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media: dvb_ca_en50221: Avoid assignments in ifs 

Fixed all:
  ERROR: do not use assignment in if condition

Fixed also "-strict" checks in this patch:
- Changed "if (ret != 0)" to "if (ret)".
- Camel case variables have been converted to kernel_case.
- Comparison to NULL written as "!<var>".
- No space is necessary after a cast.

Signed-off-by: Jasmin Jessich <jasmin@anw.at>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Jasmin Jessich 2017-07-15 20:43:06 -04:00 committed by Mauro Carvalho Chehab
parent a1ca23d10e
commit bacba9e540
1 changed files with 100 additions and 66 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

166
drivers/media/dvb-core/dvb_ca_en50221.c
View File

@ -349,14 +349,18 @@ static int dvb_ca_en50221_link_init(struct dvb_ca_private *ca, int slot)
ca->slot_info[slot].link_buf_size = 2; ca->slot_info[slot].link_buf_size = 2;
/* read the buffer size from the CAM */ /* read the buffer size from the CAM */
if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN | CMDREG_SR)) != 0) ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND,
IRQEN | CMDREG_SR);
if (ret)
return ret; return ret;
ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_DA, HZ); ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_DA, HZ);
if (ret != 0) if (ret)
return ret; return ret;
if ((ret = dvb_ca_en50221_read_data(ca, slot, buf, 2)) != 2) ret = dvb_ca_en50221_read_data(ca, slot, buf, 2);
if (ret != 2)
return -EIO; return -EIO;
if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN)) != 0) ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN);
if (ret)
return ret; return ret;
/* store it, and choose the minimum of our buffer and the CAM's buffer size */ /* store it, and choose the minimum of our buffer and the CAM's buffer size */
@ -369,13 +373,18 @@ static int dvb_ca_en50221_link_init(struct dvb_ca_private *ca, int slot)
dprintk("Chosen link buffer size of %i\n", buf_size); dprintk("Chosen link buffer size of %i\n", buf_size);
/* write the buffer size to the CAM */ /* write the buffer size to the CAM */
if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN | CMDREG_SW)) != 0) ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND,
IRQEN | CMDREG_SW);
if (ret)
return ret; return ret;
if ((ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_FR, HZ / 10)) != 0) ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_FR, HZ / 10);
if (ret)
return ret; return ret;
if ((ret = dvb_ca_en50221_write_data(ca, slot, buf, 2)) != 2) ret = dvb_ca_en50221_write_data(ca, slot, buf, 2);
if (ret != 2)
return -EIO; return -EIO;
if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN)) != 0) ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN);
if (ret)
return ret; return ret;
/* success */ /* success */
@ -395,42 +404,45 @@ static int dvb_ca_en50221_link_init(struct dvb_ca_private *ca, int slot)
* @return 0 on success, nonzero on error. * @return 0 on success, nonzero on error.
*/ */
static int dvb_ca_en50221_read_tuple(struct dvb_ca_private *ca, int slot, static int dvb_ca_en50221_read_tuple(struct dvb_ca_private *ca, int slot,
int *address, int *tupleType, int *address, int *tuple_type,
int *tupleLength, u8 *tuple) int *tuple_length, u8 *tuple)
{ {
int i; int i;
int _tupleType; int _tuple_type;
int _tupleLength; int _tuple_length;
int _address = *address; int _address = *address;
/* grab the next tuple length and type */ /* grab the next tuple length and type */
if ((_tupleType = ca->pub->read_attribute_mem(ca->pub, slot, _address)) < 0) _tuple_type = ca->pub->read_attribute_mem(ca->pub, slot, _address);
return _tupleType; if (_tuple_type < 0)
if (_tupleType == 0xff) { return _tuple_type;
dprintk("END OF CHAIN TUPLE type:0x%x\n", _tupleType); if (_tuple_type == 0xff) {
dprintk("END OF CHAIN TUPLE type:0x%x\n", _tuple_type);
*address += 2; *address += 2;
*tupleType = _tupleType; *tuple_type = _tuple_type;
*tupleLength = 0; *tuple_length = 0;
return 0; return 0;
} }
if ((_tupleLength = ca->pub->read_attribute_mem(ca->pub, slot, _address + 2)) < 0) _tuple_length = ca->pub->read_attribute_mem(ca->pub, slot,
return _tupleLength; _address + 2);
if (_tuple_length < 0)
return _tuple_length;
_address += 4; _address += 4;
dprintk("TUPLE type:0x%x length:%i\n", _tupleType, _tupleLength); dprintk("TUPLE type:0x%x length:%i\n", _tuple_type, _tuple_length);
/* read in the whole tuple */ /* read in the whole tuple */
for (i = 0; i < _tupleLength; i++) { for (i = 0; i < _tuple_length; i++) {
tuple[i] = ca->pub->read_attribute_mem(ca->pub, slot, _address + (i * 2)); tuple[i] = ca->pub->read_attribute_mem(ca->pub, slot, _address + (i * 2));
dprintk(" 0x%02x: 0x%02x %c\n", dprintk(" 0x%02x: 0x%02x %c\n",
i, tuple[i] & 0xff, i, tuple[i] & 0xff,
((tuple[i] > 31) && (tuple[i] < 127)) ? tuple[i] : '.'); ((tuple[i] > 31) && (tuple[i] < 127)) ? tuple[i] : '.');
} }
_address += (_tupleLength * 2); _address += (_tuple_length * 2);
// success // success
*tupleType = _tupleType; *tuple_type = _tuple_type;
*tupleLength = _tupleLength; *tuple_length = _tuple_length;
*address = _address; *address = _address;
return 0; return 0;
} }
@ -448,8 +460,8 @@ static int dvb_ca_en50221_read_tuple(struct dvb_ca_private *ca, int slot,
static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot) static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot)
{ {
int address = 0; int address = 0;
int tupleLength; int tuple_length;
int tupleType; int tuple_type;
u8 tuple[257]; u8 tuple[257];
char *dvb_str; char *dvb_str;
int rasz; int rasz;
@ -462,39 +474,43 @@ static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot)
// CISTPL_DEVICE_0A // CISTPL_DEVICE_0A
if ((status = status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type,
dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, &tupleLength, tuple)) < 0) &tuple_length, tuple);
if (status < 0)
return status; return status;
if (tupleType != 0x1D) if (tuple_type != 0x1D)
return -EINVAL; return -EINVAL;
// CISTPL_DEVICE_0C // CISTPL_DEVICE_0C
if ((status = status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type,
dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, &tupleLength, tuple)) < 0) &tuple_length, tuple);
if (status < 0)
return status; return status;
if (tupleType != 0x1C) if (tuple_type != 0x1C)
return -EINVAL; return -EINVAL;
// CISTPL_VERS_1 // CISTPL_VERS_1
if ((status = status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type,
dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, &tupleLength, tuple)) < 0) &tuple_length, tuple);
if (status < 0)
return status; return status;
if (tupleType != 0x15) if (tuple_type != 0x15)
return -EINVAL; return -EINVAL;
// CISTPL_MANFID // CISTPL_MANFID
if ((status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type,
&tupleLength, tuple)) < 0) &tuple_length, tuple);
if (status < 0)
return status; return status;
if (tupleType != 0x20) if (tuple_type != 0x20)
return -EINVAL; return -EINVAL;
if (tupleLength != 4) if (tuple_length != 4)
return -EINVAL; return -EINVAL;
manfid = (tuple[1] << 8) | tuple[0]; manfid = (tuple[1] << 8) | tuple[0];
devid = (tuple[3] << 8) | tuple[2]; devid = (tuple[3] << 8) | tuple[2];
@ -502,17 +518,18 @@ static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot)
// CISTPL_CONFIG // CISTPL_CONFIG
if ((status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type,
&tupleLength, tuple)) < 0) &tuple_length, tuple);
if (status < 0)
return status; return status;
if (tupleType != 0x1A) if (tuple_type != 0x1A)
return -EINVAL; return -EINVAL;
if (tupleLength < 3) if (tuple_length < 3)
return -EINVAL; return -EINVAL;
/* extract the configbase */ /* extract the configbase */
rasz = tuple[0] & 3; rasz = tuple[0] & 3;
if (tupleLength < (3 + rasz + 14)) if (tuple_length < (3 + rasz + 14))
return -EINVAL; return -EINVAL;
ca->slot_info[slot].config_base = 0; ca->slot_info[slot].config_base = 0;
for (i = 0; i < rasz + 1; i++) { for (i = 0; i < rasz + 1; i++) {
@ -520,10 +537,10 @@ static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot)
} }
/* check it contains the correct DVB string */ /* check it contains the correct DVB string */
dvb_str = findstr((char *)tuple, tupleLength, "DVB_CI_V", 8); dvb_str = findstr((char *)tuple, tuple_length, "DVB_CI_V", 8);
if (dvb_str == NULL) if (dvb_str == NULL)
return -EINVAL; return -EINVAL;
if (tupleLength < ((dvb_str - (char *) tuple) + 12)) if (tuple_length < ((dvb_str - (char *)tuple) + 12))
return -EINVAL; return -EINVAL;
/* is it a version we support? */ /* is it a version we support? */
@ -536,12 +553,14 @@ static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot)
/* process the CFTABLE_ENTRY tuples, and any after those */ /* process the CFTABLE_ENTRY tuples, and any after those */
while ((!end_chain) && (address < 0x1000)) { while ((!end_chain) && (address < 0x1000)) {
if ((status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, status = dvb_ca_en50221_read_tuple(ca, slot, &address,
&tupleLength, tuple)) < 0) &tuple_type, &tuple_length,
tuple);
if (status < 0)
return status; return status;
switch (tupleType) { switch (tuple_type) {
case 0x1B: // CISTPL_CFTABLE_ENTRY case 0x1B: // CISTPL_CFTABLE_ENTRY
if (tupleLength < (2 + 11 + 17)) if (tuple_length < (2 + 11 + 17))
break; break;
/* if we've already parsed one, just use it */ /* if we've already parsed one, just use it */
@ -552,8 +571,10 @@ static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot)
ca->slot_info[slot].config_option = tuple[0] & 0x3f; ca->slot_info[slot].config_option = tuple[0] & 0x3f;
/* OK, check it contains the correct strings */ /* OK, check it contains the correct strings */
if ((findstr((char *)tuple, tupleLength, "DVB_HOST", 8) == NULL) || if (!findstr((char *)tuple, tuple_length,
(findstr((char *)tuple, tupleLength, "DVB_CI_MODULE", 13) == NULL)) "DVB_HOST", 8) ||
!findstr((char *)tuple, tuple_length,
"DVB_CI_MODULE", 13))
break; break;
got_cftableentry = 1; got_cftableentry = 1;
@ -568,7 +589,7 @@ static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot)
default: /* Unknown tuple type - just skip this tuple and move to the next one */ default: /* Unknown tuple type - just skip this tuple and move to the next one */
dprintk("dvb_ca: Skipping unknown tuple type:0x%x length:0x%x\n", dprintk("dvb_ca: Skipping unknown tuple type:0x%x length:0x%x\n",
tupleType, tupleLength); tuple_type, tuple_length);
break; break;
} }
} }
@ -804,7 +825,8 @@ static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot,
* already in progress, we do nothing but awake the kernel thread to * already in progress, we do nothing but awake the kernel thread to
* process the data if necessary. * process the data if necessary.
*/ */
if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS);
if (status < 0)
goto exitnowrite; goto exitnowrite;
if (status & (STATUSREG_DA | STATUSREG_RE)) { if (status & (STATUSREG_DA | STATUSREG_RE)) {
if (status & STATUSREG_DA) if (status & STATUSREG_DA)
@ -815,12 +837,14 @@ static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot,
} }
/* OK, set HC bit */ /* OK, set HC bit */
if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND,
IRQEN | CMDREG_HC)) != 0) IRQEN | CMDREG_HC);
if (status)
goto exit; goto exit;
/* check if interface is still free */ /* check if interface is still free */
if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS);
if (status < 0)
goto exit; goto exit;
if (!(status & STATUSREG_FR)) { if (!(status & STATUSREG_FR)) {
/* it wasn't free => try again later */ /* it wasn't free => try again later */
@ -852,20 +876,26 @@ static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot,
} }
/* send the amount of data */ /* send the amount of data */
if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_HIGH, bytes_write >> 8)) != 0) status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_HIGH,
bytes_write >> 8);
if (status)
goto exit; goto exit;
if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_LOW, status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_LOW,
bytes_write & 0xff)) != 0) bytes_write & 0xff);
if (status)
goto exit; goto exit;
/* send the buffer */ /* send the buffer */
for (i = 0; i < bytes_write; i++) { for (i = 0; i < bytes_write; i++) {
if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_DATA, buf[i])) != 0) status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_DATA,
buf[i]);
if (status)
goto exit; goto exit;
} }
/* check for write error (WE should now be 0) */ /* check for write error (WE should now be 0) */
if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS);
if (status < 0)
goto exit; goto exit;
if (status & STATUSREG_WE) { if (status & STATUSREG_WE) {
ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT;
@ -1591,7 +1621,8 @@ static ssize_t dvb_ca_en50221_io_read(struct file *file, char __user *buf,
return -EINVAL; return -EINVAL;
/* wait for some data */ /* wait for some data */
if ((status = dvb_ca_en50221_io_read_condition(ca, &result, &slot)) == 0) { status = dvb_ca_en50221_io_read_condition(ca, &result, &slot);
if (status == 0) {
/* if we're in nonblocking mode, exit immediately */ /* if we're in nonblocking mode, exit immediately */
if (file->f_flags & O_NONBLOCK) if (file->f_flags & O_NONBLOCK)
@ -1829,7 +1860,8 @@ int dvb_ca_en50221_init(struct dvb_adapter *dvb_adapter,
return -EINVAL; return -EINVAL;
/* initialise the system data */ /* initialise the system data */
if ((ca = kzalloc(sizeof(struct dvb_ca_private), GFP_KERNEL)) == NULL) { ca = kzalloc(sizeof(*ca), GFP_KERNEL);
if (!ca) {
ret = -ENOMEM; ret = -ENOMEM;
goto exit; goto exit;
} }
@ -1837,7 +1869,9 @@ int dvb_ca_en50221_init(struct dvb_adapter *dvb_adapter,
ca->pub = pubca; ca->pub = pubca;
ca->flags = flags; ca->flags = flags;
ca->slot_count = slot_count; ca->slot_count = slot_count;
if ((ca->slot_info = kcalloc(slot_count, sizeof(struct dvb_ca_slot), GFP_KERNEL)) == NULL) { ca->slot_info = kcalloc(slot_count, sizeof(struct dvb_ca_slot),
GFP_KERNEL);
if (!ca->slot_info) {
ret = -ENOMEM; ret = -ENOMEM;
goto free_ca; goto free_ca;
} }