diff options
| author |   Vaibhav Jain <vaibhav@linux.vnet.ibm.com> | 2015-08-25 11:04:48 +0530 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2015-08-27 13:51:18 +1000 |
| commit | a6897f39660cc07fa78b4459d82f12b07abb50b1 (patch) | |
| tree | 65e2cdb08682a98de731de244ca79656972e327c /drivers/misc | |
| parent | cxl: Remove use of macro DEFINE_PCI_DEVICE_TABLE (diff) | |
| download | linux-dev-a6897f39660cc07fa78b4459d82f12b07abb50b1.tar.xz linux-dev-a6897f39660cc07fa78b4459d82f12b07abb50b1.zip | |
cxl: Release irqs if memory allocation fails
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 <vaibhav@linux.vnet.ibm.com>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/cxl/irq.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/misc/cxl/irq.c b/drivers/misc/cxl/irq.c index 72bf45ae3806..583b42afeda2 100644 --- a/drivers/misc/cxl/irq.c +++ b/drivers/misc/cxl/irq.c @@ -430,6 +430,9 @@ 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; @@ -441,13 +444,12 @@ 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), @@ -469,6 +471,7 @@ 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; } |