optee: fix uninited async notif value
Fixes an uninitialized variable in irq_handler() that could lead to
unpredictable behavior in case OP-TEE fails to handle SMC function ID
OPTEE_SMC_GET_ASYNC_NOTIF_VALUE. This change ensures that in that case
get_async_notif_value() properly reports there are no notification
event.
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/202304200755.OoiuclDZ-lkp@intel.com/
Reported-by: Dan Carpenter <error27@gmail.com>
Link: https://lore.kernel.org/all/d9b7f69b-c737-4cb3-8e74-79fe00c934f9@kili.mountain/
Fixes: 6749e69c4d
("optee: add asynchronous notifications")
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
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@ -984,8 +984,10 @@ static u32 get_async_notif_value(optee_invoke_fn *invoke_fn, bool *value_valid,
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invoke_fn(OPTEE_SMC_GET_ASYNC_NOTIF_VALUE, 0, 0, 0, 0, 0, 0, 0, &res);
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if (res.a0)
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if (res.a0) {
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*value_valid = false;
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return 0;
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}
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*value_valid = (res.a2 & OPTEE_SMC_ASYNC_NOTIF_VALUE_VALID);
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*value_pending = (res.a2 & OPTEE_SMC_ASYNC_NOTIF_VALUE_PENDING);
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return res.a1;
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