From mboxrd@z Thu Jan 1 00:00:00 1970 From: afzal mohammed Date: Wed, 04 Mar 2020 00:51:28 +0000 Subject: [PATCH v3] sh: replace setup_irq() by request_irq() Message-Id: <20200304005120.5403-1-afzal.mohd.ma@gmail.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-sh@vger.kernel.org, linux-kernel@vger.kernel.org Cc: afzal mohammed , Yoshinori Sato , Rich Felker request_irq() is preferred over setup_irq(). Invocations of setup_irq() occur after memory allocators are ready. Per tglx[1], setup_irq() existed in olden days when allocators were not ready by the time early interrupts were initialized. Hence replace setup_irq() by request_irq(). [1] https://lkml.kernel.org/r/alpine.DEB.2.20.1710191609480.1971@nanos Signed-off-by: afzal mohammed --- Hi sh maintainers, if okay w/ this change, please consider taking it thr' your tree, else please let me know. Regards afzal Link to v2 & v1, [v2] https://lkml.kernel.org/r/cover.1582471508.git.afzal.mohd.ma@gmail.com [v1] https://lkml.kernel.org/r/cover.1581478323.git.afzal.mohd.ma@gmail.com v3: * Split out from tree wide series, as Thomas suggested to get it thr' respective maintainers * Modify pr_err displayed in case of error * Re-arrange code & choose pr_err args as required to improve readability * Remove irrelevant parts from commit message & improve v2: * Replace pr_err("request_irq() on %s failed" by pr_err("%s: request_irq() failed" * Commit message massage arch/sh/boards/mach-cayman/irq.c | 18 ++++++------------ arch/sh/drivers/dma/dma-pvr2.c | 9 +++------ 2 files changed, 9 insertions(+), 18 deletions(-) diff --git a/arch/sh/boards/mach-cayman/irq.c b/arch/sh/boards/mach-cayman/irq.c index 3b6ea2d99013..0305d0b51730 100644 --- a/arch/sh/boards/mach-cayman/irq.c +++ b/arch/sh/boards/mach-cayman/irq.c @@ -40,16 +40,6 @@ static irqreturn_t cayman_interrupt_pci2(int irq, void *dev_id) return IRQ_NONE; } -static struct irqaction cayman_action_smsc = { - .name = "Cayman SMSC Mux", - .handler = cayman_interrupt_smsc, -}; - -static struct irqaction cayman_action_pci2 = { - .name = "Cayman PCI2 Mux", - .handler = cayman_interrupt_pci2, -}; - static void enable_cayman_irq(struct irq_data *data) { unsigned int irq = data->irq; @@ -149,6 +139,10 @@ void init_cayman_irq(void) } /* Setup the SMSC interrupt */ - setup_irq(SMSC_IRQ, &cayman_action_smsc); - setup_irq(PCI2_IRQ, &cayman_action_pci2); + if (request_irq(SMSC_IRQ, cayman_interrupt_smsc, 0, "Cayman SMSC Mux", + NULL)) + pr_err("Failed to register Cayman SMSC Mux interrupt\n"); + if (request_irq(PCI2_IRQ, cayman_interrupt_pci2, 0, "Cayman PCI2 Mux", + NULL)) + pr_err("Failed to register Cayman PCI2 Mux interrupt\n"); } diff --git a/arch/sh/drivers/dma/dma-pvr2.c b/arch/sh/drivers/dma/dma-pvr2.c index b5dbd1f75768..21c347543e19 100644 --- a/arch/sh/drivers/dma/dma-pvr2.c +++ b/arch/sh/drivers/dma/dma-pvr2.c @@ -64,11 +64,6 @@ static int pvr2_xfer_dma(struct dma_channel *chan) return 0; } -static struct irqaction pvr2_dma_irq = { - .name = "pvr2 DMA handler", - .handler = pvr2_dma_interrupt, -}; - static struct dma_ops pvr2_dma_ops = { .request = pvr2_request_dma, .get_residue = pvr2_get_dma_residue, @@ -84,7 +79,9 @@ static struct dma_info pvr2_dma_info = { static int __init pvr2_dma_init(void) { - setup_irq(HW_EVENT_PVR2_DMA, &pvr2_dma_irq); + if (request_irq(HW_EVENT_PVR2_DMA, pvr2_dma_interrupt, 0, + "pvr2 DMA handler", NULL)) + pr_err("Failed to register pvr2 DMA handler interrupt\n"); request_dma(PVR2_CASCADE_CHAN, "pvr2 cascade"); return register_dmac(&pvr2_dma_info); -- 2.25.1