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| author |   James Smart <jsmart2021@gmail.com> | 2022-04-12 15:19:57 -0700 |
|---|---|---|
| committer |   Martin K. Petersen <martin.petersen@oracle.com> | 2022-04-18 22:48:46 -0400 |
| commit | d6d45f67a11136cb88a70a29ab22ea6db8ae6bd5 (patch) | |
| tree | 1665dfcf81babcaff4ab986f83f3d5d119a7a3f1 /drivers/scsi/lpfc | |
| parent | scsi: lpfc: Correct CRC32 calculation for congestion stats (diff) | |
| download | linux-dev-d6d45f67a11136cb88a70a29ab22ea6db8ae6bd5.tar.xz linux-dev-d6d45f67a11136cb88a70a29ab22ea6db8ae6bd5.zip | |
scsi: lpfc: Fix call trace observed during I/O with CMF enabled
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@gmail.com
Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/lpfc')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_scsi.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c index c3daf7a3e123..a949fe53651a 100644 --- a/drivers/scsi/lpfc/lpfc_scsi.c +++ b/drivers/scsi/lpfc/lpfc_scsi.c @@ -3835,7 +3835,7 @@ 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); @@ -3879,7 +3879,7 @@ 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; } |