From 8f1d57c172482c9a1568ec647fc5c2e64c6c6a57 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sat, 2 Jan 2016 15:06:19 -0500 Subject: [PATCH] amdkfd: don't open-code memdup_user() Signed-off-by: Al Viro --- drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 33 +++++------------------- 1 file changed, 7 insertions(+), 26 deletions(-) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c index c6a1b4cc6458..d321222fd92e 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c @@ -559,19 +559,10 @@ static int kfd_ioctl_dbg_address_watch(struct file *filep, /* this is the actual buffer to work with */ - args_buff = kmalloc(args->buf_size_in_bytes - - sizeof(*args), GFP_KERNEL); - if (args_buff == NULL) - return -ENOMEM; - - status = copy_from_user(args_buff, cmd_from_user, + args_buff = memdup_user(args_buff, args->buf_size_in_bytes - sizeof(*args)); - - if (status != 0) { - pr_debug("Failed to copy address watch user data\n"); - kfree(args_buff); - return -EINVAL; - } + if (IS_ERR(args_buff)) + return PTR_ERR(args_buff); aw_info.process = p; @@ -677,22 +668,12 @@ static int kfd_ioctl_dbg_wave_control(struct file *filep, if (cmd_from_user == NULL) return -EINVAL; - /* this is the actual buffer to work with */ + /* copy the entire buffer from user */ - args_buff = kmalloc(args->buf_size_in_bytes - sizeof(*args), - GFP_KERNEL); - - if (args_buff == NULL) - return -ENOMEM; - - /* Now copy the entire buffer from user */ - status = copy_from_user(args_buff, cmd_from_user, + args_buff = memdup_user(cmd_from_user, args->buf_size_in_bytes - sizeof(*args)); - if (status != 0) { - pr_debug("Failed to copy wave control user data\n"); - kfree(args_buff); - return -EINVAL; - } + if (IS_ERR(args_buff)) + return PTR_ERR(args_buff); /* move ptr to the start of the "pay-load" area */ wac_info.process = p; -- 2.34.1