When contexts are unloaded from GR, the valid bit is reset
but the instance pointer information remains intact.
Check valid bit in *is_channel_ctx_resident* function as
valid bit might not be set when *get_channel_from_ctx function*
is called from gr_isr
Bug 200289491
Change-Id: I4da7f04794c7e7e80b511756dbd851205cd76fbc
Signed-off-by: Seema Khowala <seemaj@nvidia.com>
Reviewed-on: http://git-master/r/1505908
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>