[PATCH] cxl: Release irqs if memory allocation fails
From: Vaibhav Jain <hidden>
Date: 2015-08-25 05:35:17
This minor patch plugs a potential irq leak in case of a memory allocation failure inside function the afu_allocate_irqs. Presently the irqs allocated to the context gets leaked if allocation of either one of context irq_bitmap or irq_names fails. Signed-off-by: Vaibhav Jain <redacted> --- drivers/misc/cxl/irq.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/misc/cxl/irq.c b/drivers/misc/cxl/irq.c
index c8f1f9d..e8b887e 100644
--- a/drivers/misc/cxl/irq.c
+++ b/drivers/misc/cxl/irq.c@@ -421,6 +421,9 @@ int afu_allocate_irqs(struct cxl_context *ctx, u32 count) int rc, r, i, j = 1; struct cxl_irq_name *irq_name; + /* Initialize the list head to hold irq names */ + INIT_LIST_HEAD(&ctx->irq_names); + if ((rc = cxl_alloc_irq_ranges(&ctx->irqs, ctx->afu->adapter, count))) return rc;
@@ -432,13 +435,12 @@ int afu_allocate_irqs(struct cxl_context *ctx, u32 count) ctx->irq_bitmap = kcalloc(BITS_TO_LONGS(count), sizeof(*ctx->irq_bitmap), GFP_KERNEL); if (!ctx->irq_bitmap) - return -ENOMEM; + goto out; /* * Allocate names first. If any fail, bail out before allocating * actual hardware IRQs. */ - INIT_LIST_HEAD(&ctx->irq_names); for (r = 1; r < CXL_IRQ_RANGES; r++) { for (i = 0; i < ctx->irqs.range[r]; i++) { irq_name = kmalloc(sizeof(struct cxl_irq_name),
@@ -460,6 +462,7 @@ int afu_allocate_irqs(struct cxl_context *ctx, u32 count) return 0; out: + cxl_release_irq_ranges(&ctx->irqs, ctx->afu->adapter); afu_irq_name_free(ctx); return -ENOMEM; }
--
2.2.1