From mboxrd@z Thu Jan 1 00:00:00 1970 From: Will Deacon Subject: Re: [PATCH 2/2] firmware: qcom: scm: Fix interrupted SCM calls Date: Tue, 6 Dec 2016 11:54:57 +0000 Message-ID: <20161206115456.GC2498@arm.com> References: <1480405463-23165-1-git-send-email-andy.gross@linaro.org> <1480405463-23165-3-git-send-email-andy.gross@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <1480405463-23165-3-git-send-email-andy.gross-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+glpar-linux-rockchip=m.gmane.org-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org To: Andy Gross Cc: jesper.nilsson-VrBV9hrLPhE@public.gmane.org, lorenzo.pieralisi-5wv7dgnIgG8@public.gmane.org, heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org, linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-arm-msm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org, matthias.bgg-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, Srinivas Kandagatla , lars.persson-VrBV9hrLPhE@public.gmane.org, p.zabel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org, niklas.cassel-VrBV9hrLPhE@public.gmane.org, ck.hu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org, linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-amlogic-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Bjorn Andersson , Kevin Hilman , linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org List-Id: linux-arm-msm@vger.kernel.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 > --- > 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