From: Takashi Iwai Date: Wed, 10 May 2017 15:11:34 +0000 (+0200) Subject: ALSA: emu10k1: Get rid of set_fs() usage X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d42fe63d58392f29e82e17c02f10e8cd3f45f17f;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.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 Signed-off-by: Takashi Iwai --- diff --git a/sound/pci/emu10k1/emufx.c b/sound/pci/emu10k1/emufx.c index 56fc47bd6dba..dc585959ca32 100644 --- a/sound/pci/emu10k1/emufx.c +++ b/sound/pci/emu10k1/emufx.c @@ -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: