[PATCH 2/2] firmware: qcom: scm: Fix interrupted SCM calls

[Will Deacon]

On Tue, Nov 29, 2016 at 01:44:23AM -0600, Andy Gross wrote:
> This patch adds a Qualcomm specific quirk to the arm_smccc_smc call.
> 
> On Qualcomm ARM64 platforms, the SMC call can return before it has
> completed.  If this occurs, the call can be restarted, but it requires
> using the returned session ID value from the interrupted SMC call.
> 
> The quirk stores off the session ID from the interrupted call in the
> quirk structure so that it can be used by the caller.
> 
> This patch folds in a fix given by Sricharan R:
> https://lkml.org/lkml/2016/9/28/272
> 
> Signed-off-by: Andy Gross <andy.gross at linaro.org>
> ---
>  arch/arm64/kernel/smccc-call.S |  9 ++++++++-
>  drivers/firmware/qcom_scm-64.c | 11 +++++++++--
>  include/linux/arm-smccc.h      | 11 ++++++++---
>  3 files changed, 25 insertions(+), 6 deletions(-)

Acked-by: Will Deacon <will.deacon at arm.com>

Will