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authorBorislav Petkov <bp@suse.de>2016-06-01 11:36:13 +0200
committerGuenter Roeck <linux@roeck-us.net>2016-06-07 20:11:10 -0700
commit7be4881846cfa67f968eaf5b7b50d9623a652afb (patch)
tree7c3df09b338f35577e58c44421e1d2e20795816a /Documentation/devicetree
parentaf8c34ce6ae32addda3788d54a7e340cad22516b (diff)
downloadlinux-7be4881846cfa67f968eaf5b7b50d9623a652afb.tar.gz
hwmon: (fam15h_power) Disable preemption when reading registers
We need to read a bunch of registers on each compute unit and possibly on the current CPU too. Disable preemption around it. Otherwise, you get: BUG: using smp_processor_id() in preemptible [00000000] code: systemd-udevd/327 caller is read_registers+0x6a/0x110 [fam15h_power] CPU: 3 PID: 327 Comm: systemd-udevd Not tainted 4.7.0-rc1+ #4 Hardware name: HP HP EliteBook 745 G3/807E, BIOS N73 Ver. 01.08 01/28/2016 ... Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Rui Huang <ray.huang@amd.com> Cc: Sherry Hurwitz <sherry.hurwitz@amd.com> Cc: Guenter Roeck <linux@roeck-us.net> Acked-by: Huang Rui <ray.huang@amd.com> Tested-by: Huang Rui <ray.huang@amd.com> Fixes: fa7943449943 ("hwmon: (fam15h_power) Add compute unit accumulated power") Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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