In my previous change to this driver, I was not aware, that dvb_usb_device_init calls the frontend_attach routine which needs a transfer buffer. So we can not setup anything private in the probe routine beforehand but have to allocate when needed. This means also that we cannot use a private buffer mutex to serialize that buffer but instead need to use the dvb_usb_device's usb_mutex.
Fixes: https://bugzilla.novell.com/show_bug.cgi?id=709440 Tested-by: Markus Stephan <markus_step...@freenet.de> Signed-off-by: Florian Mickler <flor...@mickler.org> --- So, someone who could test that driver found me after all. I renamed the functions to get rid of that ugly and pointless _unlocked suffix I deliriously added earlier. Markus tested this patch modulo function renaming. I am so shure that this version will still work for him, that I already added his Tested-by. *fingerscrossed* drivers/media/dvb/dvb-usb/vp702x-fe.c | 92 +++++++++++---- drivers/media/dvb/dvb-usb/vp702x.c | 211 ++++++++++++++++++--------------- drivers/media/dvb/dvb-usb/vp702x.h | 13 ++- 3 files changed, 193 insertions(+), 123 deletions(-) diff --git a/drivers/media/dvb/dvb-usb/vp702x-fe.c b/drivers/media/dvb/dvb-usb/vp702x-fe.c index 2bb8d4c..ad16455 100644 --- a/drivers/media/dvb/dvb-usb/vp702x-fe.c +++ b/drivers/media/dvb/dvb-usb/vp702x-fe.c @@ -43,21 +43,30 @@ static int vp702x_fe_refresh_state(struct vp702x_fe_state *st) { struct vp702x_device_state *dst = st->d->priv; u8 *buf; + int ret; if (time_after(jiffies, st->next_status_check)) { - mutex_lock(&dst->buf_mutex); - buf = dst->buf; + ret = mutex_lock_interruptible(&st->d->usb_mutex); + if (ret < 0) + return ret; + + ret = vp702x_buffer_setup(dst, &buf, 10); + if (ret) + goto unlock; vp702x_usb_in_op(st->d, READ_STATUS, 0, 0, buf, 10); st->lock = buf[4]; - vp702x_usb_in_op(st->d, READ_TUNER_REG_REQ, 0x11, 0, buf, 1); + vp702x_usb_in_op(st->d, READ_TUNER_REG_REQ, 0x11, 0, + buf, 1); st->snr = buf[0]; - vp702x_usb_in_op(st->d, READ_TUNER_REG_REQ, 0x15, 0, buf, 1); + vp702x_usb_in_op(st->d, READ_TUNER_REG_REQ, 0x15, 0, + buf, 1); st->sig = buf[0]; - mutex_unlock(&dst->buf_mutex); +unlock: + mutex_unlock(&st->d->usb_mutex); st->next_status_check = jiffies + (st->status_check_interval*HZ)/1000; } return 0; @@ -145,11 +154,15 @@ static int vp702x_fe_set_frontend(struct dvb_frontend* fe, /* u16 frequencyRef[16] = { 2, 4, 8, 16, 32, 64, 128, 256, 24, 5, 10, 20, 40, 80, 160, 320 }; */ u64 sr; u8 *cmd; + int ret; - mutex_lock(&dst->buf_mutex); + ret = mutex_lock_interruptible(&st->d->usb_mutex); + if (ret < 0) + return ret; - cmd = dst->buf; - memset(cmd, 0, 10); + ret = vp702x_buffer_setup(dst, &cmd, 10); + if (ret) + goto unlock; cmd[0] = (freq >> 8) & 0x7f; cmd[1] = freq & 0xff; @@ -191,17 +204,25 @@ static int vp702x_fe_set_frontend(struct dvb_frontend* fe, deb_fe("tuning failed.\n"); else deb_fe("tuning succeeded.\n"); + ret = 0; - mutex_unlock(&dst->buf_mutex); - - return 0; +unlock: + mutex_unlock(&st->d->usb_mutex); + return ret; } static int vp702x_fe_init(struct dvb_frontend *fe) { struct vp702x_fe_state *st = fe->demodulator_priv; + int ret; + deb_fe("%s\n",__func__); + ret = mutex_lock_interruptible(&st->d->usb_mutex); + if (ret < 0) + return ret; vp702x_usb_in_op(st->d, RESET_TUNER, 0, 0, NULL, 0); + + mutex_unlock(&st->d->usb_mutex); return 0; } @@ -224,15 +245,21 @@ static int vp702x_fe_send_diseqc_msg (struct dvb_frontend* fe, u8 *cmd; struct vp702x_fe_state *st = fe->demodulator_priv; struct vp702x_device_state *dst = st->d->priv; + int ret; deb_fe("%s\n",__func__); if (m->msg_len > 4) return -EINVAL; - mutex_lock(&dst->buf_mutex); + ret = mutex_lock_interruptible(&st->d->usb_mutex); + if (ret < 0) + return ret; + + ret = vp702x_buffer_setup(dst, &cmd, 10); + if (ret) + goto unlock; - cmd = dst->buf; cmd[1] = SET_DISEQC_CMD; cmd[2] = m->msg_len; memcpy(&cmd[3], m->msg, m->msg_len); @@ -244,10 +271,12 @@ static int vp702x_fe_send_diseqc_msg (struct dvb_frontend* fe, deb_fe("diseqc cmd failed.\n"); else deb_fe("diseqc cmd succeeded.\n"); + ret = 0; - mutex_unlock(&dst->buf_mutex); +unlock: + mutex_unlock(&st->d->usb_mutex); - return 0; + return ret; } static int vp702x_fe_send_diseqc_burst (struct dvb_frontend* fe, fe_sec_mini_cmd_t burst) @@ -261,6 +290,7 @@ static int vp702x_fe_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone) struct vp702x_fe_state *st = fe->demodulator_priv; struct vp702x_device_state *dst = st->d->priv; u8 *buf; + int ret; deb_fe("%s\n",__func__); @@ -273,9 +303,14 @@ static int vp702x_fe_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone) st->lnb_buf[7] = vp702x_chksum(st->lnb_buf, 0, 7); - mutex_lock(&dst->buf_mutex); + ret = mutex_lock_interruptible(&st->d->usb_mutex); + if (ret < 0) + return ret; + + ret = vp702x_buffer_setup(dst, &buf, 10); + if (ret) + goto unlock; - buf = dst->buf; memcpy(buf, st->lnb_buf, 8); vp702x_usb_inout_op(st->d, buf, 8, buf, 10, 100); @@ -283,10 +318,11 @@ static int vp702x_fe_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone) deb_fe("set_tone cmd failed.\n"); else deb_fe("set_tone cmd succeeded.\n"); + ret = 0; +unlock: + mutex_unlock(&st->d->usb_mutex); - mutex_unlock(&dst->buf_mutex); - - return 0; + return ret; } static int vp702x_fe_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t @@ -295,6 +331,7 @@ static int vp702x_fe_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t struct vp702x_fe_state *st = fe->demodulator_priv; struct vp702x_device_state *dst = st->d->priv; u8 *buf; + int ret; deb_fe("%s\n",__func__); st->voltage = voltage; @@ -306,9 +343,13 @@ static int vp702x_fe_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t st->lnb_buf[7] = vp702x_chksum(st->lnb_buf, 0, 7); - mutex_lock(&dst->buf_mutex); + ret = mutex_lock_interruptible(&st->d->usb_mutex); + if (ret < 0) + return ret; + ret = vp702x_buffer_setup(dst, &buf, 10); + if (ret) + goto unlock; - buf = dst->buf; memcpy(buf, st->lnb_buf, 8); vp702x_usb_inout_op(st->d, buf, 8, buf, 10, 100); @@ -316,9 +357,10 @@ static int vp702x_fe_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t deb_fe("set_voltage cmd failed.\n"); else deb_fe("set_voltage cmd succeeded.\n"); - - mutex_unlock(&dst->buf_mutex); - return 0; + ret = 0; +unlock: + mutex_unlock(&st->d->usb_mutex); + return ret; } static void vp702x_fe_release(struct dvb_frontend* fe) diff --git a/drivers/media/dvb/dvb-usb/vp702x.c b/drivers/media/dvb/dvb-usb/vp702x.c index 54355f8..1ff2296 100644 --- a/drivers/media/dvb/dvb-usb/vp702x.c +++ b/drivers/media/dvb/dvb-usb/vp702x.c @@ -30,7 +30,7 @@ struct vp702x_adapter_state { u8 pid_filter_state; }; -static int vp702x_usb_in_op_unlocked(struct dvb_usb_device *d, u8 req, +int vp702x_usb_in_op(struct dvb_usb_device *d, u8 req, u16 value, u16 index, u8 *b, int blen) { int ret; @@ -55,20 +55,8 @@ static int vp702x_usb_in_op_unlocked(struct dvb_usb_device *d, u8 req, return ret; } -int vp702x_usb_in_op(struct dvb_usb_device *d, u8 req, u16 value, - u16 index, u8 *b, int blen) -{ - int ret; - - mutex_lock(&d->usb_mutex); - ret = vp702x_usb_in_op_unlocked(d, req, value, index, b, blen); - mutex_unlock(&d->usb_mutex); - - return ret; -} - -int vp702x_usb_out_op_unlocked(struct dvb_usb_device *d, u8 req, u16 value, - u16 index, u8 *b, int blen) +static int vp702x_usb_out_op(struct dvb_usb_device *d, u8 req, + u16 value, u16 index, u8 *b, int blen) { int ret; deb_xfer("out: req. %02x, val: %04x, ind: %04x, buffer: ",req,value,index); @@ -86,33 +74,51 @@ int vp702x_usb_out_op_unlocked(struct dvb_usb_device *d, u8 req, u16 value, return 0; } -int vp702x_usb_out_op(struct dvb_usb_device *d, u8 req, u16 value, - u16 index, u8 *b, int blen) +static int vp702x_usb_out_op2(struct dvb_usb_device *d, u8 req, u16 val, u16 idx) { int ret; + ret = mutex_lock_interruptible(&d->usb_mutex); + if (ret < 0) + return ret; - mutex_lock(&d->usb_mutex); - ret = vp702x_usb_out_op_unlocked(d, req, value, index, b, blen); - mutex_unlock(&d->usb_mutex); + vp702x_usb_out_op(d, req, val, idx, NULL, 0); - return ret; + mutex_unlock(&d->usb_mutex); + return 0; } -int vp702x_usb_inout_op(struct dvb_usb_device *d, u8 *o, int olen, u8 *i, int ilen, int msec) +int vp702x_usb_inout_op(struct dvb_usb_device *d, u8 *o, int olen, + u8 *i, int ilen, int msec) { int ret; - if ((ret = mutex_lock_interruptible(&d->usb_mutex))) - return ret; - - ret = vp702x_usb_out_op_unlocked(d, REQUEST_OUT, 0, 0, o, olen); + ret = vp702x_usb_out_op(d, REQUEST_OUT, 0, 0, o, olen); msleep(msec); - ret = vp702x_usb_in_op_unlocked(d, REQUEST_IN, 0, 0, i, ilen); + ret = vp702x_usb_in_op(d, REQUEST_IN, 0, 0, i, ilen); - mutex_unlock(&d->usb_mutex); return ret; } +/* + * any buffer access has to be protected by dvb_usb_device.usb_mutex + */ +int vp702x_buffer_setup(struct vp702x_device_state *st, u8 **bufp, + int buflen) +{ + if (buflen > st->buf_len) { + *bufp = kmalloc(buflen, GFP_KERNEL); + if (!*bufp) + return -ENOMEM; + info("successfully reallocated a bigger buffer"); + kfree(st->buf); + st->buf = *bufp; + st->buf_len = buflen; + } else { + *bufp = st->buf; + } + return 0; +} + static int vp702x_usb_inout_cmd(struct dvb_usb_device *d, u8 cmd, u8 *o, int olen, u8 *i, int ilen, int msec) { @@ -121,23 +127,13 @@ static int vp702x_usb_inout_cmd(struct dvb_usb_device *d, u8 cmd, u8 *o, u8 *buf; int buflen = max(olen + 2, ilen + 1); - ret = mutex_lock_interruptible(&st->buf_mutex); + ret = mutex_lock_interruptible(&d->usb_mutex); if (ret < 0) return ret; - if (buflen > st->buf_len) { - buf = kmalloc(buflen, GFP_KERNEL); - if (!buf) { - mutex_unlock(&st->buf_mutex); - return -ENOMEM; - } - info("successfully reallocated a bigger buffer"); - kfree(st->buf); - st->buf = buf; - st->buf_len = buflen; - } else { - buf = st->buf; - } + ret = vp702x_buffer_setup(st, &buf, buflen); + if (ret) + goto unlock; buf[0] = 0x00; buf[1] = cmd; @@ -147,8 +143,8 @@ static int vp702x_usb_inout_cmd(struct dvb_usb_device *d, u8 cmd, u8 *o, if (ret == 0) memcpy(i, &buf[1], ilen); - mutex_unlock(&st->buf_mutex); - +unlock: + mutex_unlock(&d->usb_mutex); return ret; } @@ -158,14 +154,19 @@ static int vp702x_set_pld_mode(struct dvb_usb_adapter *adap, u8 bypass) struct vp702x_device_state *st = adap->dev->priv; u8 *buf; - mutex_lock(&st->buf_mutex); + ret = mutex_lock_interruptible(&adap->dev->usb_mutex); + if (ret < 0) + return ret; - buf = st->buf; - memset(buf, 0, 16); + ret = vp702x_buffer_setup(st, &buf, 16); + if (ret) + goto unlock; + memset(buf, 0, 16); ret = vp702x_usb_in_op(adap->dev, 0xe0, (bypass << 8) | 0x0e, 0, buf, 16); - mutex_unlock(&st->buf_mutex); +unlock: + mutex_unlock(&adap->dev->usb_mutex); return ret; } @@ -175,15 +176,20 @@ static int vp702x_set_pld_state(struct dvb_usb_adapter *adap, u8 state) struct vp702x_device_state *st = adap->dev->priv; u8 *buf; - mutex_lock(&st->buf_mutex); + ret = mutex_lock_interruptible(&adap->dev->usb_mutex); + if (ret < 0) + return ret; + + ret = vp702x_buffer_setup(st, &buf, 16); + if (ret) + goto unlock; - buf = st->buf; memset(buf, 0, 16); ret = vp702x_usb_in_op(adap->dev, 0xe0, (state << 8) | 0x0f, 0, buf, 16); - mutex_unlock(&st->buf_mutex); - +unlock: + mutex_unlock(&adap->dev->usb_mutex); return ret; } @@ -192,6 +198,7 @@ static int vp702x_set_pid(struct dvb_usb_adapter *adap, u16 pid, u8 id, int onof struct vp702x_adapter_state *st = adap->priv; struct vp702x_device_state *dst = adap->dev->priv; u8 *buf; + int ret; if (onoff) st->pid_filter_state |= (1 << id); @@ -204,16 +211,23 @@ static int vp702x_set_pid(struct dvb_usb_adapter *adap, u16 pid, u8 id, int onof vp702x_set_pld_state(adap, st->pid_filter_state); - mutex_lock(&dst->buf_mutex); + ret = mutex_lock_interruptible(&adap->dev->usb_mutex); + if (ret < 0) + return ret; - buf = dst->buf; - memset(buf, 0, 16); - vp702x_usb_in_op(adap->dev, 0xe0, (((pid >> 8) & 0xff) << 8) | (id), 0, buf, 16); - vp702x_usb_in_op(adap->dev, 0xe0, (((pid ) & 0xff) << 8) | (id+1), 0, buf, 16); + ret = vp702x_buffer_setup(dst, &buf, 16); + if (ret) + goto unlock; - mutex_unlock(&dst->buf_mutex); + memset(buf, 0, 16); + vp702x_usb_in_op(adap->dev, 0xe0, + (((pid >> 8) & 0xff) << 8) | (id), 0, buf, 16); + vp702x_usb_in_op(adap->dev, 0xe0, + (((pid ) & 0xff) << 8) | (id+1), 0, buf, 16); - return 0; +unlock: + mutex_unlock(&adap->dev->usb_mutex); + return ret; } @@ -223,6 +237,7 @@ static int vp702x_init_pid_filter(struct dvb_usb_adapter *adap) struct vp702x_device_state *dst = adap->dev->priv; int i; u8 *b; + int ret; st->pid_filter_count = 8; st->pid_filter_can_bypass = 1; @@ -233,16 +248,23 @@ static int vp702x_init_pid_filter(struct dvb_usb_adapter *adap) for (i = 0; i < st->pid_filter_count; i++) vp702x_set_pid(adap, 0xffff, i, 1); - mutex_lock(&dst->buf_mutex); - b = dst->buf; + ret = mutex_lock_interruptible(&adap->dev->usb_mutex); + if (ret < 0) + return ret; + + ret = vp702x_buffer_setup(dst, &b, 10); + if (ret) + goto unlock; + memset(b, 0, 10); vp702x_usb_in_op(adap->dev, 0xb5, 3, 0, b, 10); vp702x_usb_in_op(adap->dev, 0xb5, 0, 0, b, 10); vp702x_usb_in_op(adap->dev, 0xb5, 1, 0, b, 10); - mutex_unlock(&dst->buf_mutex); /*vp702x_set_pld_mode(d, 0); // filter */ - return 0; +unlock: + mutex_unlock(&adap->dev->usb_mutex); + return ret; } static int vp702x_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff) @@ -261,6 +283,7 @@ static int vp702x_rc_query(struct dvb_usb_device *d, u32 *event, int *state) { u8 *key; int i; + int ret; /* remove the following return to enabled remote querying */ return 0; @@ -269,7 +292,11 @@ static int vp702x_rc_query(struct dvb_usb_device *d, u32 *event, int *state) if (!key) return -ENOMEM; - vp702x_usb_in_op(d,READ_REMOTE_REQ,0,0,key,10); + ret = mutex_lock_interruptible(&d->usb_mutex); + if (ret < 0) + return ret; + vp702x_usb_in_op(d, READ_REMOTE_REQ, 0, 0, key, 10); + mutex_unlock(&d->usb_mutex); deb_rc("remote query key: %x %d\n",key[1],key[1]); @@ -294,22 +321,32 @@ static int vp702x_read_mac_addr(struct dvb_usb_device *d,u8 mac[6]) { u8 i, *buf; struct vp702x_device_state *st = d->priv; + int ret; + + ret = mutex_lock_interruptible(&d->usb_mutex); + if (ret < 0) + return ret; + + ret = vp702x_buffer_setup(st, &buf, 6); + if (ret) + goto unlock; - mutex_lock(&st->buf_mutex); - buf = st->buf; for (i = 6; i < 12; i++) - vp702x_usb_in_op(d, READ_EEPROM_REQ, i, 1, &buf[i - 6], 1); + vp702x_usb_in_op(d, READ_EEPROM_REQ, i, 1, + &buf[i - 6], 1); memcpy(mac, buf, 6); - mutex_unlock(&st->buf_mutex); - return 0; + +unlock: + mutex_unlock(&d->usb_mutex); + return ret; } static int vp702x_frontend_attach(struct dvb_usb_adapter *adap) { u8 buf[10] = { 0 }; - vp702x_usb_out_op(adap->dev, SET_TUNER_POWER_REQ, 0, 7, NULL, 0); + vp702x_usb_out_op2(adap->dev, SET_TUNER_POWER_REQ, 0, 7); if (vp702x_usb_inout_cmd(adap->dev, GET_SYSTEM_STRING, NULL, 0, buf, 10, 10)) @@ -321,7 +358,8 @@ static int vp702x_frontend_attach(struct dvb_usb_adapter *adap) vp702x_init_pid_filter(adap); adap->fe = vp702x_fe_attach(adap->dev); - vp702x_usb_out_op(adap->dev, SET_TUNER_POWER_REQ, 1, 7, NULL, 0); + + vp702x_usb_out_op2(adap->dev, SET_TUNER_POWER_REQ, 1, 7); return 0; } @@ -331,37 +369,20 @@ static struct dvb_usb_device_properties vp702x_properties; static int vp702x_usb_probe(struct usb_interface *intf, const struct usb_device_id *id) { - struct dvb_usb_device *d; - struct vp702x_device_state *st; - int ret; - - ret = dvb_usb_device_init(intf, &vp702x_properties, - THIS_MODULE, &d, adapter_nr); - if (ret) - goto out; - - st = d->priv; - st->buf_len = 16; - st->buf = kmalloc(st->buf_len, GFP_KERNEL); - if (!st->buf) { - ret = -ENOMEM; - dvb_usb_device_exit(intf); - goto out; - } - mutex_init(&st->buf_mutex); - -out: - return ret; - + return dvb_usb_device_init(intf, &vp702x_properties, + THIS_MODULE, NULL, adapter_nr); } static void vp702x_usb_disconnect(struct usb_interface *intf) { struct dvb_usb_device *d = usb_get_intfdata(intf); struct vp702x_device_state *st = d->priv; - mutex_lock(&st->buf_mutex); + + mutex_lock(&d->usb_mutex); + st->buf_len = 0; kfree(st->buf); - mutex_unlock(&st->buf_mutex); + mutex_unlock(&d->usb_mutex); + dvb_usb_device_exit(intf); } diff --git a/drivers/media/dvb/dvb-usb/vp702x.h b/drivers/media/dvb/dvb-usb/vp702x.h index 20b9005..f7a39d6 100644 --- a/drivers/media/dvb/dvb-usb/vp702x.h +++ b/drivers/media/dvb/dvb-usb/vp702x.h @@ -99,7 +99,10 @@ extern int dvb_usb_vp702x_debug; /* IN i: 0, v: 0, no extra buffer */ struct vp702x_device_state { - struct mutex buf_mutex; + /* + * access to these has to be protected by + * dvb_usb_device.usb_mutex + */ int buf_len; u8 *buf; }; @@ -107,7 +110,11 @@ struct vp702x_device_state { extern struct dvb_frontend * vp702x_fe_attach(struct dvb_usb_device *d); -extern int vp702x_usb_inout_op(struct dvb_usb_device *d, u8 *o, int olen, u8 *i, int ilen, int msec); -extern int vp702x_usb_in_op(struct dvb_usb_device *d, u8 req, u16 value, u16 index, u8 *b, int blen); +extern int vp702x_usb_inout_op(struct dvb_usb_device *d, u8 *o, int olen, u8 *i, + int ilen, int msec); +extern int vp702x_usb_in_op(struct dvb_usb_device *d, u8 req, + u16 value, u16 index, u8 *b, int blen); +extern int vp702x_buffer_setup(struct vp702x_device_state *st, u8 **buf, + int len); #endif -- 1.7.6 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
