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Murali NalajalaandGreg Kroah-Hartman
cdf7efe4b0
commit9960085a3aupstream. Currently get_wq_ctx() is wrongly configured as a standard call. When two SMC calls are in sleep and one SMC wakes up, it calls get_wq_ctx() to resume the corresponding sleeping thread. But if get_wq_ctx() is interrupted, goes to sleep and another SMC call is waiting to be allocated a waitq context, it leads to a deadlock. To avoid this get_wq_ctx() must be an atomic call and can't be a standard SMC call. Hence mark get_wq_ctx() as a fast call. Fixes:6bf3259922("firmware: qcom: scm: Add wait-queue handling logic") Cc: stable@vger.kernel.org Signed-off-by: Murali Nalajala <quic_mnalajal@quicinc.com> Signed-off-by: Unnathi Chalicheemala <quic_uchalich@quicinc.com> Reviewed-by: Elliot Berman <quic_eberman@quicinc.com> Link: https://lore.kernel.org/r/20240814223244.40081-1-quic_uchalich@quicinc.com Signed-off-by: Bjorn Andersson <andersson@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>