From 759bc01586535700fbb1aaf40dd727146e2e8b57 Mon Sep 17 00:00:00 2001 From: Greg Kurz Date: Mon, 10 Dec 2018 16:18:13 +0100 Subject: [PATCH] ocxl: Clarify error path in setup_xsl_irq() Implementing rollback with goto and labels is a common practice that leads to prettier and more maintainable code. FWIW, this design pattern is already being used in alloc_link() a few lines below in this file. Do the same in setup_xsl_irq(). Signed-off-by: Greg Kurz Acked-by: Frederic Barrat Acked-by: Andrew Donnellan Signed-off-by: Michael Ellerman --- drivers/misc/ocxl/link.c | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-) diff --git a/drivers/misc/ocxl/link.c b/drivers/misc/ocxl/link.c index 646d16450066..d50b861d7e57 100644 --- a/drivers/misc/ocxl/link.c +++ b/drivers/misc/ocxl/link.c @@ -273,9 +273,9 @@ static int setup_xsl_irq(struct pci_dev *dev, struct link *link) spa->irq_name = kasprintf(GFP_KERNEL, "ocxl-xsl-%x-%x-%x", link->domain, link->bus, link->dev); if (!spa->irq_name) { - unmap_irq_registers(spa); dev_err(&dev->dev, "Can't allocate name for xsl interrupt\n"); - return -ENOMEM; + rc = -ENOMEM; + goto err_xsl; } /* * At some point, we'll need to look into allowing a higher @@ -283,11 +283,10 @@ static int setup_xsl_irq(struct pci_dev *dev, struct link *link) */ spa->virq = irq_create_mapping(NULL, hwirq); if (!spa->virq) { - kfree(spa->irq_name); - unmap_irq_registers(spa); dev_err(&dev->dev, "irq_create_mapping failed for translation interrupt\n"); - return -EINVAL; + rc = -EINVAL; + goto err_name; } dev_dbg(&dev->dev, "hwirq %d mapped to virq %d\n", hwirq, spa->virq); @@ -295,15 +294,21 @@ static int setup_xsl_irq(struct pci_dev *dev, struct link *link) rc = request_irq(spa->virq, xsl_fault_handler, 0, spa->irq_name, link); if (rc) { - irq_dispose_mapping(spa->virq); - kfree(spa->irq_name); - unmap_irq_registers(spa); dev_err(&dev->dev, "request_irq failed for translation interrupt: %d\n", rc); - return -EINVAL; + rc = -EINVAL; + goto err_mapping; } return 0; + +err_mapping: + irq_dispose_mapping(spa->virq); +err_name: + kfree(spa->irq_name); +err_xsl: + unmap_irq_registers(spa); + return rc; } static void release_xsl_irq(struct link *link) -- 2.30.2