load_fw: The firmware loading loop terminates prematurely #555
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The remoteproc_load_noblock() is a non-blocking API designed to load the remote firmware in streaming mode. The application has to continue supplying the firmware data blocks until the complete firmware is loaded. The load_fw example does this and checks the `nlen` variable (returned by the remoteproc_load_noblock() API) for zero to determine if the firmware loading is complete. However, `nlen` (contains the filesize of the next program header) alone can't be taken as the sufficient condition to mark the completion of firmware loading as 0 is a valid value for filesize for sections that don't require loading to the target memory such as the .bss section. This patch proposes checking filesize as well as memsize as a better metric to mark completion of the firmware loading loop. Signed-off-by: Umair Khan <[email protected]>
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The remoteproc_load_noblock() is a non-blocking API designed to load the remote firmware in streaming mode. The application has to continue supplying the firmware data blocks until the complete firmware is loaded. The load_fw example does this and checks the
nlenvariable (returned by the remoteproc_load_noblock() API) for zero to determine if the firmware loading is complete. However,nlen(contains the filesize of the next program header) alone can't be taken as the sufficient condition to mark the completion of firmware loading as 0 is a valid value for filesize for sections that don't require loading to the target memory such as the .bss section. This patch proposes checking filesize as well as memsize as a better metric to mark completion of the firmware loading loop.