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| author | Sudeep Holla <sudeep.holla@arm.com> | 2018-05-09 17:52:06 +0100 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@arm.com> | 2018-05-10 10:51:59 +0100 |
| commit | ec42ac6d1ea3118210c265ea532b2ab66e18098d (patch) | |
| tree | aa116c43e01e1ce199b1451312616264788748b8 /drivers/firmware | |
| parent | 8f3397ccb63ac3b0ddcc759565bcd66977c4eb1a (diff) | |
| download | linux-stable-ec42ac6d1ea3118210c265ea532b2ab66e18098d.tar.gz linux-stable-ec42ac6d1ea3118210c265ea532b2ab66e18098d.tar.bz2 linux-stable-ec42ac6d1ea3118210c265ea532b2ab66e18098d.zip | |
firmware: arm_scmi: improve exit paths and code readability
The existing code intends the good path to reduce the code which is so
uncommon. It's obvious to have more readable code with a goto used for
the error path. This patch adds more appropriate error paths and makes
code more readable. It also moves a error logging outside the scope of
locking.
Suggested-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/arm_scmi/bus.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/drivers/firmware/arm_scmi/bus.c b/drivers/firmware/arm_scmi/bus.c index f2760a596c28..472c88ae1c0f 100644 --- a/drivers/firmware/arm_scmi/bus.c +++ b/drivers/firmware/arm_scmi/bus.c @@ -125,13 +125,13 @@ scmi_device_create(struct device_node *np, struct device *parent, int protocol) int id, retval; struct scmi_device *scmi_dev; - id = ida_simple_get(&scmi_bus_id, 1, 0, GFP_KERNEL); - if (id < 0) - return NULL; - scmi_dev = kzalloc(sizeof(*scmi_dev), GFP_KERNEL); if (!scmi_dev) - goto no_mem; + return NULL; + + id = ida_simple_get(&scmi_bus_id, 1, 0, GFP_KERNEL); + if (id < 0) + goto free_mem; scmi_dev->id = id; scmi_dev->protocol_id = protocol; @@ -141,13 +141,15 @@ scmi_device_create(struct device_node *np, struct device *parent, int protocol) dev_set_name(&scmi_dev->dev, "scmi_dev.%d", id); retval = device_register(&scmi_dev->dev); - if (!retval) - return scmi_dev; + if (retval) + goto put_dev; + return scmi_dev; +put_dev: put_device(&scmi_dev->dev); - kfree(scmi_dev); -no_mem: ida_simple_remove(&scmi_bus_id, id); +free_mem: + kfree(scmi_dev); return NULL; } @@ -171,9 +173,9 @@ int scmi_protocol_register(int protocol_id, scmi_prot_init_fn_t fn) spin_lock(&protocol_lock); ret = idr_alloc(&scmi_protocols, fn, protocol_id, protocol_id + 1, GFP_ATOMIC); + spin_unlock(&protocol_lock); if (ret != protocol_id) pr_err("unable to allocate SCMI idr slot, err %d\n", ret); - spin_unlock(&protocol_lock); return ret; } |