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path: root/drivers/misc/hdpuftrs
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Diffstat (limited to 'drivers/misc/hdpuftrs')
-rw-r--r--drivers/misc/hdpuftrs/hdpu_cpustate.c23
1 files changed, 19 insertions, 4 deletions
diff --git a/drivers/misc/hdpuftrs/hdpu_cpustate.c b/drivers/misc/hdpuftrs/hdpu_cpustate.c
index 7501fab349e4..46de5c940555 100644
--- a/drivers/misc/hdpuftrs/hdpu_cpustate.c
+++ b/drivers/misc/hdpuftrs/hdpu_cpustate.c
@@ -192,22 +192,37 @@ static int hdpu_cpustate_probe(struct device *ddev)
{
struct platform_device *pdev = to_platform_device(ddev);
struct resource *res;
+ struct proc_dir_entry *proc_de;
+ int ret;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
cpustate.set_addr = (unsigned long *)res->start;
cpustate.clr_addr = (unsigned long *)res->end - 1;
- misc_register(&cpustate_dev);
- create_proc_read_entry("sky_cpustate", 0, 0, cpustate_read_proc, NULL);
+ ret = misc_register(&cpustate_dev);
+ if (ret) {
+ printk(KERN_WARNING "sky_cpustate: Unable to register misc "
+ "device.\n");
+ cpustate.set_addr = NULL;
+ cpustate.clr_addr = NULL;
+ return ret;
+ }
+
+ proc_de = create_proc_read_entry("sky_cpustate", 0, 0,
+ cpustate_read_proc, NULL);
+ if (proc_de == NULL)
+ printk(KERN_WARNING "sky_cpustate: Unable to create proc "
+ "dir entry\n");
printk(KERN_INFO "Sky CPU State Driver v" SKY_CPUSTATE_VERSION "\n");
return 0;
}
+
static int hdpu_cpustate_remove(struct device *ddev)
{
- cpustate.set_addr = 0;
- cpustate.clr_addr = 0;
+ cpustate.set_addr = NULL;
+ cpustate.clr_addr = NULL;
remove_proc_entry("sky_cpustate", NULL);
misc_deregister(&cpustate_dev);