Implement ->proc_read_buf() so procfs copies what is read from /proc/net/atm/<dev> to userspace after it unpinned the entry. The drivers' ->proc_read() keep filling their page.
Signed-off-by: Christian Brauner (Amutable) <[email protected]> --- net/atm/proc.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/net/atm/proc.c b/net/atm/proc.c index ca0fc6b90998..cea930b4b840 100644 --- a/net/atm/proc.c +++ b/net/atm/proc.c @@ -30,11 +30,11 @@ #include "resources.h" #include "common.h" /* atm_proc_init prototype */ -static ssize_t proc_dev_atm_read(struct file *file, char __user *buf, +static ssize_t proc_dev_atm_read(struct file *file, char *buf, size_t count, loff_t *pos); static const struct proc_ops atm_dev_proc_ops = { - .proc_read = proc_dev_atm_read, + .proc_read_buf = proc_dev_atm_read, .proc_lseek = noop_llseek, }; @@ -246,7 +246,7 @@ static const struct seq_operations vcc_seq_ops = { .show = vcc_seq_show, }; -static ssize_t proc_dev_atm_read(struct file *file, char __user *buf, +static ssize_t proc_dev_atm_read(struct file *file, char *buf, size_t count, loff_t *pos) { struct atm_dev *dev; @@ -267,8 +267,7 @@ static ssize_t proc_dev_atm_read(struct file *file, char __user *buf, length = -EINVAL; } if (length >= 0) { - if (copy_to_user(buf, (char *)page, length)) - length = -EFAULT; + memcpy(buf, (char *)page, length); (*pos)++; } free_page(page); -- 2.53.0
