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clk: keystone: gate: fix error handling on init

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This patch fixes Keystone gate control clock driver initialization path:
1) clk_register_psc() returns error code and not a pure pointer, hence
its return value need to be checked using IS_ERR(clk) macro.

2) Mapped IO memory isn't unmapped in case of errors, hence fix it.

Cc: Mike Turquette <mturquette@linaro.org
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
This commit is contained in:
Grygorii Strashko 2013-11-23 16:31:12 -05:00 committed by Santosh Shilimkar
parent dbb4e67fe7
commit e0c223ec67
1 changed files with 8 additions and 4 deletions
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12
drivers/clk/keystone/gate.c
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@ -223,8 +223,7 @@ static void __init of_psc_clk_init(struct device_node *node, spinlock_t *lock)
data->domain_base = of_iomap(node, i);
if (!data->domain_base) {
pr_err("%s: domain ioremap failed\n", __func__);
iounmap(data->control_base);
goto out;
goto unmap_ctrl;
}
of_property_read_u32(node, "domain-id", &data->domain_id);
@ -237,16 +236,21 @@ static void __init of_psc_clk_init(struct device_node *node, spinlock_t *lock)
parent_name = of_clk_get_parent_name(node, 0);
if (!parent_name) {
pr_err("%s: Parent clock not found\n", __func__);
goto out;
goto unmap_domain;
}
clk = clk_register_psc(NULL, clk_name, parent_name, data, lock);
if (clk) {
if (!IS_ERR(clk)) {
of_clk_add_provider(node, of_clk_src_simple_get, clk);
return;
}
pr_err("%s: error registering clk %s\n", __func__, node->name);
unmap_domain:
iounmap(data->domain_base);
unmap_ctrl:
iounmap(data->control_base);
out:
kfree(data);
return;