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| author | Ingo Molnar <mingo@kernel.org> | 2014-04-25 12:04:22 +0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-04-25 12:04:22 +0400 |
| commit | 42ebd27bcbda7895fa07c61185a26d8379945ed0 (patch) | |
| tree | 51be64b0c2c0defd1a0ce3e6d55452dbd8a7aaae /drivers/gpu/drm/i915/intel_dp.c | |
| parent | a81fef347b32dea2b31275826afe1c93fa0d2d54 (diff) | |
| parent | 9f7ff8931e3c5ddc8535476971ec9501e9555c05 (diff) | |
| download | linux-42ebd27bcbda7895fa07c61185a26d8379945ed0.tar.xz | |
Merge branch 'perf/urgent' into perf/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dp.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index a0dad1a2f819..d2a55884ad52 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -575,7 +575,8 @@ out: return ret; } -#define HEADER_SIZE 4 +#define BARE_ADDRESS_SIZE 3 +#define HEADER_SIZE (BARE_ADDRESS_SIZE + 1) static ssize_t intel_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) { @@ -592,7 +593,7 @@ intel_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) switch (msg->request & ~DP_AUX_I2C_MOT) { case DP_AUX_NATIVE_WRITE: case DP_AUX_I2C_WRITE: - txsize = HEADER_SIZE + msg->size; + txsize = msg->size ? HEADER_SIZE + msg->size : BARE_ADDRESS_SIZE; rxsize = 1; if (WARN_ON(txsize > 20)) @@ -611,7 +612,7 @@ intel_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) case DP_AUX_NATIVE_READ: case DP_AUX_I2C_READ: - txsize = HEADER_SIZE; + txsize = msg->size ? HEADER_SIZE : BARE_ADDRESS_SIZE; rxsize = msg->size + 1; if (WARN_ON(rxsize > 20)) |