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authorAl Viro <viro@zeniv.linux.org.uk>2017-05-27 06:56:13 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2017-05-27 22:41:45 +0300
commitc02205e9f3f8e4429e5531981906bf25282938b7 (patch)
treefa9ea690f2ec67bca923ae50508a3443515244d2 /drivers/dio
parentf9f5796e7a534cc99cee577be47e109d5123baf1 (diff)
downloadlinux-c02205e9f3f8e4429e5531981906bf25282938b7.tar.xz
dio: use probe_kernel_read()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'drivers/dio')
-rw-r--r--drivers/dio/dio.c17
1 files changed, 2 insertions, 15 deletions
diff --git a/drivers/dio/dio.c b/drivers/dio/dio.c
index 830184529109..0d0677f23916 100644
--- a/drivers/dio/dio.c
+++ b/drivers/dio/dio.c
@@ -116,7 +116,6 @@ int __init dio_find(int deviceid)
*/
int scode, id;
u_char prid, secid, i;
- mm_segment_t fs;
for (scode = 0; scode < DIO_SCMAX; scode++) {
void *va;
@@ -135,17 +134,12 @@ int __init dio_find(int deviceid)
else
va = ioremap(pa, PAGE_SIZE);
- fs = get_fs();
- set_fs(KERNEL_DS);
-
- if (get_user(i, (unsigned char *)va + DIO_IDOFF)) {
- set_fs(fs);
+ if (probe_kernel_read(&i, (unsigned char *)va + DIO_IDOFF, 1)) {
if (scode >= DIOII_SCBASE)
iounmap(va);
continue; /* no board present at that select code */
}
- set_fs(fs);
prid = DIO_ID(va);
if (DIO_NEEDSSECID(prid)) {
@@ -170,7 +164,6 @@ int __init dio_find(int deviceid)
static int __init dio_init(void)
{
int scode;
- mm_segment_t fs;
int i;
struct dio_dev *dev;
int error;
@@ -214,18 +207,12 @@ static int __init dio_init(void)
else
va = ioremap(pa, PAGE_SIZE);
- fs = get_fs();
- set_fs(KERNEL_DS);
-
- if (get_user(i, (unsigned char *)va + DIO_IDOFF)) {
- set_fs(fs);
+ if (probe_kernel_read(&i, (unsigned char *)va + DIO_IDOFF, 1)) {
if (scode >= DIOII_SCBASE)
iounmap(va);
continue; /* no board present at that select code */
}
- set_fs(fs);
-
/* Found a board, allocate it an entry in the list */
dev = kzalloc(sizeof(struct dio_dev), GFP_KERNEL);
if (!dev)