On 07/19/2018 08:52 AM, Tadeusz Struk wrote: > Currently to read a response from the TPM device an application needs > provide "big enough" buffer for the whole response and read it in one go. > The application doesn't know how big the response it beforehand so it > always needs to maintain a 4K buffer and read the max (4K). > In case if the user of the TSS library doesn't provide big enough buffer > the TCTI spec says that the library should set the required size and return > TSS2_TCTI_RC_INSUFFICIENT_BUFFER error code so that the application could > allocate a bigger buffer and call receive again. > To make it possible in the TSS library this requires being able to do > partial reads from the driver. > The library would read the header first to get the actual size of the > response from the header and then read the rest of the response. > This patch adds support for partial reads. > > The usecase is implemented in this TSS commit: > https://github.com/tpm2-software/tpm2-tss/commit/ce982f67a67dc08e24683d30b05800648d8a264c > > Signed-off-by: Tadeusz Struk <tadeusz.struk@xxxxxxxxx> This needs to go on top of this: https://patchwork.kernel.org/patch/10460863/ Thanks, -- Tadeusz
