diff options
| author | Sreekanth Reddy <sreekanth.reddy@broadcom.com> | 2022-09-12 16:57:36 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-09-25 20:49:51 +0300 |
| commit | 7f9f953d537a7c8362ed6adafd25ef8deb548756 (patch) | |
| tree | cf20feb6e0e81338f952bd318756ce7d52e152e7 /drivers/scsi/mpi3mr | |
| parent | 47cd930ee6aed7d63312ef133d1d46c4be42d6a9 (diff) | |
| download | linux-7f9f953d537a7c8362ed6adafd25ef8deb548756.tar.xz | |
scsi: mpi3mr: Schedule IRQ kthreads only on non-RT kernels
In RT kernels, the IRQ handler's code is executed as a kernel
thread. Modify the driver to avoid explicitly scheduling the IRQ kernel
thread.
Link: https://lore.kernel.org/r/20220912135742.11764-4-sreekanth.reddy@broadcom.com
Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/mpi3mr')
| -rw-r--r-- | drivers/scsi/mpi3mr/mpi3mr_fw.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/scsi/mpi3mr/mpi3mr_fw.c b/drivers/scsi/mpi3mr/mpi3mr_fw.c index cc700e291c83..78792f27b73b 100644 --- a/drivers/scsi/mpi3mr/mpi3mr_fw.c +++ b/drivers/scsi/mpi3mr/mpi3mr_fw.c @@ -537,6 +537,7 @@ int mpi3mr_process_op_reply_q(struct mpi3mr_ioc *mrioc, if ((le16_to_cpu(reply_desc->reply_flags) & MPI3_REPLY_DESCRIPT_FLAGS_PHASE_MASK) != exp_phase) break; +#ifndef CONFIG_PREEMPT_RT /* * Exit completion loop to avoid CPU lockup * Ensure remaining completion happens from threaded ISR. @@ -545,7 +546,7 @@ int mpi3mr_process_op_reply_q(struct mpi3mr_ioc *mrioc, op_reply_q->enable_irq_poll = true; break; } - +#endif } while (1); writel(reply_ci, @@ -614,6 +615,8 @@ static irqreturn_t mpi3mr_isr_primary(int irq, void *privdata) return IRQ_NONE; } +#ifndef CONFIG_PREEMPT_RT + static irqreturn_t mpi3mr_isr(int irq, void *privdata) { struct mpi3mr_intr_info *intr_info = privdata; @@ -691,6 +694,8 @@ static irqreturn_t mpi3mr_isr_poll(int irq, void *privdata) return IRQ_HANDLED; } +#endif + /** * mpi3mr_request_irq - Request IRQ and register ISR * @mrioc: Adapter instance reference @@ -713,8 +718,13 @@ static inline int mpi3mr_request_irq(struct mpi3mr_ioc *mrioc, u16 index) snprintf(intr_info->name, MPI3MR_NAME_LENGTH, "%s%d-msix%d", mrioc->driver_name, mrioc->id, index); +#ifndef CONFIG_PREEMPT_RT retval = request_threaded_irq(pci_irq_vector(pdev, index), mpi3mr_isr, mpi3mr_isr_poll, IRQF_SHARED, intr_info->name, intr_info); +#else + retval = request_threaded_irq(pci_irq_vector(pdev, index), mpi3mr_isr_primary, + NULL, IRQF_SHARED, intr_info->name, intr_info); +#endif if (retval) { ioc_err(mrioc, "%s: Unable to allocate interrupt %d!\n", intr_info->name, pci_irq_vector(pdev, index)); @@ -2179,9 +2189,13 @@ int mpi3mr_op_request_post(struct mpi3mr_ioc *mrioc, pi = 0; op_req_q->pi = pi; +#ifndef CONFIG_PREEMPT_RT if (atomic_inc_return(&mrioc->op_reply_qinfo[reply_qidx].pend_ios) > MPI3MR_IRQ_POLL_TRIGGER_IOCOUNT) mrioc->op_reply_qinfo[reply_qidx].enable_irq_poll = true; +#else + atomic_inc_return(&mrioc->op_reply_qinfo[reply_qidx].pend_ios); +#endif writel(op_req_q->pi, &mrioc->sysif_regs->oper_queue_indexes[reply_qidx].producer_index); |