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Open Source and information security mailing list archives
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Date: Sat, 12 Sep 2020 19:38:29 +0000 From: Michael Kelley <mikelley@...rosoft.com> To: Boqun Feng <boqun.feng@...il.com>, "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>, "linux-input@...r.kernel.org" <linux-input@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org> CC: KY Srinivasan <kys@...rosoft.com>, Haiyang Zhang <haiyangz@...rosoft.com>, Stephen Hemminger <sthemmin@...rosoft.com>, Wei Liu <wei.liu@...nel.org>, Jiri Kosina <jikos@...nel.org>, Benjamin Tissoires <benjamin.tissoires@...hat.com>, Dmitry Torokhov <dmitry.torokhov@...il.com>, "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, "James E.J. Bottomley" <jejb@...ux.ibm.com>, "Martin K. Petersen" <martin.petersen@...cle.com>, "will@...nel.org" <will@...nel.org>, "ardb@...nel.org" <ardb@...nel.org>, "arnd@...db.de" <arnd@...db.de>, "catalin.marinas@....com" <catalin.marinas@....com>, "Mark.Rutland@....com" <Mark.Rutland@....com>, "maz@...nel.org" <maz@...nel.org>, Jiri Kosina <jkosina@...e.cz> Subject: RE: [PATCH v3 09/11] HID: hyperv: Make ringbuffer at least take two pages From: Boqun Feng <boqun.feng@...il.com> Sent: Thursday, September 10, 2020 7:35 AM > > When PAGE_SIZE > HV_HYP_PAGE_SIZE, we need the ringbuffer size to be at > least 2 * PAGE_SIZE: one page for the header and at least one page of > the data part (because of the alignment requirement for double mapping). > > So make sure the ringbuffer sizes to be at least 2 * PAGE_SIZE when > using vmbus_open() to establish the vmbus connection. > > Signed-off-by: Boqun Feng <boqun.feng@...il.com> > Acked-by: Jiri Kosina <jkosina@...e.cz> > --- > Hi Jiri, > > Thanks for your acked-by. I make a small change in this version (casting > 2 * PAGE_SIZE into int to avoid compiler warnings), and it make no > functional change. If the change is inappropriate, please let me know. > > drivers/hid/hid-hyperv.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > Reviewed-by: Michael Kelley <mikelley@...rosoft.com>
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