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path: root/drivers/acpi/apei/erst-dbg.c
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Diffstat (limited to 'drivers/acpi/apei/erst-dbg.c')
-rw-r--r--drivers/acpi/apei/erst-dbg.c24
1 files changed, 21 insertions, 3 deletions
diff --git a/drivers/acpi/apei/erst-dbg.c b/drivers/acpi/apei/erst-dbg.c
index de73caf3cebc..a4cfb64c86a1 100644
--- a/drivers/acpi/apei/erst-dbg.c
+++ b/drivers/acpi/apei/erst-dbg.c
@@ -43,12 +43,27 @@ static DEFINE_MUTEX(erst_dbg_mutex);
static int erst_dbg_open(struct inode *inode, struct file *file)
{
+ int rc, *pos;
+
if (erst_disable)
return -ENODEV;
+ pos = (int *)&file->private_data;
+
+ rc = erst_get_record_id_begin(pos);
+ if (rc)
+ return rc;
+
return nonseekable_open(inode, file);
}
+static int erst_dbg_release(struct inode *inode, struct file *file)
+{
+ erst_get_record_id_end();
+
+ return 0;
+}
+
static long erst_dbg_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
{
int rc;
@@ -79,18 +94,20 @@ static long erst_dbg_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
static ssize_t erst_dbg_read(struct file *filp, char __user *ubuf,
size_t usize, loff_t *off)
{
- int rc;
+ int rc, *pos;
ssize_t len = 0;
u64 id;
- if (*off != 0)
+ if (*off)
return -EINVAL;
if (mutex_lock_interruptible(&erst_dbg_mutex) != 0)
return -EINTR;
+ pos = (int *)&filp->private_data;
+
retry_next:
- rc = erst_get_next_record_id(&id);
+ rc = erst_get_record_id_next(pos, &id);
if (rc)
goto out;
/* no more record */
@@ -181,6 +198,7 @@ out:
static const struct file_operations erst_dbg_ops = {
.owner = THIS_MODULE,
.open = erst_dbg_open,
+ .release = erst_dbg_release,
.read = erst_dbg_read,
.write = erst_dbg_write,
.unlocked_ioctl = erst_dbg_ioctl,
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