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rtc: ds1307: fix ds1307_native_smbus_read_block_data function

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The i2c_smbus_read_i2c_block_data function returns 0 on success, not the
number of bytes written.

Hence, when there are 32 bytes or less to send, the
ds1307_native_smbus_write_block_data function returns 0 on success,
while it returns the number of bytes when there are more than 32.

The ds1307_write_block_data always returns the number of bytes on
success.

Signed-off-by: Nicolas Boullis <nboullis@debian.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
This commit is contained in:
Nicolas Boullis 2016-04-03 00:10:37 +02:00 committed by Alexandre Belloni
parent ef50f86e15
commit 1d87951c39
1 changed files with 6 additions and 2 deletions
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8
drivers/rtc/rtc-ds1307.c
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@ -275,9 +275,13 @@ static s32 ds1307_native_smbus_write_block_data(const struct i2c_client *client,
{
u8 suboffset = 0;
if (length <= I2C_SMBUS_BLOCK_MAX)
return i2c_smbus_write_i2c_block_data(client,
if (length <= I2C_SMBUS_BLOCK_MAX) {
s32 retval = i2c_smbus_write_i2c_block_data(client,
command, length, values);
if (retval < 0)
return retval;
return length;
}
while (suboffset < length) {
s32 retval = i2c_smbus_write_i2c_block_data(client,