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drm/i915: Free write_buf that we allocated with kzalloc.

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We use kzalloc to allocate the write_buf that we use for
i2c transfer on hdcp write. But it seems that we are forgetting
to free the memory that is not needed after i2c transfer is
completed.

Reported-by: Brian J Wood <brian.j.wood@intel.com>
Fixes: 2320175feb ("drm/i915: Implement HDCP for HDMI")
Cc: Ramalingam C <ramalingam.c@intel.com>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: <stable@vger.kernel.org> # v4.17+
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20180823205136.31310-1-rodrigo.vivi@intel.com
(cherry picked from commit 62d3a8deaa)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
Rodrigo Vivi 2018-08-23 13:51:36 -07:00
parent 5b2695fd4b
commit 1b1b116274
1 changed files with 6 additions and 2 deletions
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8
drivers/gpu/drm/i915/intel_hdmi.c
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@ -943,8 +943,12 @@ static int intel_hdmi_hdcp_write(struct intel_digital_port *intel_dig_port,
ret = i2c_transfer(adapter, &msg, 1);
if (ret == 1)
return 0;
return ret >= 0 ? -EIO : ret;
ret = 0;
else if (ret >= 0)
ret = -EIO;
kfree(write_buf);
return ret;
}
static