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

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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>

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Will Deacon 2019-11-04 15:58:15 +00:00

parent ee9bdfedd3

commit ff34f3cce2

1 changed files with 1 additions and 1 deletions

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drivers/firmware/qcom_scm-64.c

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