The patch titled ds2760_battery.c: fix division by zero has been removed from the -mm tree. Its filename was ds2760_batteryc-fix-division-by-zero.patch This patch was dropped because it was merged into mainline or a subsystem tree The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: ds2760_battery.c: fix division by zero From: Daniel Mack <daniel@xxxxxxxx> The 'battery remaining capacity' calculation in drivers/power/ds2760_battery.c lacks a parameter check to a division operation which causes the kernel to oops on my board. [ 21.233750] Division by zero in kernel. [ 21.237646] [<c002955c>] (__div0+0x0/0x20) from [<c012561c>] (Ldiv0+0x8/0x10) [ 21.244816] [<c01bef34>] (ds2760_battery_read_status+0x0/0x2a4) from [<c01bf3a4>] (ds2760_battery_get_property+0x30/0xdc) [ 21.255803] r8:c03a22c0 r7:c7886100 r6:00000009 r5:c782fe7c r4:c7886084 [ 21.262518] [<c01bf374>] (ds2760_battery_get_property+0x0/0xdc) from [<c01bde98>] (power_supply_show_property+0x48/0x114) [ 21.273480] r6:c7996000 r5:00000009 r4:00000000 [ 21.278111] [<c01bde50>] (power_supply_show_property+0x0/0x114) from [<c01be158>] (power_supply_uevent+0x188/0x280) [ 21.288537] r8:00000001 r7:c7886100 r6:c7996000 r5:000000b4 r4:00000000 [ 21.295222] [<c01bdfd0>] (power_supply_uevent+0x0/0x280) from [<c015c664>] (dev_uevent+0xd4/0x10c) [ 21.304199] [<c015c590>] (dev_uevent+0x0/0x10c) from [<c0128440>] (kobject_uevent_env+0x180/0x390) [ 21.313170] r5:00000000 r4:c78860ac [ 21.316725] [<c01282c0>] (kobject_uevent_env+0x0/0x390) from [<c0128664>] (kobject_uevent+0x14/0x18) [ 21.325850] [<c0128650>] (kobject_uevent+0x0/0x18) from [<c01bdc34>] (power_supply_changed_work+0x5c/0x70) [ 21.335506] [<c01bdbd8>] (power_supply_changed_work+0x0/0x70) from [<c004d290>] (run_workqueue+0xbc/0x144) [ 21.345167] r4:c7812040 [ 21.347716] [<c004d1d4>] (run_workqueue+0x0/0x144) from [<c004d94c>] (worker_thread+0xa8/0xbc) [ 21.356296] r7:c7812040 r6:c7820b00 r5:c782ffa4 r4:c7812048 [ 21.361957] [<c004d8a4>] (worker_thread+0x0/0xbc) from [<c0051008>] (kthread+0x5c/0x94) [ 21.369971] r7:00000000 r6:c004d8a4 r5:c7812040 r4:c782e000 [ 21.375612] [<c0050fac>] (kthread+0x0/0x94) from [<c00403d0>] (do_exit+0x0/0x688) Signed-off-by: Daniel Mack <daniel@xxxxxxxx> Cc: Szabolcs Gyurko <szabolcs.gyurko@xxxxxx> Acked-by: Matt Reimer <mreimer@xxxxxxxx> Acked-by: Anton Vorontsov <cbou@xxxxxxx> Cc: David Woodhouse <dwmw2@xxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/power/ds2760_battery.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff -puN drivers/power/ds2760_battery.c~ds2760_batteryc-fix-division-by-zero drivers/power/ds2760_battery.c --- a/drivers/power/ds2760_battery.c~ds2760_batteryc-fix-division-by-zero +++ a/drivers/power/ds2760_battery.c @@ -180,10 +180,13 @@ static int ds2760_battery_read_status(st di->empty_uAh = battery_interpolate(scale, di->temp_C / 10); di->empty_uAh *= 1000; /* convert to µAh */ - /* From Maxim Application Note 131: remaining capacity = - * ((ICA - Empty Value) / (Full Value - Empty Value)) x 100% */ - di->rem_capacity = ((di->accum_current_uAh - di->empty_uAh) * 100L) / - (di->full_active_uAh - di->empty_uAh); + if (di->full_active_uAh == di->empty_uAh) + di->rem_capacity = 0; + else + /* From Maxim Application Note 131: remaining capacity = + * ((ICA - Empty Value) / (Full Value - Empty Value)) x 100% */ + di->rem_capacity = ((di->accum_current_uAh - di->empty_uAh) * 100L) / + (di->full_active_uAh - di->empty_uAh); if (di->rem_capacity < 0) di->rem_capacity = 0; _ Patches currently in -mm which might be from daniel@xxxxxxxx are origin.patch linux-next.patch drivers-misc-isl29003c-driver-for-the-isl29003-ambient-light-sensor.patch drivers-misc-isl29003c-driver-for-the-isl29003-ambient-light-sensor-fix.patch w1-coding-style-cleanups-in-w1_ioc.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html