diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2013-10-04 09:42:34 (GMT) |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2014-05-14 18:38:56 (GMT) |
| commit | c54506d66a38da3abc9177e29ee32f78b76108c2 (patch) | |
| tree | 2d7d60f0861cfc6c8289a4e917132ffdd21b6550 /drivers/net/wireless | |
| parent | 2ccfd0fb0813d9890e316a82cf66a0a789f70983 (diff) | |
| download | linux-fsl-qoriq-c54506d66a38da3abc9177e29ee32f78b76108c2.tar.xz | |
net: iwlwifi: request only a threaded handler for interrupts
On RT the trans_pcie->irq_lock lock is converted into a sleeping lock
and can't be used in primary irq handler. The lock is used in mutliple
places which means turning it into a raw lock could increase the
latency of the system.
For now both handlers are moved into the thread.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Clark Williams <clark.williams@gmail.com>
Diffstat (limited to 'drivers/net/wireless')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/pcie/trans.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/pcie/trans.c b/drivers/net/wireless/iwlwifi/pcie/trans.c index 7bdaf06..62aac3b 100644 --- a/drivers/net/wireless/iwlwifi/pcie/trans.c +++ b/drivers/net/wireless/iwlwifi/pcie/trans.c @@ -1394,6 +1394,20 @@ static const struct iwl_trans_ops trans_ops_pcie = { .set_bits_mask = iwl_trans_pcie_set_bits_mask, }; +#ifdef CONFIG_PREEMPT_RT_BASE +static irqreturn_t iwl_rt_irq_handler(int irq, void *dev_id) +{ + irqreturn_t ret; + + local_bh_disable(); + ret = iwl_pcie_isr_ict(irq, dev_id); + local_bh_enable(); + if (ret == IRQ_WAKE_THREAD) + ret = iwl_pcie_irq_handler(irq, dev_id); + return ret; +} +#endif + struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev, const struct pci_device_id *ent, const struct iwl_cfg *cfg) @@ -1512,9 +1526,14 @@ struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev, if (iwl_pcie_alloc_ict(trans)) goto out_free_cmd_pool; +#ifdef CONFIG_PREEMPT_RT_BASE + err = request_threaded_irq(pdev->irq, NULL, iwl_rt_irq_handler, + IRQF_SHARED | IRQF_ONESHOT, DRV_NAME, trans); +#else err = request_threaded_irq(pdev->irq, iwl_pcie_isr_ict, iwl_pcie_irq_handler, IRQF_SHARED, DRV_NAME, trans); +#endif if (err) { IWL_ERR(trans, "Error allocating IRQ %d\n", pdev->irq); goto out_free_ict; |