staging: sm750fb: free cmap on framebuffer release

The cmap is allocated by lynxfb_set_fbinfo() but never freed, so it is
leaked when the framebuffer is torn down.  This happens on every unbind,
and on the register_framebuffer() error path in
sm750fb_framebuffer_alloc().

Add a lynxfb_unset_fbinfo() cleanup counterpart to lynxfb_set_fbinfo()
which deallocates the cmap, and call it on teardown.  In the alloc error
path it is only called once lynxfb_set_fbinfo() has succeeded, so the
cmap is only freed when it was actually allocated.

Fixes: 81dee67e215b ("staging: sm750fb: add sm750 to staging")
Suggested-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Lucas Costa <2000.costalucas@gmail.com>
Link: https://patch.msgid.link/20260922142851.46724-1-2000.costalucas@gmail.com
Reviewed-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

0 files changed, 0 insertions, 0 deletions