[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <ZV6buHrQy2+CJ7xX@debian-scheme>
Date: Thu, 23 Nov 2023 08:24:24 +0800
From: Zhenyu Wang <zhenyuw@...ux.intel.com>
To: Christian Brauner <brauner@...nel.org>
Cc: linux-fsdevel@...r.kernel.org, Christoph Hellwig <hch@....de>,
Jan Kara <jack@...e.cz>, Vitaly Kuznetsov <vkuznets@...hat.com>,
Sean Christopherson <seanjc@...gle.com>,
Paolo Bonzini <pbonzini@...hat.com>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
David Woodhouse <dwmw2@...radead.org>, Paul Durrant <paul@....org>,
Oded Gabbay <ogabbay@...nel.org>, Wu Hao <hao.wu@...el.com>,
Tom Rix <trix@...hat.com>, Moritz Fischer <mdf@...nel.org>,
Xu Yilun <yilun.xu@...el.com>,
Zhenyu Wang <zhenyuw@...ux.intel.com>,
Zhi Wang <zhi.a.wang@...el.com>,
Jani Nikula <jani.nikula@...ux.intel.com>,
Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@...el.com>,
Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
Leon Romanovsky <leon@...nel.org>, Jason Gunthorpe <jgg@...pe.ca>,
Frederic Barrat <fbarrat@...ux.ibm.com>,
Andrew Donnellan <ajd@...ux.ibm.com>, Arnd Bergmann <arnd@...db.de>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Eric Farman <farman@...ux.ibm.com>,
Matthew Rosato <mjrosato@...ux.ibm.com>,
Halil Pasic <pasic@...ux.ibm.com>,
Vineeth Vijayan <vneethv@...ux.ibm.com>,
Peter Oberparleiter <oberpar@...ux.ibm.com>,
Heiko Carstens <hca@...ux.ibm.com>,
Vasily Gorbik <gor@...ux.ibm.com>,
Alexander Gordeev <agordeev@...ux.ibm.com>,
Christian Borntraeger <borntraeger@...ux.ibm.com>,
Sven Schnelle <svens@...ux.ibm.com>,
Tony Krowiak <akrowiak@...ux.ibm.com>,
Jason Herne <jjherne@...ux.ibm.com>,
Harald Freudenberger <freude@...ux.ibm.com>,
"Michael S. Tsirkin" <mst@...hat.com>,
Jason Wang <jasowang@...hat.com>,
Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
Diana Craciun <diana.craciun@....nxp.com>,
Alex Williamson <alex.williamson@...hat.com>,
Eric Auger <eric.auger@...hat.com>, Fei Li <fei1.li@...el.com>,
Benjamin LaHaise <bcrl@...ck.org>,
Johannes Weiner <hannes@...xchg.org>,
Michal Hocko <mhocko@...nel.org>,
Roman Gushchin <roman.gushchin@...ux.dev>,
Shakeel Butt <shakeelb@...gle.com>,
Muchun Song <muchun.song@...ux.dev>,
Kirti Wankhede <kwankhede@...dia.com>, kvm@...r.kernel.org,
linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
linux-fpga@...r.kernel.org, intel-gvt-dev@...ts.freedesktop.org,
intel-gfx@...ts.freedesktop.org, linux-rdma@...r.kernel.org,
linuxppc-dev@...ts.ozlabs.org, linux-s390@...r.kernel.org,
linux-usb@...r.kernel.org,
virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
linux-aio@...ck.org, cgroups@...r.kernel.org, linux-mm@...ck.org,
Jens Axboe <axboe@...nel.dk>,
Pavel Begunkov <asml.silence@...il.com>, io-uring@...r.kernel.org
Subject: Re: [PATCH v2 1/4] i915: make inject_virtual_interrupt() void
On 2023.11.22 13:48:22 +0100, Christian Brauner wrote:
> The single caller of inject_virtual_interrupt() ignores the return value
> anyway. This allows us to simplify eventfd_signal() in follow-up
> patches.
>
> Signed-off-by: Christian Brauner <brauner@...nel.org>
> ---
> drivers/gpu/drm/i915/gvt/interrupt.c | 14 +++++++-------
> 1 file changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gvt/interrupt.c b/drivers/gpu/drm/i915/gvt/interrupt.c
> index de3f5903d1a7..9665876b4b13 100644
> --- a/drivers/gpu/drm/i915/gvt/interrupt.c
> +++ b/drivers/gpu/drm/i915/gvt/interrupt.c
> @@ -422,7 +422,7 @@ static void init_irq_map(struct intel_gvt_irq *irq)
> #define MSI_CAP_DATA(offset) (offset + 8)
> #define MSI_CAP_EN 0x1
>
> -static int inject_virtual_interrupt(struct intel_vgpu *vgpu)
> +static void inject_virtual_interrupt(struct intel_vgpu *vgpu)
> {
> unsigned long offset = vgpu->gvt->device_info.msi_cap_offset;
> u16 control, data;
> @@ -434,10 +434,10 @@ static int inject_virtual_interrupt(struct intel_vgpu *vgpu)
>
> /* Do not generate MSI if MSIEN is disabled */
> if (!(control & MSI_CAP_EN))
> - return 0;
> + return;
>
> if (WARN(control & GENMASK(15, 1), "only support one MSI format\n"))
> - return -EINVAL;
> + return;
>
> trace_inject_msi(vgpu->id, addr, data);
>
> @@ -451,10 +451,10 @@ static int inject_virtual_interrupt(struct intel_vgpu *vgpu)
> * returned and don't inject interrupt into guest.
> */
> if (!test_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status))
> - return -ESRCH;
> - if (vgpu->msi_trigger && eventfd_signal(vgpu->msi_trigger, 1) != 1)
> - return -EFAULT;
> - return 0;
> + return;
> + if (!vgpu->msi_trigger)
> + return;
> + eventfd_signal(vgpu->msi_trigger, 1);
> }
I think it's a little simpler to write as
if (vgpu->msi_trigger)
eventfd_signal(vgpu->msi_trigger, 1);
Looks fine with me.
Reviewed-by: Zhenyu Wang <zhenyuw@...ux.intel.com>
Thanks!
>
> static void propagate_event(struct intel_gvt_irq *irq,
>
> --
> 2.42.0
>
Download attachment "signature.asc" of type "application/pgp-signature" (196 bytes)
Powered by blists - more mailing lists