summaryrefslogtreecommitdiffstats
path: root/arch
diff options
context:
space:
mode:
authorAnson Huang <Anson.Huang@nxp.com>2018-07-17 11:28:46 +0800
committerShawn Guo <shawnguo@kernel.org>2018-07-19 10:24:00 +0800
commitde2d9b5284bcb5c159c5882ac69f6bfd4dec7c67 (patch)
treea8c7bd489243e59618b97f67897fec1c8c5801c6 /arch
parent2ceb2780b790b74bc408a949f6aedbad8afa693e (diff)
downloadlinux-stable-de2d9b5284bcb5c159c5882ac69f6bfd4dec7c67.tar.gz
linux-stable-de2d9b5284bcb5c159c5882ac69f6bfd4dec7c67.tar.bz2
linux-stable-de2d9b5284bcb5c159c5882ac69f6bfd4dec7c67.zip
soc: imx: gpc: restrict register range for regmap access
GPC registers are NOT continuous, some registers are reserved and accessing them from userspace will trigger external abort, add regmap register access table to avoid below abort: root@imx6slevk:~# cat /sys/kernel/debug/regmap/20dc000.gpc/registers [ 108.480477] Unhandled fault: imprecise external abort (0x1406) at 0xb6db5004 [ 108.487985] pgd = 42b54bfd [ 108.490741] [b6db5004] *pgd=ba1b7831 [ 108.494386] Internal error: : 1406 [#1] SMP ARM [ 108.498943] Modules linked in: [ 108.502043] CPU: 0 PID: 389 Comm: cat Not tainted 4.18.0-rc1-00074-gc9f1f60-dirty #482 [ 108.509982] Hardware name: Freescale i.MX6 SoloLite (Device Tree) [ 108.516123] PC is at regmap_mmio_read32le+0x20/0x24 [ 108.521031] LR is at regmap_mmio_read+0x40/0x60 [ 108.525586] pc : [<c059cf74>] lr : [<c059d1ac>] psr: 20060093 [ 108.531875] sp : eccf1d98 ip : eccf1da8 fp : eccf1da4 [ 108.537122] r10: ec2d3800 r9 : eccf1f60 r8 : ecfc0000 [ 108.542370] r7 : eccf1e2c r6 : eccf1e2c r5 : 00000028 r4 : ec338e00 [ 108.548920] r3 : 00000000 r2 : eccf1e2c r1 : f0980028 r0 : 00000000 [ 108.555474] Flags: nzCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment none [ 108.562720] Control: 10c5387d Table: acf4004a DAC: 00000051 [ 108.568491] Process cat (pid: 389, stack limit = 0xd4318a65) [ 108.574174] Stack: (0xeccf1d98 to 0xeccf2000) Fixes: 721cabf6c660 ("soc: imx: move PGC handling to a new GPC driver") Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions