diff options
| author | Antti Palosaari | 2012-09-12 20:23:51 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab | 2012-09-23 20:48:41 -0300 |
| commit | 2e35c66f138c6a4f50da863a82983a541f1c2a24 (patch) | |
| tree | 78f30199400f681efb8fff3d3bc4506283127754 /drivers | |
| parent | f224749b68034619ff722576f46e4a4932d69d27 (diff) | |
[media] af9015: improve af9015_eeprom_hash()
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/usb/dvb-usb-v2/af9015.c | 49 |
1 files changed, 20 insertions, 29 deletions
diff --git a/drivers/media/usb/dvb-usb-v2/af9015.c b/drivers/media/usb/dvb-usb-v2/af9015.c index c429da7da95d..a4be303edb4f 100644 --- a/drivers/media/usb/dvb-usb-v2/af9015.c +++ b/drivers/media/usb/dvb-usb-v2/af9015.c @@ -398,43 +398,34 @@ error: static int af9015_eeprom_hash(struct dvb_usb_device *d) { struct af9015_state *state = d_to_priv(d); - int ret; - static const unsigned int eeprom_size = 256; - unsigned int reg; - u8 val, *eeprom; - struct req_t req = {READ_I2C, AF9015_I2C_EEPROM, 0, 0, 1, 1, &val}; - - eeprom = kmalloc(eeprom_size, GFP_KERNEL); - if (eeprom == NULL) - return -ENOMEM; - - for (reg = 0; reg < eeprom_size; reg++) { - req.addr = reg; + int ret, i; + static const unsigned int AF9015_EEPROM_SIZE = 256; + u8 buf[AF9015_EEPROM_SIZE]; + struct req_t req = {READ_I2C, AF9015_I2C_EEPROM, 0, 0, 1, 1, NULL}; + + /* read eeprom */ + for (i = 0; i < AF9015_EEPROM_SIZE; i++) { + req.addr = i; + req.data = &buf[i]; ret = af9015_ctrl_msg(d, &req); - if (ret) - goto free; - - eeprom[reg] = val; + if (ret < 0) + goto err; } - for (reg = 0; reg < eeprom_size; reg += 16) - dev_dbg(&d->udev->dev, "%s: %*ph\n", __func__, 16, - eeprom + reg); - - BUG_ON(eeprom_size % 4); - - state->eeprom_sum = 0; - for (reg = 0; reg < eeprom_size / sizeof(u32); reg++) { + /* calculate checksum */ + for (i = 0; i < AF9015_EEPROM_SIZE / sizeof(u32); i++) { state->eeprom_sum *= GOLDEN_RATIO_PRIME_32; - state->eeprom_sum += le32_to_cpu(((u32 *)eeprom)[reg]); + state->eeprom_sum += le32_to_cpu(((u32 *)buf)[i]); } + for (i = 0; i < AF9015_EEPROM_SIZE; i += 16) + dev_dbg(&d->udev->dev, "%s: %*ph\n", __func__, 16, buf + i); + dev_dbg(&d->udev->dev, "%s: eeprom sum=%.8x\n", __func__, state->eeprom_sum); - - ret = 0; -free: - kfree(eeprom); + return 0; +err: + dev_err(&d->udev->dev, "%s: eeprom failed=%d\n", KBUILD_MODNAME, ret); return ret; } |