From: Sanchayan Maity <maitysanchayan@xxxxxxxxx> Sent: Monday, October 19, 2015 3:43 PM >To: jic23@xxxxxxxxxx >Cc: stefan@xxxxxxxx; Duan Fugang-B38611; linux-iio@xxxxxxxxxxxxxxx; linux->kernel@xxxxxxxxxxxxxxx; Sanchayan Maity >Subject: [PATCH] iio: adc: vf610_adc: Fix division by zero error > >In case the fsl,adck-max-frequency property is not present in >the device tree, a division by zero error results during the >probe call on kernel boot (see below). This patch fixes it and >also restores device tree compatibility in case kernels are >booting with old device trees without this property specified. > >[ 1.063229] Division by zero in kernel. >[ 1.067152] CPU: 0 PID: 1 Comm: swapper Not tainted >4.3.0-rc5-00212-gcc88cef #37 >[ 1.074650] Hardware name: Freescale Vybrid VF5xx/VF6xx (Device Tree) >[ 1.081135] Backtrace: >[ 1.083694] [<800134a4>] (dump_backtrace) from [<8001369c>] >(show_stack+0x18/0x1c) >[ 1.091340] r7:00000008 r6:8e0ae210 r5:00000000 r4:8e299800 >[ 1.097146] [<80013684>] (show_stack) from [<80297b1c>] >(dump_stack+0x24/0x28) >[ 1.104483] [<80297af8>] (dump_stack) from [<80013608>] >(__div0+0x1c/0x20) >[ 1.111421] [<800135ec>] (__div0) from [<802968b4>] (Ldiv0+0x8/0x10) >[ 1.117865] [<80424350>] (vf610_adc_probe) from [<803153b4>] >(platform_drv_probe+0x4c/0xac) >[ 1.126311] r10:00000000 r9:8076a5ec r8:00000000 r7:fffffdfb >r6:807cc67c r5:8e0ae210 >[ 1.134319] r4:807f6c54 >[ 1.136915] [<80315368>] (platform_drv_probe) from [<803138bc>] >(driver_probe_device+0x20c/0x2f8) >[ 1.145882] r7:807cc67c r6:00000000 r5:8e0ae210 r4:807f6c54 >[ 1.151657] [<803136b0>] (driver_probe_device) from [<80313a3c>] >(__driver_attach+0x94/0x98) >[ 1.160190] r9:8076a5ec r8:00000098 r7:00000000 r6:8e0ae244 >r5:807cc67c r4:8e0ae210 >[ 1.168112] [<803139a8>] (__driver_attach) from [<80311cb8>] >(bus_for_each_dev+0x70/0xa4) >[ 1.176383] r7:00000000 r6:803139a8 r5:807cc67c r4:00000000 >[ 1.182159] [<80311c48>] (bus_for_each_dev) from [<80313318>] >(driver_attach+0x24/0x28) >[ 1.190260] r6:807bb568 r5:8e2a5b00 r4:807cc67c >[ 1.194996] [<803132f4>] (driver_attach) from [<80312f50>] >(bus_add_driver+0x1a4/0x21c) >[ 1.203113] [<80312dac>] (bus_add_driver) from [<803142a8>] >(driver_register+0x80/0x100) >[ 1.211275] r7:8e2a7dc0 r6:807a8160 r5:80789e14 r4:807cc67c >[ 1.217075] [<80314228>] (driver_register) from [<803152f8>] >(__platform_driver_register+0x5c/0x64) >[ 1.226216] r5:80789e14 r4:807a8160 >[ 1.229877] [<8031529c>] (__platform_driver_register) from >[<80789e30>] (vf610_adc_driver_init+0x1c/0x20) >[ 1.239556] [<80789e14>] (vf610_adc_driver_init) from [<800095f8>] >(do_one_initcall+0x94/0x1dc) >[ 1.248365] [<80009564>] (do_one_initcall) from [<8076ae34>] >(kernel_init_freeable+0x13c/0x1e0) >[ 1.257155] r10:80794830 r9:8076a5ec r8:00000098 r7:807d5780 >r6:807d5780 r5:00000006 >[ 1.265153] r4:807a0ee8 >[ 1.267753] [<8076acf8>] (kernel_init_freeable) from [<80590ef0>] >(kernel_init+0x18/0xf0) >[ 1.276021] r10:00000000 r9:00000000 r8:00000000 r7:00000000 >r6:00000000 r5:80590ed8 >[ 1.284015] r4:807d5780 >[ 1.286615] [<80590ed8>] (kernel_init) from [<8000f878>] >(ret_from_fork+0x14/0x3c) >[ 1.294278] r5:80590ed8 r4:00000000 > >Signed-off-by: Sanchayan Maity <maitysanchayan@xxxxxxxxx> Acked-by: Fugang Duan <B38611@xxxxxxxxxxxxx>-- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
