Implement ->proc_read_buf() so procfs copies what is read from
/proc/bus/zorro/<slot> to userspace after it unpinned the entry.
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
---
drivers/zorro/proc.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/drivers/zorro/proc.c b/drivers/zorro/proc.c
index f916bf60b312..4e4ba04752ea 100644
--- a/drivers/zorro/proc.c
+++ b/drivers/zorro/proc.c
@@ -28,7 +28,7 @@ proc_bus_zorro_lseek(struct file *file, loff_t off, int whence)
}
static ssize_t
-proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
+proc_bus_zorro_read(struct file *file, char *buf, size_t nbytes, loff_t *ppos)
{
struct zorro_dev *z = pde_data(file_inode(file));
struct ConfigDev cd;@@ -49,8 +49,7 @@ proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t *
cd.cd_BoardAddr = cpu_to_be32(zorro_resource_start(z));
cd.cd_BoardSize = cpu_to_be32(zorro_resource_len(z));
- if (copy_to_user(buf, (void *)&cd + pos, nbytes))
- return -EFAULT;
+ memcpy(buf, (void *)&cd + pos, nbytes);
*ppos += nbytes;
return nbytes;
@@ -58,7 +57,7 @@ proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t *
static const struct proc_ops bus_zorro_proc_ops = {
.proc_lseek = proc_bus_zorro_lseek,
- .proc_read = proc_bus_zorro_read,
+ .proc_read_buf = proc_bus_zorro_read,
};
static void * zorro_seq_start(struct seq_file *m, loff_t *pos)
--
2.53.0