From e640d2fc811ff8cc1451f92490d3ccc2adcad179 Mon Sep 17 00:00:00 2001 From: Daniel Axtens Date: Fri, 14 Aug 2015 17:41:20 +1000 Subject: [PATCH] cxl: Make IRQ release idempotent Check if an IRQ is mapped before releasing it. This will simplify future EEH code by allowing unconditional unmapping of IRQs. Acked-by: Cyril Bur Signed-off-by: Daniel Axtens Signed-off-by: Michael Ellerman --- drivers/misc/cxl/irq.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/misc/cxl/irq.c b/drivers/misc/cxl/irq.c index b6b04374c10c..62823784f68e 100644 --- a/drivers/misc/cxl/irq.c +++ b/drivers/misc/cxl/irq.c @@ -341,6 +341,9 @@ int cxl_register_psl_err_irq(struct cxl *adapter) void cxl_release_psl_err_irq(struct cxl *adapter) { + if (adapter->err_virq != irq_find_mapping(NULL, adapter->err_hwirq)) + return; + cxl_p1_write(adapter, CXL_PSL_ErrIVTE, 0x0000000000000000); cxl_unmap_irq(adapter->err_virq, adapter); cxl_release_one_irq(adapter, adapter->err_hwirq); @@ -374,6 +377,9 @@ int cxl_register_serr_irq(struct cxl_afu *afu) void cxl_release_serr_irq(struct cxl_afu *afu) { + if (afu->serr_virq != irq_find_mapping(NULL, afu->serr_hwirq)) + return; + cxl_p1n_write(afu, CXL_PSL_SERR_An, 0x0000000000000000); cxl_unmap_irq(afu->serr_virq, afu); cxl_release_one_irq(afu->adapter, afu->serr_hwirq); @@ -400,6 +406,9 @@ int cxl_register_psl_irq(struct cxl_afu *afu) void cxl_release_psl_irq(struct cxl_afu *afu) { + if (afu->psl_virq != irq_find_mapping(NULL, afu->psl_hwirq)) + return; + cxl_unmap_irq(afu->psl_virq, afu); cxl_release_one_irq(afu->adapter, afu->psl_hwirq); kfree(afu->psl_irq_name); -- 2.39.2