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authorLinus Torvalds <torvalds@linux-foundation.org>2017-07-06 22:06:11 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-07-06 22:06:11 -0700
commit90880b532a7ebd13a052d6c410807b33809a3efb (patch)
treecae2ad7874c8d8f29e30a0bea43dd29752a8fba4 /drivers
parent1c91d2c6915b288bc8595b21d37e1bb662a40e55 (diff)
parentc02205e9f3f8e4429e5531981906bf25282938b7 (diff)
Merge branch 'work.probe_kernel_read' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull probe_kernel_read() uses from Al Viro: "Several open-coded probe_kernel_read()..." * 'work.probe_kernel_read' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: dio: use probe_kernel_read() hp_sdc: use probe_kernel_read() hpfb: use probe_kernel_read()
Diffstat (limited to 'drivers')
-rw-r--r--drivers/dio/dio.c17
-rw-r--r--drivers/input/serio/hp_sdc.c6
-rw-r--r--drivers/video/fbdev/hpfb.c6
3 files changed, 4 insertions, 25 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)
diff --git a/drivers/input/serio/hp_sdc.c b/drivers/input/serio/hp_sdc.c
index 559c99ca6592..1bfdae4b0d99 100644
--- a/drivers/input/serio/hp_sdc.c
+++ b/drivers/input/serio/hp_sdc.c
@@ -1001,7 +1001,6 @@ static int __init hp_sdc_register(void)
uint8_t tq_init_seq[5];
struct semaphore tq_init_sem;
#if defined(__mc68000__)
- mm_segment_t fs;
unsigned char i;
#endif
@@ -1026,11 +1025,8 @@ static int __init hp_sdc_register(void)
hp_sdc.base_io = (unsigned long) 0xf0428000;
hp_sdc.data_io = (unsigned long) hp_sdc.base_io + 1;
hp_sdc.status_io = (unsigned long) hp_sdc.base_io + 3;
- fs = get_fs();
- set_fs(KERNEL_DS);
- if (!get_user(i, (unsigned char *)hp_sdc.data_io))
+ if (!probe_kernel_read(&i, (unsigned char *)hp_sdc.data_io, 1))
hp_sdc.dev = (void *)1;
- set_fs(fs);
hp_sdc.dev_err = hp_sdc_init();
#endif
if (hp_sdc.dev == NULL) {
diff --git a/drivers/video/fbdev/hpfb.c b/drivers/video/fbdev/hpfb.c
index 16f16f5e1a4b..9230db9ea94b 100644
--- a/drivers/video/fbdev/hpfb.c
+++ b/drivers/video/fbdev/hpfb.c
@@ -377,7 +377,6 @@ static struct dio_driver hpfb_driver = {
int __init hpfb_init(void)
{
unsigned int sid;
- mm_segment_t fs;
unsigned char i;
int err;
@@ -402,10 +401,7 @@ int __init hpfb_init(void)
if (err)
return err;
- fs = get_fs();
- set_fs(KERNEL_DS);
- err = get_user(i, (unsigned char *)INTFBVADDR + DIO_IDOFF);
- set_fs(fs);
+ err = probe_kernel_read(&i, (unsigned char *)INTFBVADDR + DIO_IDOFF, 1);
if (!err && (i == DIO_ID_FBUFFER) && topcat_sid_ok(sid = DIO_SECID(INTFBVADDR))) {
if (!request_mem_region(INTFBPADDR, DIO_DEVSIZE, "Internal Topcat"))