mirror of https://gitee.com/openkylin/linux.git
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: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai
parent
3ac8226fc8
commit
d42fe63d58
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@ -310,21 +310,6 @@ static const u32 onoff_table[2] = {
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0x00000000, 0x00000001
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};
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/*
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*/
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static inline mm_segment_t snd_enter_user(void)
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{
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mm_segment_t fs = get_fs();
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set_fs(get_ds());
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return fs;
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}
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static inline void snd_leave_user(mm_segment_t fs)
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{
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set_fs(fs);
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}
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/*
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* controls
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*/
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@ -538,7 +523,8 @@ unsigned int snd_emu10k1_efx_read(struct snd_emu10k1 *emu, unsigned int pc)
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}
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static int snd_emu10k1_gpr_poke(struct snd_emu10k1 *emu,
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struct snd_emu10k1_fx8010_code *icode)
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struct snd_emu10k1_fx8010_code *icode,
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bool in_kernel)
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{
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int gpr;
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u32 val;
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@ -546,7 +532,9 @@ static int snd_emu10k1_gpr_poke(struct snd_emu10k1 *emu,
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for (gpr = 0; gpr < (emu->audigy ? 0x200 : 0x100); gpr++) {
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if (!test_bit(gpr, icode->gpr_valid))
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continue;
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if (get_user(val, &icode->gpr_map[gpr]))
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if (in_kernel)
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val = *(u32 *)&icode->gpr_map[gpr];
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else if (get_user(val, &icode->gpr_map[gpr]))
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return -EFAULT;
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snd_emu10k1_ptr_write(emu, emu->gpr_base + gpr, 0, val);
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}
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@ -569,7 +557,8 @@ static int snd_emu10k1_gpr_peek(struct snd_emu10k1 *emu,
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}
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static int snd_emu10k1_tram_poke(struct snd_emu10k1 *emu,
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struct snd_emu10k1_fx8010_code *icode)
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struct snd_emu10k1_fx8010_code *icode,
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bool in_kernel)
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{
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int tram;
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u32 addr, val;
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@ -577,9 +566,14 @@ static int snd_emu10k1_tram_poke(struct snd_emu10k1 *emu,
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for (tram = 0; tram < (emu->audigy ? 0x100 : 0xa0); tram++) {
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if (!test_bit(tram, icode->tram_valid))
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continue;
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if (get_user(val, &icode->tram_data_map[tram]) ||
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get_user(addr, &icode->tram_addr_map[tram]))
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return -EFAULT;
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if (in_kernel) {
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val = *(u32 *)&icode->tram_data_map[tram];
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addr = *(u32 *)&icode->tram_addr_map[tram];
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} else {
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if (get_user(val, &icode->tram_data_map[tram]) ||
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get_user(addr, &icode->tram_addr_map[tram]))
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return -EFAULT;
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}
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snd_emu10k1_ptr_write(emu, TANKMEMDATAREGBASE + tram, 0, val);
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if (!emu->audigy) {
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snd_emu10k1_ptr_write(emu, TANKMEMADDRREGBASE + tram, 0, addr);
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@ -615,16 +609,22 @@ static int snd_emu10k1_tram_peek(struct snd_emu10k1 *emu,
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}
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static int snd_emu10k1_code_poke(struct snd_emu10k1 *emu,
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struct snd_emu10k1_fx8010_code *icode)
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struct snd_emu10k1_fx8010_code *icode,
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bool in_kernel)
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{
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u32 pc, lo, hi;
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for (pc = 0; pc < (emu->audigy ? 2*1024 : 2*512); pc += 2) {
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if (!test_bit(pc / 2, icode->code_valid))
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continue;
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if (get_user(lo, &icode->code[pc + 0]) ||
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get_user(hi, &icode->code[pc + 1]))
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return -EFAULT;
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if (in_kernel) {
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lo = *(u32 *)&icode->code[pc + 0];
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hi = *(u32 *)&icode->code[pc + 1];
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} else {
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if (get_user(lo, &icode->code[pc + 0]) ||
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get_user(hi, &icode->code[pc + 1]))
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return -EFAULT;
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}
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snd_emu10k1_efx_write(emu, pc + 0, lo);
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snd_emu10k1_efx_write(emu, pc + 1, hi);
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}
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@ -665,14 +665,16 @@ snd_emu10k1_look_for_ctl(struct snd_emu10k1 *emu, struct snd_ctl_elem_id *id)
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#define MAX_TLV_SIZE 256
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static unsigned int *copy_tlv(const unsigned int __user *_tlv)
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static unsigned int *copy_tlv(const unsigned int __user *_tlv, bool in_kernel)
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{
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unsigned int data[2];
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unsigned int *tlv;
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if (!_tlv)
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return NULL;
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if (copy_from_user(data, _tlv, sizeof(data)))
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if (in_kernel)
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memcpy(data, (void *)_tlv, sizeof(data));
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else if (copy_from_user(data, _tlv, sizeof(data)))
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return NULL;
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if (data[1] >= MAX_TLV_SIZE)
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return NULL;
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@ -680,7 +682,9 @@ static unsigned int *copy_tlv(const unsigned int __user *_tlv)
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if (!tlv)
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return NULL;
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memcpy(tlv, data, sizeof(data));
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if (copy_from_user(tlv + 2, _tlv + 2, data[1])) {
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if (in_kernel) {
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memcpy(tlv + 2, (void *)(_tlv + 2), data[1]);
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} else if (copy_from_user(tlv + 2, _tlv + 2, data[1])) {
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kfree(tlv);
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return NULL;
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}
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@ -690,7 +694,7 @@ static unsigned int *copy_tlv(const unsigned int __user *_tlv)
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static int copy_gctl(struct snd_emu10k1 *emu,
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struct snd_emu10k1_fx8010_control_gpr *gctl,
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struct snd_emu10k1_fx8010_control_gpr __user *_gctl,
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int idx)
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int idx, bool in_kernel)
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{
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struct snd_emu10k1_fx8010_control_old_gpr __user *octl;
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@ -718,7 +722,8 @@ static int copy_gctl_to_user(struct snd_emu10k1 *emu,
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}
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static int snd_emu10k1_verify_controls(struct snd_emu10k1 *emu,
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struct snd_emu10k1_fx8010_code *icode)
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struct snd_emu10k1_fx8010_code *icode,
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bool in_kernel)
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{
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unsigned int i;
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struct snd_ctl_elem_id __user *_id;
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@ -728,7 +733,9 @@ static int snd_emu10k1_verify_controls(struct snd_emu10k1 *emu,
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for (i = 0, _id = icode->gpr_del_controls;
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i < icode->gpr_del_control_count; i++, _id++) {
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if (copy_from_user(&id, _id, sizeof(id)))
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if (in_kernel)
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id = *(struct snd_ctl_elem_id *)_id;
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else if (copy_from_user(&id, _id, sizeof(id)))
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return -EFAULT;
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if (snd_emu10k1_look_for_ctl(emu, &id) == NULL)
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return -ENOENT;
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@ -738,7 +745,8 @@ static int snd_emu10k1_verify_controls(struct snd_emu10k1 *emu,
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return -ENOMEM;
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err = 0;
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for (i = 0; i < icode->gpr_add_control_count; i++) {
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if (copy_gctl(emu, gctl, icode->gpr_add_controls, i)) {
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if (copy_gctl(emu, gctl, icode->gpr_add_controls, i,
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in_kernel)) {
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err = -EFAULT;
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goto __error;
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}
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@ -759,7 +767,8 @@ static int snd_emu10k1_verify_controls(struct snd_emu10k1 *emu,
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}
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for (i = 0; i < icode->gpr_list_control_count; i++) {
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/* FIXME: we need to check the WRITE access */
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if (copy_gctl(emu, gctl, icode->gpr_list_controls, i)) {
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if (copy_gctl(emu, gctl, icode->gpr_list_controls, i,
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in_kernel)) {
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err = -EFAULT;
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goto __error;
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}
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@ -781,7 +790,8 @@ static void snd_emu10k1_ctl_private_free(struct snd_kcontrol *kctl)
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}
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static int snd_emu10k1_add_controls(struct snd_emu10k1 *emu,
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struct snd_emu10k1_fx8010_code *icode)
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struct snd_emu10k1_fx8010_code *icode,
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bool in_kernel)
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{
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unsigned int i, j;
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struct snd_emu10k1_fx8010_control_gpr *gctl;
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@ -800,7 +810,8 @@ static int snd_emu10k1_add_controls(struct snd_emu10k1 *emu,
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}
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for (i = 0; i < icode->gpr_add_control_count; i++) {
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if (copy_gctl(emu, gctl, icode->gpr_add_controls, i)) {
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if (copy_gctl(emu, gctl, icode->gpr_add_controls, i,
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in_kernel)) {
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err = -EFAULT;
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goto __error;
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}
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@ -821,7 +832,7 @@ static int snd_emu10k1_add_controls(struct snd_emu10k1 *emu,
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knew.device = gctl->id.device;
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knew.subdevice = gctl->id.subdevice;
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knew.info = snd_emu10k1_gpr_ctl_info;
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knew.tlv.p = copy_tlv(gctl->tlv);
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knew.tlv.p = copy_tlv(gctl->tlv, in_kernel);
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if (knew.tlv.p)
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knew.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
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SNDRV_CTL_ELEM_ACCESS_TLV_READ;
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@ -873,7 +884,8 @@ static int snd_emu10k1_add_controls(struct snd_emu10k1 *emu,
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}
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static int snd_emu10k1_del_controls(struct snd_emu10k1 *emu,
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struct snd_emu10k1_fx8010_code *icode)
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struct snd_emu10k1_fx8010_code *icode,
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bool in_kernel)
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{
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unsigned int i;
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struct snd_ctl_elem_id id;
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@ -883,7 +895,9 @@ static int snd_emu10k1_del_controls(struct snd_emu10k1 *emu,
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for (i = 0, _id = icode->gpr_del_controls;
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i < icode->gpr_del_control_count; i++, _id++) {
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if (copy_from_user(&id, _id, sizeof(id)))
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if (in_kernel)
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id = *(struct snd_ctl_elem_id *)_id;
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else if (copy_from_user(&id, _id, sizeof(id)))
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return -EFAULT;
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down_write(&card->controls_rwsem);
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ctl = snd_emu10k1_look_for_ctl(emu, &id);
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@ -941,12 +955,14 @@ static int snd_emu10k1_list_controls(struct snd_emu10k1 *emu,
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}
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static int snd_emu10k1_icode_poke(struct snd_emu10k1 *emu,
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struct snd_emu10k1_fx8010_code *icode)
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struct snd_emu10k1_fx8010_code *icode,
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bool in_kernel)
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{
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int err = 0;
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mutex_lock(&emu->fx8010.lock);
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if ((err = snd_emu10k1_verify_controls(emu, icode)) < 0)
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err = snd_emu10k1_verify_controls(emu, icode, in_kernel);
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if (err < 0)
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goto __error;
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strlcpy(emu->fx8010.name, icode->name, sizeof(emu->fx8010.name));
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/* stop FX processor - this may be dangerous, but it's better to miss
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@ -956,11 +972,20 @@ static int snd_emu10k1_icode_poke(struct snd_emu10k1 *emu,
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else
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snd_emu10k1_ptr_write(emu, DBG, 0, emu->fx8010.dbg | EMU10K1_DBG_SINGLE_STEP);
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/* ok, do the main job */
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if ((err = snd_emu10k1_del_controls(emu, icode)) < 0 ||
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(err = snd_emu10k1_gpr_poke(emu, icode)) < 0 ||
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(err = snd_emu10k1_tram_poke(emu, icode)) < 0 ||
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(err = snd_emu10k1_code_poke(emu, icode)) < 0 ||
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(err = snd_emu10k1_add_controls(emu, icode)) < 0)
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err = snd_emu10k1_del_controls(emu, icode, in_kernel);
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if (err < 0)
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goto __error;
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err = snd_emu10k1_gpr_poke(emu, icode, in_kernel);
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if (err < 0)
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goto __error;
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err = snd_emu10k1_tram_poke(emu, icode, in_kernel);
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if (err < 0)
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goto __error;
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err = snd_emu10k1_code_poke(emu, icode, in_kernel);
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if (err < 0)
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goto __error;
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err = snd_emu10k1_add_controls(emu, icode, in_kernel);
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if (err < 0)
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goto __error;
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/* start FX processor when the DSP code is updated */
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if (emu->audigy)
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@ -1179,7 +1204,6 @@ static int _snd_emu10k1_audigy_init_efx(struct snd_emu10k1 *emu)
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struct snd_emu10k1_fx8010_code *icode = NULL;
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struct snd_emu10k1_fx8010_control_gpr *controls = NULL, *ctl;
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u32 *gpr_map;
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mm_segment_t seg;
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err = -ENOMEM;
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icode = kzalloc(sizeof(*icode), GFP_KERNEL);
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@ -1739,13 +1763,11 @@ A_OP(icode, &ptr, iMAC0, A_GPR(var), A_GPR(var), A_GPR(vol), A_EXTIN(input))
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while (ptr < 0x400)
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A_OP(icode, &ptr, 0x0f, 0xc0, 0xc0, 0xcf, 0xc0);
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seg = snd_enter_user();
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icode->gpr_add_control_count = nctl;
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icode->gpr_add_controls = (struct snd_emu10k1_fx8010_control_gpr __user *)controls;
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emu->support_tlv = 1; /* support TLV */
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err = snd_emu10k1_icode_poke(emu, icode);
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err = snd_emu10k1_icode_poke(emu, icode, true);
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emu->support_tlv = 0; /* clear again */
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snd_leave_user(seg);
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__err:
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kfree(controls);
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@ -1817,7 +1839,6 @@ static int _snd_emu10k1_init_efx(struct snd_emu10k1 *emu)
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struct snd_emu10k1_fx8010_pcm_rec *ipcm = NULL;
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struct snd_emu10k1_fx8010_control_gpr *controls = NULL, *ctl;
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u32 *gpr_map;
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mm_segment_t seg;
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err = -ENOMEM;
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icode = kzalloc(sizeof(*icode), GFP_KERNEL);
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@ -2368,13 +2389,11 @@ static int _snd_emu10k1_init_efx(struct snd_emu10k1 *emu)
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if ((err = snd_emu10k1_fx8010_tram_setup(emu, ipcm->buffer_size)) < 0)
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goto __err;
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seg = snd_enter_user();
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icode->gpr_add_control_count = i;
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icode->gpr_add_controls = (struct snd_emu10k1_fx8010_control_gpr __user *)controls;
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emu->support_tlv = 1; /* support TLV */
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err = snd_emu10k1_icode_poke(emu, icode);
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err = snd_emu10k1_icode_poke(emu, icode, true);
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emu->support_tlv = 0; /* clear again */
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snd_leave_user(seg);
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if (err >= 0)
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err = snd_emu10k1_ipcm_poke(emu, ipcm);
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__err:
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@ -2537,7 +2556,7 @@ static int snd_emu10k1_fx8010_ioctl(struct snd_hwdep * hw, struct file *file, un
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icode = memdup_user(argp, sizeof(*icode));
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if (IS_ERR(icode))
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return PTR_ERR(icode);
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res = snd_emu10k1_icode_poke(emu, icode);
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res = snd_emu10k1_icode_poke(emu, icode, false);
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kfree(icode);
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return res;
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case SNDRV_EMU10K1_IOCTL_CODE_PEEK:
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