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authorTakashi Iwai <tiwai@suse.de>2018-07-25 23:00:57 +0200
committerTakashi Iwai <tiwai@suse.de>2018-07-26 08:33:16 +0200
commit63623646a06358833766016d8c1fe14d6576b3d0 (patch)
tree0272f9ccce8762cfa578d833949ae7f262c5fcce /sound/pci/emu10k1
parent0701492c86ac0446a834da35ef4991bcf8adb6c4 (diff)
downloadlinux-63623646a06358833766016d8c1fe14d6576b3d0.tar.bz2
ALSA: emu10k1: Fix missing __force annotation for user/kernel pointer cast
The cast between user-space and kernel-space needs an explicit __force prefix, but it's missing in many places in emu10k1 driver code. Spotted by sparse as a warning like: sound/pci/emu10k1/emufx.c:529:33: warning: cast removes address space of expression Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/emu10k1')
-rw-r--r--sound/pci/emu10k1/emufx.c24
1 files changed, 12 insertions, 12 deletions
diff --git a/sound/pci/emu10k1/emufx.c b/sound/pci/emu10k1/emufx.c
index de2ecbe95d6c..90713741c2dc 100644
--- a/sound/pci/emu10k1/emufx.c
+++ b/sound/pci/emu10k1/emufx.c
@@ -526,7 +526,7 @@ static int snd_emu10k1_gpr_poke(struct snd_emu10k1 *emu,
if (!test_bit(gpr, icode->gpr_valid))
continue;
if (in_kernel)
- val = *(u32 *)&icode->gpr_map[gpr];
+ val = *(__force u32 *)&icode->gpr_map[gpr];
else if (get_user(val, &icode->gpr_map[gpr]))
return -EFAULT;
snd_emu10k1_ptr_write(emu, emu->gpr_base + gpr, 0, val);
@@ -560,8 +560,8 @@ static int snd_emu10k1_tram_poke(struct snd_emu10k1 *emu,
if (!test_bit(tram, icode->tram_valid))
continue;
if (in_kernel) {
- val = *(u32 *)&icode->tram_data_map[tram];
- addr = *(u32 *)&icode->tram_addr_map[tram];
+ val = *(__force u32 *)&icode->tram_data_map[tram];
+ addr = *(__force u32 *)&icode->tram_addr_map[tram];
} else {
if (get_user(val, &icode->tram_data_map[tram]) ||
get_user(addr, &icode->tram_addr_map[tram]))
@@ -611,8 +611,8 @@ static int snd_emu10k1_code_poke(struct snd_emu10k1 *emu,
if (!test_bit(pc / 2, icode->code_valid))
continue;
if (in_kernel) {
- lo = *(u32 *)&icode->code[pc + 0];
- hi = *(u32 *)&icode->code[pc + 1];
+ lo = *(__force u32 *)&icode->code[pc + 0];
+ hi = *(__force u32 *)&icode->code[pc + 1];
} else {
if (get_user(lo, &icode->code[pc + 0]) ||
get_user(hi, &icode->code[pc + 1]))
@@ -666,7 +666,7 @@ static unsigned int *copy_tlv(const unsigned int __user *_tlv, bool in_kernel)
if (!_tlv)
return NULL;
if (in_kernel)
- memcpy(data, (void *)_tlv, sizeof(data));
+ memcpy(data, (__force void *)_tlv, sizeof(data));
else if (copy_from_user(data, _tlv, sizeof(data)))
return NULL;
if (data[1] >= MAX_TLV_SIZE)
@@ -676,7 +676,7 @@ static unsigned int *copy_tlv(const unsigned int __user *_tlv, bool in_kernel)
return NULL;
memcpy(tlv, data, sizeof(data));
if (in_kernel) {
- memcpy(tlv + 2, (void *)(_tlv + 2), data[1]);
+ memcpy(tlv + 2, (__force void *)(_tlv + 2), data[1]);
} else if (copy_from_user(tlv + 2, _tlv + 2, data[1])) {
kfree(tlv);
return NULL;
@@ -693,7 +693,7 @@ static int copy_gctl(struct snd_emu10k1 *emu,
if (emu->support_tlv) {
if (in_kernel)
- memcpy(gctl, (void *)&_gctl[idx], sizeof(*gctl));
+ memcpy(gctl, (__force void *)&_gctl[idx], sizeof(*gctl));
else if (copy_from_user(gctl, &_gctl[idx], sizeof(*gctl)))
return -EFAULT;
return 0;
@@ -701,7 +701,7 @@ static int copy_gctl(struct snd_emu10k1 *emu,
octl = (struct snd_emu10k1_fx8010_control_old_gpr __user *)_gctl;
if (in_kernel)
- memcpy(gctl, (void *)&octl[idx], sizeof(*octl));
+ memcpy(gctl, (__force void *)&octl[idx], sizeof(*octl));
else if (copy_from_user(gctl, &octl[idx], sizeof(*octl)))
return -EFAULT;
gctl->tlv = NULL;
@@ -735,7 +735,7 @@ static int snd_emu10k1_verify_controls(struct snd_emu10k1 *emu,
for (i = 0, _id = icode->gpr_del_controls;
i < icode->gpr_del_control_count; i++, _id++) {
if (in_kernel)
- id = *(struct snd_ctl_elem_id *)_id;
+ id = *(__force struct snd_ctl_elem_id *)_id;
else if (copy_from_user(&id, _id, sizeof(id)))
return -EFAULT;
if (snd_emu10k1_look_for_ctl(emu, &id) == NULL)
@@ -833,7 +833,7 @@ static int snd_emu10k1_add_controls(struct snd_emu10k1 *emu,
knew.device = gctl->id.device;
knew.subdevice = gctl->id.subdevice;
knew.info = snd_emu10k1_gpr_ctl_info;
- knew.tlv.p = copy_tlv(gctl->tlv, in_kernel);
+ knew.tlv.p = copy_tlv((__force const unsigned int __user *)gctl->tlv, in_kernel);
if (knew.tlv.p)
knew.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
SNDRV_CTL_ELEM_ACCESS_TLV_READ;
@@ -897,7 +897,7 @@ static int snd_emu10k1_del_controls(struct snd_emu10k1 *emu,
for (i = 0, _id = icode->gpr_del_controls;
i < icode->gpr_del_control_count; i++, _id++) {
if (in_kernel)
- id = *(struct snd_ctl_elem_id *)_id;
+ id = *(__force struct snd_ctl_elem_id *)_id;
else if (copy_from_user(&id, _id, sizeof(id)))
return -EFAULT;
down_write(&card->controls_rwsem);