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    Subject[PATCH 3.12 137/212] radeon/i2c: do not count reg index in number of i2c byte we are writing.
    Date
    3.12-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Jerome Glisse <jglisse@redhat.com>

    commit fae009d15a44e5f1d938340facf4b8bc7dc69a09 upstream.

    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>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/gpu/drm/radeon/atombios_i2c.c | 6 ++++--
    1 file changed, 4 insertions(+), 2 deletions(-)

    --- a/drivers/gpu/drm/radeon/atombios_i2c.c
    +++ b/drivers/gpu/drm/radeon/atombios_i2c.c
    @@ -56,8 +56,10 @@ static int radeon_process_i2c_ch(struct
    return -EINVAL;
    }
    args.ucRegIndex = buf[0];
    - if (num > 1)
    - memcpy(&out, &buf[1], num - 1);
    + if (num > 1) {
    + num--;
    + memcpy(&out, &buf[1], num);
    + }
    args.lpI2CDataOut = cpu_to_le16(out);
    } else {
    if (num > ATOM_MAX_HW_I2C_READ) {



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