#include <linux/poll.h>
#include <linux/proc_fs.h>
#include <linux/mutex.h>
+#include <linux/smp_lock.h>
#include <linux/sysctl.h>
#include <linux/version.h>
#include <linux/fs.h>
struct hwicap_drvdata *drvdata;
int status;
+ lock_kernel();
drvdata = container_of(inode->i_cdev, struct hwicap_drvdata, cdev);
status = mutex_lock_interruptible(&drvdata->sem);
if (status)
- return status;
+ goto out;
if (drvdata->is_open) {
status = -EBUSY;
error:
mutex_unlock(&drvdata->sem);
+ out:
+ unlock_kernel();
return status;
}
if (!request_mem_region(drvdata->mem_start,
drvdata->mem_size, DRIVER_NAME)) {
- dev_err(dev, "Couldn't lock memory region at %p\n",
- (void *)regs_res->start);
+ dev_err(dev, "Couldn't lock memory region at %Lx\n",
+ regs_res->start);
retval = -EBUSY;
goto failed1;
}
mutex_init(&drvdata->sem);
drvdata->is_open = 0;
- dev_info(dev, "ioremap %lx to %p with size %x\n",
+ dev_info(dev, "ioremap %lx to %p with size %Lx\n",
(unsigned long int)drvdata->mem_start,
drvdata->base_address, drvdata->mem_size);