tree 87ff18a42db88a9810071264b0ed5d17a96f6132
parent ee9bdfedd3dc1b3303390663189defa4d6b9e458
author Will Deacon <will@kernel.org> 1572883095 +0000
committer Will Deacon <will@kernel.org> 1572889688 +0000

firmware: qcom: scm: Ensure 'a0' status code is treated as signed

The 'a0' member of 'struct arm_smccc_res' is declared as 'unsigned long',
however the Qualcomm SCM firmware interface driver expects to receive
negative error codes via this field, so ensure that it's cast to 'long'
before comparing to see if it is less than 0.

Cc: <stable@vger.kernel.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Will Deacon <will@kernel.org>