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SCPI fix for v4.10 

A simple fix for reading only lower 32-bit sensor values on pre-1.0 SCPI
 firmwares so that upper 32-bit (garbage) value is discarded properly.
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Merge tag 'scpi-fixes-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into fixes

Pull "SCPI fix for v4.10" from Sudeep Holla:

A simple fix for reading only lower 32-bit sensor values on pre-1.0 SCPI
firmwares so that upper 32-bit (garbage) value is discarded properly.

* tag 'scpi-fixes-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux:
  firmware: arm_scpi: fix reading sensor values on pre-1.0 SCPI firmwares
This commit is contained in:
Arnd Bergmann 2017-01-04 16:18:38 +01:00
parent ad040d8df6 a766347b15
commit 43a8df78dc
1 changed files with 8 additions and 2 deletions
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10
drivers/firmware/arm_scpi.c
View File

@ -721,11 +721,17 @@ static int scpi_sensor_get_value(u16 sensor, u64 *val)
ret = scpi_send_message(CMD_SENSOR_VALUE, &id, sizeof(id),
&buf, sizeof(buf));
if (!ret)
if (ret)
return ret;
if (scpi_info->is_legacy)
/* only 32-bits supported, hi_val can be junk */
*val = le32_to_cpu(buf.lo_val);
else
*val = (u64)le32_to_cpu(buf.hi_val) << 32 |
le32_to_cpu(buf.lo_val);
return ret;
return 0;
}
static int scpi_device_get_power_state(u16 dev_id)