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247e5356a7
linux/drivers/net
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Joakim Zhang 247e5356a7 can: flexcan: fix timeout when set small bitrate 
Current we can meet timeout issue when setting a small bitrate like
10000 as follows on i.MX6UL EVK board (ipg clock = 66MHZ, per clock =
30MHZ):

| root@imx6ul7d:~# ip link set can0 up type can bitrate 10000

A link change request failed with some changes committed already.
Interface can0 may have been left with an inconsistent configuration,
please check.

| RTNETLINK answers: Connection timed out

It is caused by calling of flexcan_chip_unfreeze() timeout.

Originally the code is using usleep_range(10, 20) for unfreeze
operation, but the patch (8badd65 can: flexcan: avoid calling
usleep_range from interrupt context) changed it into udelay(10) which is
only a half delay of before, there're also some other delay changes.

After double to FLEXCAN_TIMEOUT_US to 100 can fix the issue.

Meanwhile, Rasmus Villemoes reported that even with a timeout of 100,
flexcan_probe() fails on the MPC8309, which requires a value of at least
140 to work reliably. 250 works for everyone.

Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2019-06-07 23:03:53 +02:00
..
appletalk treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
arcnet treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
bonding SPDX update for 5.2-rc3, round 1 2019-05-31 08:34:32 -07:00
caif treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00
can can: flexcan: fix timeout when set small bitrate 2019-06-07 23:03:53 +02:00
dsa Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-06-07 09:29:14 -07:00
ethernet Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-06-07 09:29:14 -07:00
fddi treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
fjes
hamradio treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 69 2019-05-24 17:36:47 +02:00
hippi treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 128 2019-05-30 11:25:13 -07:00
hyperv SPDX update for 5.2-rc3, round 1 2019-05-31 08:34:32 -07:00
ieee802154 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
ipvlan Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-06-07 09:29:14 -07:00
netdevsim netdevsim: Make nsim_num_vf static 2019-05-05 10:48:45 -07:00
phy net: phylink: avoid reducing support mask 2019-06-04 11:43:24 -07:00
plip treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
ppp treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
slip treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
team treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
usb treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
vmxnet3
wan treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
wimax treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
wireless wireless-drivers fixes for 5.2 2019-06-07 12:16:26 -07:00
xen-netback treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
dummy.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
eql.c
geneve.c ipv6: Move ipv6 stubs to a separate header file 2019-03-29 10:53:45 -07:00
gtp.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
ifb.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
LICENSE.SRC
loopback.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
macsec.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
macvlan.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
macvtap.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
Makefile net: Always descend into dsa/ 2019-05-14 15:20:11 -07:00
mdio.c
mii.c
net_failover.c net: remove 'fallback' argument from dev->ndo_select_queue() 2019-03-20 11:18:55 -07:00
netconsole.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 153 2019-05-30 11:26:32 -07:00
nlmon.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
ntb_netdev.c
rionet.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sb1000.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
Space.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sungem_phy.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
tap.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
thunderbolt.c net: thunderbolt: Unregister ThunderboltIP protocol handler when suspending 2019-04-18 11:18:51 +03:00
tun.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
veth.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
virtio_net.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
vrf.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
vsockmon.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
vxlan.c ipv6: Move ipv6 stubs to a separate header file 2019-03-29 10:53:45 -07:00
xen-netfront.c xen-netfront: mark expected switch fall-through 2019-04-16 21:03:02 -07:00