From: will.deacon@arm.com (Will Deacon)
To: linus-amlogic@lists.infradead.org
Subject: [PATCH 2/2] firmware: qcom: scm: Fix interrupted SCM calls
Date: Tue, 6 Dec 2016 11:54:57 +0000 [thread overview]
Message-ID: <20161206115456.GC2498@arm.com> (raw)
In-Reply-To: <1480405463-23165-3-git-send-email-andy.gross@linaro.org>
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@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@arm.com>
Will
prev parent reply other threads:[~2016-12-06 11:54 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-29 7:44 [PATCH 0/2] Support ARM SMCC SoC vendor quirks Andy Gross
2016-11-29 7:44 ` [PATCH 1/2] arm: kernel: Add SMC structure parameter Andy Gross
2016-12-06 11:55 ` Will Deacon
2016-12-06 18:01 ` Andy Gross
2016-11-29 7:44 ` [PATCH 2/2] firmware: qcom: scm: Fix interrupted SCM calls Andy Gross
2016-12-06 11:54 ` Will Deacon [this message]
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