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radeon/i2c: do not count reg index in number of i2c byte we are writing.

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Useless to count the register index in number of bytes we are writing.

Fixes a regression with hw i2c enabled.

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Jerome Glisse 2013-11-06 17:42:02 -05:00 committed by Alex Deucher
parent 936b32643c
commit fae009d15a
1 changed files with 4 additions and 2 deletions

6
drivers/gpu/drm/radeon/atombios_i2c.c

@ -56,8 +56,10 @@ static int radeon_process_i2c_ch(struct radeon_i2c_chan *chan,
return -EINVAL; return -EINVAL;
} }
args.ucRegIndex = buf[0]; args.ucRegIndex = buf[0];
if (num > 1) if (num > 1) {
memcpy(&out, &buf[1], num - 1); num--;
memcpy(&out, &buf[1], num);
}
args.lpI2CDataOut = cpu_to_le16(out); args.lpI2CDataOut = cpu_to_le16(out);
} else { } else {
if (num > ATOM_MAX_HW_I2C_READ) { if (num > ATOM_MAX_HW_I2C_READ) {