From 9486295ad159fac87eb05bd683445be06a3b69f5 Mon Sep 17 00:00:00 2001 From: Suzuki K Poulose Date: Thu, 25 Aug 2016 15:19:05 -0600 Subject: coresight: Use local coresight_desc instances Each coresight device prepares a description for coresight_register() in struct coresight_desc. Once we register the device, the description is useless and can be freed. The coresight_desc is small enough (48bytes on 64bit)i to be allocated on the stack. Hence use an automatic variable to avoid a needless dynamic allocation and wasting the memory(which will only be free'd when the device is destroyed). Cc: Mathieu Poirier Cc: Pratik Patel Signed-off-by: Suzuki K Poulose Signed-off-by: Mathieu Poirier Signed-off-by: Greg Kroah-Hartman --- drivers/hwtracing/coresight/coresight-stm.c | 22 ++++++++-------------- 1 file changed, 8 insertions(+), 14 deletions(-) (limited to 'drivers/hwtracing/coresight/coresight-stm.c') diff --git a/drivers/hwtracing/coresight/coresight-stm.c b/drivers/hwtracing/coresight/coresight-stm.c index 482c8bb27f87..819629aed2f7 100644 --- a/drivers/hwtracing/coresight/coresight-stm.c +++ b/drivers/hwtracing/coresight/coresight-stm.c @@ -799,7 +799,7 @@ static int stm_probe(struct amba_device *adev, const struct amba_id *id) struct resource *res = &adev->res; struct resource ch_res; size_t res_size, bitmap_size; - struct coresight_desc *desc; + struct coresight_desc desc = { 0 }; struct device_node *np = adev->dev.of_node; if (np) { @@ -865,19 +865,13 @@ static int stm_probe(struct amba_device *adev, const struct amba_id *id) return -EPROBE_DEFER; } - desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL); - if (!desc) { - ret = -ENOMEM; - goto stm_unregister; - } - - desc->type = CORESIGHT_DEV_TYPE_SOURCE; - desc->subtype.source_subtype = CORESIGHT_DEV_SUBTYPE_SOURCE_SOFTWARE; - desc->ops = &stm_cs_ops; - desc->pdata = pdata; - desc->dev = dev; - desc->groups = coresight_stm_groups; - drvdata->csdev = coresight_register(desc); + desc.type = CORESIGHT_DEV_TYPE_SOURCE; + desc.subtype.source_subtype = CORESIGHT_DEV_SUBTYPE_SOURCE_SOFTWARE; + desc.ops = &stm_cs_ops; + desc.pdata = pdata; + desc.dev = dev; + desc.groups = coresight_stm_groups; + drvdata->csdev = coresight_register(&desc); if (IS_ERR(drvdata->csdev)) { ret = PTR_ERR(drvdata->csdev); goto stm_unregister; -- cgit v1.2.1