On Fri, 06 Jul 2018, Rafael David Tinoco wrote: > Fixes: https://bugs.linaro.org/show_bug.cgi?id=3903 > > LTP Functional tests have caused a bad paging request when triggering > the regmap_read_debugfs() logic of the device PMIC Hi6553 (reading > regmap/f8000000.pmic/registers file during read_all test): > > Unable to handle kernel paging request at virtual address ffff0 > [ffff00000984e000] pgd=0000000077ffe803, pud=0000000077ffd803,0 > Internal error: Oops: 96000007 [#1] SMP > ... > Hardware name: HiKey Development Board (DT) > ... > Call trace: > regmap_mmio_read8+0x24/0x40 > regmap_mmio_read+0x48/0x70 > _regmap_bus_reg_read+0x38/0x48 > _regmap_read+0x68/0x170 > regmap_read+0x50/0x78 > regmap_read_debugfs+0x1a0/0x308 > regmap_map_read_file+0x48/0x58 > full_proxy_read+0x68/0x98 > __vfs_read+0x48/0x80 > vfs_read+0x94/0x150 > SyS_read+0x6c/0xd8 > el0_svc_naked+0x30/0x34 > Code: aa1e03e0 d503201f f9400280 8b334000 (39400000) > > Investigations have showed that, when triggered by debugfs read() > handler, the mmio regmap logic was reading a bigger (16k) register area > than the one mapped by devm_ioremap_resource() during hi655x-pmic probe > time (4k). > > This commit changes hi655x's max register, according to HW specs, to be > the same as the one declared in the pmic device in hi6220's dts, fixing > the issue. > > Signed-off-by: Rafael David Tinoco <rafael.tinoco@xxxxxxxxxx> > Cc: <stable@xxxxxxxxxxxxxxx> #v4.9 #v4.14 #v4.16 #v4.17 > --- > drivers/mfd/hi655x-pmic.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) Applied, thanks. -- Lee Jones [李琼斯] Linaro Services Technical Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog
