Messages in this thread | | | From | Jia-Ju Bai <> | Subject | [BUG] scsi: lpfc: possible ABBA deadlock | Date | Thu, 15 Jul 2021 18:37:55 +0800 |
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Hello,
I find there is a possible ABBA deadlock in the lpfc driver in Linux 5.10:
In lpfc_nvmet_unsol_fcp_issue_abort(): 3502: spin_lock_irqsave(&ctxp->ctxlock, flags); 3504: spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock);
In lpfc_sli4_nvmet_xri_aborted(): 1787: spin_lock(&phba->sli4_hba.abts_nvmet_buf_list_lock); 1794: spin_lock(&ctxp->ctxlock);
When lpfc_nvmet_unsol_fcp_issue_abort() and lpfc_sli4_nvmet_xri_aborted() are concurrently executed, the deadlock can occur.
I am not quite sure whether this possible deadlock is real and how to fix it if it is real. Any feedback would be appreciated, thanks :)
Best wishes, Jia-Ju Bai
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