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| H A D | thread_spmc.c | 7f127d42b9cdc2bce242263e845d6a3ff17261b7 Mon May 23 08:39:35 UTC 2022 Jens Wiklander <jens.wiklander@linaro.org> core: arm: S-EL1 SPMC: fix handling of fragmented memory descriptors
Prior to this commit there was a misunderstanding of how fragmented
memory descriptors are handled. FFA_MEM_SHARE returned FFA_SUCCESS even
when another fragment was expected. FFA_MEM_FRAG_TX returned
FFA_MEM_FRAG_RX even after the last fragment was received.
Fix this by only return FFA_SUCCESS from FFA_MEM_SHARE if the entire
descriptor has been received. If only the first fragment has been
received return FFA_MEM_FRAG_RX instead. Only return FFA_MEM_FRAG_RX
from FFA_MEM_FRAG_TX if further fragments are expected. Return
FFA_SUCCESS from FFA_MEM_FRAG_RX when then entire descriptor has been
received.
Fixes: 1b302ac09816 ("core: enable FF-A with SPM Core at S-EL1")
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
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