From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mga09.intel.com ([134.134.136.24]:20040 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751423Ab3LKIfF (ORCPT ); Wed, 11 Dec 2013 03:35:05 -0500 From: Emmanuel Grumbach To: linux-rt-users@vger.kernel.org Cc: linux-wireless@vger.kernel.org, Emmanuel Grumbach Subject: [RFC 07/10] iwlwifi: pcie: return inta from iwl_pcie_int_cause_{non_}ict Date: Wed, 11 Dec 2013 10:33:42 +0200 Message-Id: <1386750826-25219-8-git-send-email-emmanuel.grumbach@intel.com> (sfid-20131211_093512_947770_24BECD52) In-Reply-To: <1386750826-25219-1-git-send-email-emmanuel.grumbach@intel.com> References: <1386750826-25219-1-git-send-email-emmanuel.grumbach@intel.com> Sender: linux-wireless-owner@vger.kernel.org List-ID: These functions are meant to return an interrupt cause and not an irqreturn_t. The only drawback is that we will return IRQ_NONE instead of IRQ_HANDLED when error occurs - but that shouldn't be an issue. Change-Id: I2de5c0d39fafb2a00429c314a2a5f0336347233d Signed-off-by: Emmanuel Grumbach --- drivers/net/wireless/iwlwifi/pcie/rx.c | 31 ++++++++++++------------------- 1 file changed, 12 insertions(+), 19 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/pcie/rx.c b/drivers/net/wireless/iwlwifi/pcie/rx.c index 58d3f64..3ddf012 100644 --- a/drivers/net/wireless/iwlwifi/pcie/rx.c +++ b/drivers/net/wireless/iwlwifi/pcie/rx.c @@ -807,7 +807,7 @@ static void iwl_pcie_irq_handle_error(struct iwl_trans *trans) wake_up(&trans_pcie->wait_command_queue); } -static irqreturn_t iwl_pcie_int_cause_non_ict(struct iwl_trans *trans) +static u32 iwl_pcie_int_cause_non_ict(struct iwl_trans *trans) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); u32 inta; @@ -841,14 +841,14 @@ static irqreturn_t iwl_pcie_int_cause_non_ict(struct iwl_trans *trans) if (test_bit(STATUS_INT_ENABLED, &trans->status) && !trans_pcie->inta) iwl_enable_interrupts(trans); - return IRQ_NONE; + return trans_pcie->inta; } if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) { /* Hardware disappeared. It might have already raised * an interrupt */ IWL_WARN(trans, "HARDWARE GONE?? INTA == 0x%08x\n", inta); - return IRQ_HANDLED; + return trans_pcie->inta; } if (iwl_have_debug_level(IWL_DL_ISR)) @@ -859,7 +859,7 @@ static irqreturn_t iwl_pcie_int_cause_non_ict(struct iwl_trans *trans) trans_pcie->inta |= inta; /* the thread will service interrupts and re-enable them */ - return IRQ_WAKE_THREAD; + return trans_pcie->inta; } /* a device (PCI-E) page is 4096 bytes long */ @@ -875,10 +875,9 @@ static irqreturn_t iwl_pcie_int_cause_non_ict(struct iwl_trans *trans) * the interrupt we need to service, driver will set the entries back to 0 and * set index. */ -static irqreturn_t iwl_pcie_int_cause_ict(struct iwl_trans *trans) +static u32 iwl_pcie_int_cause_ict(struct iwl_trans *trans) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - irqreturn_t ret; u32 inta; u32 val = 0; u32 read; @@ -938,9 +937,7 @@ static irqreturn_t iwl_pcie_int_cause_ict(struct iwl_trans *trans) /* iwl_pcie_tasklet() will service interrupts and re-enable them */ if (likely(inta)) - return IRQ_WAKE_THREAD; - - ret = IRQ_HANDLED; + return trans_pcie->inta; none: /* re-enable interrupts here since we don't have anything to service. @@ -950,7 +947,7 @@ static irqreturn_t iwl_pcie_int_cause_ict(struct iwl_trans *trans) !trans_pcie->inta) iwl_enable_interrupts(trans); - return ret; + return trans_pcie->inta; } irqreturn_t iwl_pcie_irq_handler(int irq, void *dev_id) @@ -961,7 +958,6 @@ irqreturn_t iwl_pcie_irq_handler(int irq, void *dev_id) u32 inta = 0; u32 handled = 0; unsigned long flags; - irqreturn_t ret; u32 i; lock_map_acquire(&trans->sync_cmd_lockdep_map); @@ -972,13 +968,13 @@ irqreturn_t iwl_pcie_irq_handler(int irq, void *dev_id) * use legacy interrupt. */ if (likely(trans_pcie->use_ict)) - ret = iwl_pcie_int_cause_ict(trans); + inta = iwl_pcie_int_cause_ict(trans); else - ret = iwl_pcie_int_cause_non_ict(trans); + inta = iwl_pcie_int_cause_non_ict(trans); - if (ret != IRQ_WAKE_THREAD) { + if (!inta) { spin_unlock_irqrestore(&trans_pcie->irq_lock, flags); - return ret; + return IRQ_NONE; } /* Ack/clear/reset pending uCode interrupts. @@ -992,10 +988,7 @@ irqreturn_t iwl_pcie_irq_handler(int irq, void *dev_id) * hardware bugs here by ACKing all the possible interrupts so that * interrupt coalescing can still be achieved. */ - iwl_write32(trans, CSR_INT, - trans_pcie->inta | ~trans_pcie->inta_mask); - - inta = trans_pcie->inta; + iwl_write32(trans, CSR_INT, inta | ~trans_pcie->inta_mask); if (iwl_have_debug_level(IWL_DL_ISR)) IWL_DEBUG_ISR(trans, "inta 0x%08x, enabled 0x%08x\n", -- 1.8.3.2 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Emmanuel Grumbach Subject: [RFC 07/10] iwlwifi: pcie: return inta from iwl_pcie_int_cause_{non_}ict Date: Wed, 11 Dec 2013 10:33:42 +0200 Message-ID: <1386750826-25219-8-git-send-email-emmanuel.grumbach@intel.com> References: <1386750826-25219-1-git-send-email-emmanuel.grumbach@intel.com> Cc: linux-wireless@vger.kernel.org, Emmanuel Grumbach To: linux-rt-users@vger.kernel.org Return-path: Received: from mga09.intel.com ([134.134.136.24]:20040 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751423Ab3LKIfF (ORCPT ); Wed, 11 Dec 2013 03:35:05 -0500 In-Reply-To: <1386750826-25219-1-git-send-email-emmanuel.grumbach@intel.com> Sender: linux-rt-users-owner@vger.kernel.org List-ID: These functions are meant to return an interrupt cause and not an irqreturn_t. The only drawback is that we will return IRQ_NONE instead of IRQ_HANDLED when error occurs - but that shouldn't be an issue. Change-Id: I2de5c0d39fafb2a00429c314a2a5f0336347233d Signed-off-by: Emmanuel Grumbach --- drivers/net/wireless/iwlwifi/pcie/rx.c | 31 ++++++++++++------------------- 1 file changed, 12 insertions(+), 19 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/pcie/rx.c b/drivers/net/wireless/iwlwifi/pcie/rx.c index 58d3f64..3ddf012 100644 --- a/drivers/net/wireless/iwlwifi/pcie/rx.c +++ b/drivers/net/wireless/iwlwifi/pcie/rx.c @@ -807,7 +807,7 @@ static void iwl_pcie_irq_handle_error(struct iwl_trans *trans) wake_up(&trans_pcie->wait_command_queue); } -static irqreturn_t iwl_pcie_int_cause_non_ict(struct iwl_trans *trans) +static u32 iwl_pcie_int_cause_non_ict(struct iwl_trans *trans) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); u32 inta; @@ -841,14 +841,14 @@ static irqreturn_t iwl_pcie_int_cause_non_ict(struct iwl_trans *trans) if (test_bit(STATUS_INT_ENABLED, &trans->status) && !trans_pcie->inta) iwl_enable_interrupts(trans); - return IRQ_NONE; + return trans_pcie->inta; } if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) { /* Hardware disappeared. It might have already raised * an interrupt */ IWL_WARN(trans, "HARDWARE GONE?? INTA == 0x%08x\n", inta); - return IRQ_HANDLED; + return trans_pcie->inta; } if (iwl_have_debug_level(IWL_DL_ISR)) @@ -859,7 +859,7 @@ static irqreturn_t iwl_pcie_int_cause_non_ict(struct iwl_trans *trans) trans_pcie->inta |= inta; /* the thread will service interrupts and re-enable them */ - return IRQ_WAKE_THREAD; + return trans_pcie->inta; } /* a device (PCI-E) page is 4096 bytes long */ @@ -875,10 +875,9 @@ static irqreturn_t iwl_pcie_int_cause_non_ict(struct iwl_trans *trans) * the interrupt we need to service, driver will set the entries back to 0 and * set index. */ -static irqreturn_t iwl_pcie_int_cause_ict(struct iwl_trans *trans) +static u32 iwl_pcie_int_cause_ict(struct iwl_trans *trans) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - irqreturn_t ret; u32 inta; u32 val = 0; u32 read; @@ -938,9 +937,7 @@ static irqreturn_t iwl_pcie_int_cause_ict(struct iwl_trans *trans) /* iwl_pcie_tasklet() will service interrupts and re-enable them */ if (likely(inta)) - return IRQ_WAKE_THREAD; - - ret = IRQ_HANDLED; + return trans_pcie->inta; none: /* re-enable interrupts here since we don't have anything to service. @@ -950,7 +947,7 @@ static irqreturn_t iwl_pcie_int_cause_ict(struct iwl_trans *trans) !trans_pcie->inta) iwl_enable_interrupts(trans); - return ret; + return trans_pcie->inta; } irqreturn_t iwl_pcie_irq_handler(int irq, void *dev_id) @@ -961,7 +958,6 @@ irqreturn_t iwl_pcie_irq_handler(int irq, void *dev_id) u32 inta = 0; u32 handled = 0; unsigned long flags; - irqreturn_t ret; u32 i; lock_map_acquire(&trans->sync_cmd_lockdep_map); @@ -972,13 +968,13 @@ irqreturn_t iwl_pcie_irq_handler(int irq, void *dev_id) * use legacy interrupt. */ if (likely(trans_pcie->use_ict)) - ret = iwl_pcie_int_cause_ict(trans); + inta = iwl_pcie_int_cause_ict(trans); else - ret = iwl_pcie_int_cause_non_ict(trans); + inta = iwl_pcie_int_cause_non_ict(trans); - if (ret != IRQ_WAKE_THREAD) { + if (!inta) { spin_unlock_irqrestore(&trans_pcie->irq_lock, flags); - return ret; + return IRQ_NONE; } /* Ack/clear/reset pending uCode interrupts. @@ -992,10 +988,7 @@ irqreturn_t iwl_pcie_irq_handler(int irq, void *dev_id) * hardware bugs here by ACKing all the possible interrupts so that * interrupt coalescing can still be achieved. */ - iwl_write32(trans, CSR_INT, - trans_pcie->inta | ~trans_pcie->inta_mask);