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提交 d42fe63d 编写于 作者: T Takashi Iwai
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ALSA: emu10k1: Get rid of set_fs() usage 

Instead of set_fs() hackery, do the straight memcpy() by passing a
flag indicating the kernel space operation.
Reviewed-by: NTakashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
上级 3ac8226f
隐藏空白更改
内联 并排
Showing with 73 addition and 54 deletion
sound/pci/emu10k1/emufx.c
浏览文件 @ d42fe63d
......@@ -310,21 +310,6 @@ static const u32 onoff_table[2] = {
0x00000000, 0x00000001
};
/*
*/
static inline mm_segment_t snd_enter_user(void)
{
mm_segment_t fs = get_fs();
set_fs(get_ds());
return fs;
}
static inline void snd_leave_user(mm_segment_t fs)
{
set_fs(fs);
}
/*
* controls
*/
......@@ -538,7 +523,8 @@ unsigned int snd_emu10k1_efx_read(struct snd_emu10k1 *emu, unsigned int pc)
}
static int snd_emu10k1_gpr_poke(struct snd_emu10k1 *emu,
struct snd_emu10k1_fx8010_code *icode)
struct snd_emu10k1_fx8010_code *icode,
bool in_kernel)
{
int gpr;
u32 val;
......@@ -546,7 +532,9 @@ static int snd_emu10k1_gpr_poke(struct snd_emu10k1 *emu,
for (gpr = 0; gpr < (emu->audigy ? 0x200 : 0x100); gpr++) {
if (!test_bit(gpr, icode->gpr_valid))
continue;
if (get_user(val, &icode->gpr_map[gpr]))
if (in_kernel)
val = *(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);
}
......@@ -569,7 +557,8 @@ static int snd_emu10k1_gpr_peek(struct snd_emu10k1 *emu,
}
static int snd_emu10k1_tram_poke(struct snd_emu10k1 *emu,
struct snd_emu10k1_fx8010_code *icode)
struct snd_emu10k1_fx8010_code *icode,
bool in_kernel)
{
int tram;
u32 addr, val;
......@@ -577,9 +566,14 @@ static int snd_emu10k1_tram_poke(struct snd_emu10k1 *emu,
for (tram = 0; tram < (emu->audigy ? 0x100 : 0xa0); tram++) {
if (!test_bit(tram, icode->tram_valid))
continue;
if (get_user(val, &icode->tram_data_map[tram]) ||
get_user(addr, &icode->tram_addr_map[tram]))
return -EFAULT;
if (in_kernel) {
val = *(u32 *)&icode->tram_data_map[tram];
addr = *(u32 *)&icode->tram_addr_map[tram];
} else {
if (get_user(val, &icode->tram_data_map[tram]) ||
get_user(addr, &icode->tram_addr_map[tram]))
return -EFAULT;
}
snd_emu10k1_ptr_write(emu, TANKMEMDATAREGBASE + tram, 0, val);
if (!emu->audigy) {
snd_emu10k1_ptr_write(emu, TANKMEMADDRREGBASE + tram, 0, addr);
......@@ -615,16 +609,22 @@ static int snd_emu10k1_tram_peek(struct snd_emu10k1 *emu,
}
static int snd_emu10k1_code_poke(struct snd_emu10k1 *emu,
struct snd_emu10k1_fx8010_code *icode)
struct snd_emu10k1_fx8010_code *icode,
bool in_kernel)
{
u32 pc, lo, hi;
for (pc = 0; pc < (emu->audigy ? 2*1024 : 2*512); pc += 2) {
if (!test_bit(pc / 2, icode->code_valid))
continue;
if (get_user(lo, &icode->code[pc + 0]) ||
get_user(hi, &icode->code[pc + 1]))
return -EFAULT;
if (in_kernel) {
lo = *(u32 *)&icode->code[pc + 0];
hi = *(u32 *)&icode->code[pc + 1];
} else {
if (get_user(lo, &icode->code[pc + 0]) ||
get_user(hi, &icode->code[pc + 1]))
return -EFAULT;
}
snd_emu10k1_efx_write(emu, pc + 0, lo);
snd_emu10k1_efx_write(emu, pc + 1, hi);
}
......@@ -665,14 +665,16 @@ snd_emu10k1_look_for_ctl(struct snd_emu10k1 *emu, struct snd_ctl_elem_id *id)
#define MAX_TLV_SIZE 256
static unsigned int *copy_tlv(const unsigned int __user *_tlv)
static unsigned int *copy_tlv(const unsigned int __user *_tlv, bool in_kernel)
{
unsigned int data[2];
unsigned int *tlv;
if (!_tlv)
return NULL;
if (copy_from_user(data, _tlv, sizeof(data)))
if (in_kernel)
memcpy(data, (void *)_tlv, sizeof(data));
else if (copy_from_user(data, _tlv, sizeof(data)))
return NULL;
if (data[1] >= MAX_TLV_SIZE)
return NULL;
......@@ -680,7 +682,9 @@ static unsigned int *copy_tlv(const unsigned int __user *_tlv)
if (!tlv)
return NULL;
memcpy(tlv, data, sizeof(data));
if (copy_from_user(tlv + 2, _tlv + 2, data[1])) {
if (in_kernel) {
memcpy(tlv + 2, (void *)(_tlv + 2), data[1]);
} else if (copy_from_user(tlv + 2, _tlv + 2, data[1])) {
kfree(tlv);
return NULL;
}
......@@ -690,7 +694,7 @@ static unsigned int *copy_tlv(const unsigned int __user *_tlv)
static int copy_gctl(struct snd_emu10k1 *emu,
struct snd_emu10k1_fx8010_control_gpr *gctl,
struct snd_emu10k1_fx8010_control_gpr __user *_gctl,
int idx)
int idx, bool in_kernel)
{
struct snd_emu10k1_fx8010_control_old_gpr __user *octl;
......@@ -718,7 +722,8 @@ static int copy_gctl_to_user(struct snd_emu10k1 *emu,
}
static int snd_emu10k1_verify_controls(struct snd_emu10k1 *emu,
struct snd_emu10k1_fx8010_code *icode)
struct snd_emu10k1_fx8010_code *icode,
bool in_kernel)
{
unsigned int i;
struct snd_ctl_elem_id __user *_id;
......@@ -728,7 +733,9 @@ 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 (copy_from_user(&id, _id, sizeof(id)))
if (in_kernel)
id = *(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)
return -ENOENT;
......@@ -738,7 +745,8 @@ static int snd_emu10k1_verify_controls(struct snd_emu10k1 *emu,
return -ENOMEM;
err = 0;
for (i = 0; i < icode->gpr_add_control_count; i++) {
if (copy_gctl(emu, gctl, icode->gpr_add_controls, i)) {
if (copy_gctl(emu, gctl, icode->gpr_add_controls, i,
in_kernel)) {
err = -EFAULT;
goto __error;
}
......@@ -759,7 +767,8 @@ static int snd_emu10k1_verify_controls(struct snd_emu10k1 *emu,
}
for (i = 0; i < icode->gpr_list_control_count; i++) {
/* FIXME: we need to check the WRITE access */
if (copy_gctl(emu, gctl, icode->gpr_list_controls, i)) {
if (copy_gctl(emu, gctl, icode->gpr_list_controls, i,
in_kernel)) {
err = -EFAULT;
goto __error;
}
......@@ -781,7 +790,8 @@ static void snd_emu10k1_ctl_private_free(struct snd_kcontrol *kctl)
}
static int snd_emu10k1_add_controls(struct snd_emu10k1 *emu,
struct snd_emu10k1_fx8010_code *icode)
struct snd_emu10k1_fx8010_code *icode,
bool in_kernel)
{
unsigned int i, j;
struct snd_emu10k1_fx8010_control_gpr *gctl;
......@@ -800,7 +810,8 @@ static int snd_emu10k1_add_controls(struct snd_emu10k1 *emu,
}
for (i = 0; i < icode->gpr_add_control_count; i++) {
if (copy_gctl(emu, gctl, icode->gpr_add_controls, i)) {
if (copy_gctl(emu, gctl, icode->gpr_add_controls, i,
in_kernel)) {
err = -EFAULT;
goto __error;
}
......@@ -821,7 +832,7 @@ 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);
knew.tlv.p = copy_tlv(gctl->tlv, in_kernel);
if (knew.tlv.p)
knew.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
SNDRV_CTL_ELEM_ACCESS_TLV_READ;
......@@ -873,7 +884,8 @@ static int snd_emu10k1_add_controls(struct snd_emu10k1 *emu,
}
static int snd_emu10k1_del_controls(struct snd_emu10k1 *emu,
struct snd_emu10k1_fx8010_code *icode)
struct snd_emu10k1_fx8010_code *icode,
bool in_kernel)
{
unsigned int i;
struct snd_ctl_elem_id id;
......@@ -883,7 +895,9 @@ 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 (copy_from_user(&id, _id, sizeof(id)))
if (in_kernel)
id = *(struct snd_ctl_elem_id *)_id;
else if (copy_from_user(&id, _id, sizeof(id)))
return -EFAULT;
down_write(&card->controls_rwsem);
ctl = snd_emu10k1_look_for_ctl(emu, &id);
......@@ -941,12 +955,14 @@ static int snd_emu10k1_list_controls(struct snd_emu10k1 *emu,
}
static int snd_emu10k1_icode_poke(struct snd_emu10k1 *emu,
struct snd_emu10k1_fx8010_code *icode)
struct snd_emu10k1_fx8010_code *icode,
bool in_kernel)
{
int err = 0;
mutex_lock(&emu->fx8010.lock);
if ((err = snd_emu10k1_verify_controls(emu, icode)) < 0)
err = snd_emu10k1_verify_controls(emu, icode, in_kernel);
if (err < 0)
goto __error;
strlcpy(emu->fx8010.name, icode->name, sizeof(emu->fx8010.name));
/* stop FX processor - this may be dangerous, but it's better to miss
......@@ -956,11 +972,20 @@ static int snd_emu10k1_icode_poke(struct snd_emu10k1 *emu,
else
snd_emu10k1_ptr_write(emu, DBG, 0, emu->fx8010.dbg | EMU10K1_DBG_SINGLE_STEP);
/* ok, do the main job */
if ((err = snd_emu10k1_del_controls(emu, icode)) < 0 ||
(err = snd_emu10k1_gpr_poke(emu, icode)) < 0 ||
(err = snd_emu10k1_tram_poke(emu, icode)) < 0 ||
(err = snd_emu10k1_code_poke(emu, icode)) < 0 ||
(err = snd_emu10k1_add_controls(emu, icode)) < 0)
err = snd_emu10k1_del_controls(emu, icode, in_kernel);
if (err < 0)
goto __error;
err = snd_emu10k1_gpr_poke(emu, icode, in_kernel);
if (err < 0)
goto __error;
err = snd_emu10k1_tram_poke(emu, icode, in_kernel);
if (err < 0)
goto __error;
err = snd_emu10k1_code_poke(emu, icode, in_kernel);
if (err < 0)
goto __error;
err = snd_emu10k1_add_controls(emu, icode, in_kernel);
if (err < 0)
goto __error;
/* start FX processor when the DSP code is updated */
if (emu->audigy)
......@@ -1179,7 +1204,6 @@ static int _snd_emu10k1_audigy_init_efx(struct snd_emu10k1 *emu)
struct snd_emu10k1_fx8010_code *icode = NULL;
struct snd_emu10k1_fx8010_control_gpr *controls = NULL, *ctl;
u32 *gpr_map;
mm_segment_t seg;
err = -ENOMEM;
icode = kzalloc(sizeof(*icode), GFP_KERNEL);
......@@ -1739,13 +1763,11 @@ A_OP(icode, &ptr, iMAC0, A_GPR(var), A_GPR(var), A_GPR(vol), A_EXTIN(input))
while (ptr < 0x400)
A_OP(icode, &ptr, 0x0f, 0xc0, 0xc0, 0xcf, 0xc0);
seg = snd_enter_user();
icode->gpr_add_control_count = nctl;
icode->gpr_add_controls = (struct snd_emu10k1_fx8010_control_gpr __user *)controls;
emu->support_tlv = 1; /* support TLV */
err = snd_emu10k1_icode_poke(emu, icode);
err = snd_emu10k1_icode_poke(emu, icode, true);
emu->support_tlv = 0; /* clear again */
snd_leave_user(seg);
__err:
kfree(controls);
......@@ -1817,7 +1839,6 @@ static int _snd_emu10k1_init_efx(struct snd_emu10k1 *emu)
struct snd_emu10k1_fx8010_pcm_rec *ipcm = NULL;
struct snd_emu10k1_fx8010_control_gpr *controls = NULL, *ctl;
u32 *gpr_map;
mm_segment_t seg;
err = -ENOMEM;
icode = kzalloc(sizeof(*icode), GFP_KERNEL);
......@@ -2368,13 +2389,11 @@ static int _snd_emu10k1_init_efx(struct snd_emu10k1 *emu)
if ((err = snd_emu10k1_fx8010_tram_setup(emu, ipcm->buffer_size)) < 0)
goto __err;
seg = snd_enter_user();
icode->gpr_add_control_count = i;
icode->gpr_add_controls = (struct snd_emu10k1_fx8010_control_gpr __user *)controls;
emu->support_tlv = 1; /* support TLV */
err = snd_emu10k1_icode_poke(emu, icode);
err = snd_emu10k1_icode_poke(emu, icode, true);
emu->support_tlv = 0; /* clear again */
snd_leave_user(seg);
if (err >= 0)
err = snd_emu10k1_ipcm_poke(emu, ipcm);
__err:
......@@ -2537,7 +2556,7 @@ static int snd_emu10k1_fx8010_ioctl(struct snd_hwdep * hw, struct file *file, un
icode = memdup_user(argp, sizeof(*icode));
if (IS_ERR(icode))
return PTR_ERR(icode);
res = snd_emu10k1_icode_poke(emu, icode);
res = snd_emu10k1_icode_poke(emu, icode, false);
kfree(icode);
return res;
case SNDRV_EMU10K1_IOCTL_CODE_PEEK:
......
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