *sha = pci_get_drvdata(pdev); struct hisi_hba *hisi_hba = sha->lldd_ha; + struct Scsi_Host *shost = hisi_hba->shost; struct device *dev = hisi_hba->dev; int rc; @@ -4976,6 +4977,10 @@ static void hisi_sas_reset_done_v3_hw(struct pci_dev *pdev) rc = hw_init_v3_hw(hisi_hba); if (rc) { dev_err(dev, "FLR: hw init failed rc=%d\n", rc); + clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags); + scsi_unblock_requests(shost); + clear_bit(HISI_SAS_RESETTING_BIT, &hisi_hba->flags); + up(&hisi_hba->sem); return; } -- cgit