From: James Smart <jsmart2021@xxxxxxxxx> [ Upstream commit d6d45f67a11136cb88a70a29ab22ea6db8ae6bd5 ] The following was seen with CMF enabled: BUG: using smp_processor_id() in preemptible code: systemd-udevd/31711 kernel: caller is lpfc_update_cmf_cmd+0x214/0x420 [lpfc] kernel: CPU: 12 PID: 31711 Comm: systemd-udevd kernel: Call Trace: kernel: <TASK> kernel: dump_stack_lvl+0x44/0x57 kernel: check_preemption_disabled+0xbf/0xe0 kernel: lpfc_update_cmf_cmd+0x214/0x420 [lpfc] kernel: lpfc_nvme_fcp_io_submit+0x23b4/0x4df0 [lpfc] this_cpu_ptr() calls smp_processor_id() in a preemptible context. Fix by using per_cpu_ptr() with raw_smp_processor_id() instead. Link: https://lore.kernel.org/r/20220412222008.126521-16-jsmart2021@xxxxxxxxx Co-developed-by: Justin Tee <justin.tee@xxxxxxxxxxxx> Signed-off-by: Justin Tee <justin.tee@xxxxxxxxxxxx> Signed-off-by: James Smart <jsmart2021@xxxxxxxxx> Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/scsi/lpfc/lpfc_scsi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c index 8c79264a935b..c6944b282e21 100644 --- a/drivers/scsi/lpfc/lpfc_scsi.c +++ b/drivers/scsi/lpfc/lpfc_scsi.c @@ -3917,7 +3917,7 @@ lpfc_update_cmf_cmpl(struct lpfc_hba *phba, else time = div_u64(time + 500, 1000); /* round it */ - cgs = this_cpu_ptr(phba->cmf_stat); + cgs = per_cpu_ptr(phba->cmf_stat, raw_smp_processor_id()); atomic64_add(size, &cgs->rcv_bytes); atomic64_add(time, &cgs->rx_latency); atomic_inc(&cgs->rx_io_cnt); @@ -3960,7 +3960,7 @@ lpfc_update_cmf_cmd(struct lpfc_hba *phba, uint32_t size) atomic_set(&phba->rx_max_read_cnt, size); } - cgs = this_cpu_ptr(phba->cmf_stat); + cgs = per_cpu_ptr(phba->cmf_stat, raw_smp_processor_id()); atomic64_add(size, &cgs->total_bytes); return 0; } -- 2.35.1
