From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
To: Linux Media Mailing List <linux-media@vger.kernel.org>
Cc: "Mauro Carvalho Chehab" <mchehab@s-opensource.com>,
"Mauro Carvalho Chehab" <mchehab@infradead.org>,
"Andy Lutomirski" <luto@amacapital.net>,
"Johannes Stezenbach" <js@linuxtv.org>,
"Jiri Kosina" <jikos@kernel.org>,
"Patrick Boettcher" <patrick.boettcher@posteo.de>,
"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
"Andy Lutomirski" <luto@kernel.org>,
"Michael Krufky" <mkrufky@linuxtv.org>,
"Mauro Carvalho Chehab" <mchehab@kernel.org>,
"Jörg Otte" <jrg.otte@gmail.com>
Subject: [PATCH v2 00/31] Don't use stack for DMA transers on media usb drivers
Date: Tue, 11 Oct 2016 07:09:15 -0300 [thread overview]
Message-ID: <cover.1476179975.git.mchehab@s-opensource.com> (raw)
Sending URB control messages from stack was never supported. Yet, on x86,
the stack was usually at a memory region that allows DMA transfer.
So, several drivers got it wrong. On Kernel 4.9, if VMAP_STACK=y, none of
those drivers will work, as the stack won't be on a DMA-able area anymore.
So, fix the media drivers that requre it. It should noticed that the vast
majority are at dvb-usb.
Please notice that those patches are compile-tested only. So, I really
appreciate if people with devices using those drivers could test and
report if they don't break anything. I intend to send this
PS.: I didn't verify any media driver inside staging.
Version 2:
- Added other USB drivers that are out of dvb-usb. After this series, all
drivers will use kmalloc'ed buffers, although I won't doubt that some
implementations may still have issues.
- Be sure that, on all places where it is using a buffer allocated at the
dvb-usb state structs, they'll be protected by some mutex. On some
such cases, there was already a mutex at the DVB core. So, I didn't
need to add a new one. Thanks to Antti that reminded me about such
need.
Mauro Carvalho Chehab (31):
af9005: don't do DMA on stack
cinergyT2-core: don't do DMA on stack
cinergyT2-core: handle error code on RC query
cinergyT2-fe: cache stats at cinergyt2_fe_read_status()
cinergyT2-fe: don't do DMA on stack
cxusb: don't do DMA on stack
dib0700: be sure that dib0700_ctrl_rd() users can do DMA
dib0700_core: don't use stack on I2C reads
dibusb: don't do DMA on stack
dibusb: handle error code on RC query
digitv: don't do DMA on stack
dtt200u-fe: don't keep waiting for lock at set_frontend()
dtt200u-fe: don't do DMA on stack
dtt200u-fe: handle errors on USB control messages
dtt200u: don't do DMA on stack
dtt200u: handle USB control message errors
dtv5100: don't do DMA on stack
gp8psk: don't do DMA on stack
gp8psk: don't go past the buffer size
nova-t-usb2: don't do DMA on stack
pctv452e: don't do DMA on stack
pctv452e: don't call BUG_ON() on non-fatal error
technisat-usb2: use DMA buffers for I2C transfers
dvb-usb: warn if return value for USB read/write routines is not
checked
nova-t-usb2: handle error code on RC query
dw2102: return error if su3000_power_ctrl() fails
digitv: handle error code on RC query
cpia2_usb: don't use stack for DMA
s2255drv: don't use stack for DMA
stk-webcam: don't use stack for DMA
flexcop-usb: don't use stack for DMA
drivers/media/usb/b2c2/flexcop-usb.c | 105 +++++----
drivers/media/usb/b2c2/flexcop-usb.h | 4 +
drivers/media/usb/cpia2/cpia2_usb.c | 32 ++-
drivers/media/usb/dvb-usb/af9005.c | 317 ++++++++++++++++------------
drivers/media/usb/dvb-usb/cinergyT2-core.c | 90 +++++---
drivers/media/usb/dvb-usb/cinergyT2-fe.c | 100 ++++-----
drivers/media/usb/dvb-usb/cxusb.c | 62 +++---
drivers/media/usb/dvb-usb/cxusb.h | 6 +
drivers/media/usb/dvb-usb/dib0700_core.c | 31 ++-
drivers/media/usb/dvb-usb/dib0700_devices.c | 25 +--
drivers/media/usb/dvb-usb/dibusb-common.c | 113 +++++++---
drivers/media/usb/dvb-usb/dibusb.h | 3 +
drivers/media/usb/dvb-usb/digitv.c | 26 ++-
drivers/media/usb/dvb-usb/digitv.h | 3 +
drivers/media/usb/dvb-usb/dtt200u-fe.c | 128 +++++++----
drivers/media/usb/dvb-usb/dtt200u.c | 120 ++++++++---
drivers/media/usb/dvb-usb/dtv5100.c | 10 +-
drivers/media/usb/dvb-usb/dvb-usb.h | 6 +-
drivers/media/usb/dvb-usb/dw2102.c | 2 +-
drivers/media/usb/dvb-usb/gp8psk.c | 25 ++-
drivers/media/usb/dvb-usb/nova-t-usb2.c | 25 ++-
drivers/media/usb/dvb-usb/pctv452e.c | 136 +++++++-----
drivers/media/usb/dvb-usb/technisat-usb2.c | 16 +-
drivers/media/usb/s2255/s2255drv.c | 15 +-
drivers/media/usb/stkwebcam/stk-webcam.c | 16 +-
25 files changed, 918 insertions(+), 498 deletions(-)
--
2.7.4
next reply other threads:[~2016-10-11 10:11 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-11 10:09 Mauro Carvalho Chehab [this message]
2016-10-11 10:09 ` [PATCH v2 01/31] af9005: don't do DMA on stack Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 02/31] cinergyT2-core: " Mauro Carvalho Chehab
2016-10-15 20:54 ` Johannes Stezenbach
2016-10-17 17:12 ` Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 03/31] cinergyT2-core: handle error code on RC query Mauro Carvalho Chehab
2016-10-12 2:13 ` [PATCH v2.1 " Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 04/31] cinergyT2-fe: cache stats at cinergyt2_fe_read_status() Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 05/31] cinergyT2-fe: don't do DMA on stack Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 06/31] cxusb: " Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 07/31] dib0700: be sure that dib0700_ctrl_rd() users can do DMA Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 08/31] dib0700_core: don't use stack on I2C reads Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 09/31] dibusb: don't do DMA on stack Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 10/31] dibusb: handle error code on RC query Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 11/31] digitv: don't do DMA on stack Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 12/31] dtt200u-fe: don't keep waiting for lock at set_frontend() Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 13/31] dtt200u-fe: don't do DMA on stack Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 14/31] dtt200u-fe: handle errors on USB control messages Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 15/31] dtt200u: don't do DMA on stack Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 16/31] dtt200u: handle USB control message errors Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 17/31] dtv5100: don't do DMA on stack Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 18/31] gp8psk: " Mauro Carvalho Chehab
2016-11-06 19:51 ` VDR User
2016-11-07 11:29 ` Johannes Stezenbach
2016-11-07 12:53 ` Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 19/31] gp8psk: don't go past the buffer size Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 20/31] nova-t-usb2: don't do DMA on stack Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 21/31] pctv452e: " Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 22/31] pctv452e: don't call BUG_ON() on non-fatal error Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 23/31] technisat-usb2: use DMA buffers for I2C transfers Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 24/31] dvb-usb: warn if return value for USB read/write routines is not checked Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 25/31] nova-t-usb2: handle error code on RC query Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 26/31] dw2102: return error if su3000_power_ctrl() fails Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 27/31] digitv: handle error code on RC query Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 28/31] cpia2_usb: don't use stack for DMA Mauro Carvalho Chehab
2016-10-11 22:56 ` Kosuke Tatsukawa
2016-10-12 2:18 ` [PATCH v2 .1 " Mauro Carvalho Chehab
2016-10-12 2:19 ` [PATCH v2 " Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 29/31] s2255drv: " Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 30/31] stk-webcam: " Mauro Carvalho Chehab
2016-10-11 10:09 ` [PATCH v2 31/31] flexcop-usb: " Mauro Carvalho Chehab
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