From cd4361c7e2e0778016a770157d0ccf126fca7a2a Mon Sep 17 00:00:00 2001 From: Michael Hennerich Date: Wed, 22 Feb 2012 13:16:49 +0100 Subject: iio: core: constitfy available_scan_mask The core must not modify available_scan_mask, because it causes problems with drivers where multiple instances of the driver share the same mask set. So make this explicit by marking available scan masks as const. The max1363 driver needs some minor adjustment to accommodate this change. Pull scan mask allocation into a separate function. Signed-off-by: Michael Hennerich Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/staging/iio/adc/max1363_core.c | 36 ++++++++++++++++++++++------------ 1 file changed, 24 insertions(+), 12 deletions(-) (limited to 'drivers/staging/iio/adc') diff --git a/drivers/staging/iio/adc/max1363_core.c b/drivers/staging/iio/adc/max1363_core.c index 3a5bd2084e64..7f39ca3c936f 100644 --- a/drivers/staging/iio/adc/max1363_core.c +++ b/drivers/staging/iio/adc/max1363_core.c @@ -1245,10 +1245,31 @@ static int max1363_initial_setup(struct max1363_state *st) return max1363_set_scan_mode(st); } +static int __devinit max1363_alloc_scan_masks(struct iio_dev *indio_dev) +{ + struct max1363_state *st = iio_priv(indio_dev); + unsigned long *masks; + int i; + + masks = kzalloc(BITS_TO_LONGS(MAX1363_MAX_CHANNELS)*sizeof(long)* + (st->chip_info->num_modes + 1), GFP_KERNEL); + if (!masks) + return -ENOMEM; + + for (i = 0; i < st->chip_info->num_modes; i++) + bitmap_copy(masks + BITS_TO_LONGS(MAX1363_MAX_CHANNELS)*i, + max1363_mode_table[st->chip_info->mode_list[i]] + .modemask, MAX1363_MAX_CHANNELS); + + indio_dev->available_scan_masks = masks; + + return 0; +} + static int __devinit max1363_probe(struct i2c_client *client, const struct i2c_device_id *id) { - int ret, i; + int ret; struct max1363_state *st; struct iio_dev *indio_dev; struct regulator *reg; @@ -1276,19 +1297,10 @@ static int __devinit max1363_probe(struct i2c_client *client, st->chip_info = &max1363_chip_info_tbl[id->driver_data]; st->client = client; - indio_dev->available_scan_masks - = kzalloc(BITS_TO_LONGS(MAX1363_MAX_CHANNELS)*sizeof(long)* - (st->chip_info->num_modes + 1), GFP_KERNEL); - if (!indio_dev->available_scan_masks) { - ret = -ENOMEM; + ret = max1363_alloc_scan_masks(indio_dev); + if (ret) goto error_free_device; - } - for (i = 0; i < st->chip_info->num_modes; i++) - bitmap_copy(indio_dev->available_scan_masks + - BITS_TO_LONGS(MAX1363_MAX_CHANNELS)*i, - max1363_mode_table[st->chip_info->mode_list[i]] - .modemask, MAX1363_MAX_CHANNELS); /* Estabilish that the iio_dev is a child of the i2c device */ indio_dev->dev.parent = &client->dev; indio_dev->name = id->name; -- cgit v1.2.3