V4L/DVB (7302): pvrusb2: Improve control validation for enumerations
When an enumeration control is changed, the pvrusb2 driver assumed
that the enumeration values were continuous. That is no longer true;
this change allows for properly input validation even when not all
enumeration values are legal (which can happen with input selection
based on what the hardware supports).
Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/pvrusb2/pvrusb2-ctrl.c b/drivers/media/video/pvrusb2/pvrusb2-ctrl.c
index 5a3e8d2..91a42f2 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-ctrl.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-ctrl.c
@@ -30,6 +30,9 @@
{
if (cptr->info->check_value) {
if (!cptr->info->check_value(cptr,val)) return -ERANGE;
+ } else if (cptr->info->type == pvr2_ctl_enum) {
+ if (val < 0) return -ERANGE;
+ if (val >= cptr->info->def.type_enum.count) return -ERANGE;
} else {
int lim;
lim = cptr->info->def.type_int.min_value;
@@ -63,13 +66,10 @@
if (cptr->info->set_value) {
if (cptr->info->type == pvr2_ctl_bitmask) {
mask &= cptr->info->def.type_bitmask.valid_bits;
- } else if (cptr->info->type == pvr2_ctl_int) {
+ } else if ((cptr->info->type == pvr2_ctl_int)||
+ (cptr->info->type == pvr2_ctl_enum)) {
ret = pvr2_ctrl_range_check(cptr,val);
if (ret < 0) break;
- } else if (cptr->info->type == pvr2_ctl_enum) {
- if (val >= cptr->info->def.type_enum.count) {
- break;
- }
} else if (cptr->info->type != pvr2_ctl_bool) {
break;
}
@@ -204,8 +204,7 @@
if (cptr->info->type == pvr2_ctl_enum) {
const char **names;
names = cptr->info->def.type_enum.value_names;
- if ((val >= 0) &&
- (val < cptr->info->def.type_enum.count)) {
+ if (pvr2_ctrl_range_check(cptr,val) == 0) {
if (names[val]) {
*blen = scnprintf(
bptr,bmax,"%s",
@@ -528,10 +527,8 @@
ptr,len,valptr,
cptr->info->def.type_enum.value_names,
cptr->info->def.type_enum.count);
- if ((ret >= 0) &&
- ((*valptr < 0) ||
- (*valptr >= cptr->info->def.type_enum.count))) {
- ret = -ERANGE;
+ if (ret >= 0) {
+ ret = pvr2_ctrl_range_check(cptr,*valptr);
}
if (maskptr) *maskptr = ~0;
} else if (cptr->info->type == pvr2_ctl_bitmask) {