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468fa450a7
Currently, read/writes are broken down into individual bytes which result in many function calls. This is quite bad for performance and since both the layer below and above work with larger buffers, it should be corrected. This patch is the first that switches the corresponding interface over to use a buf+len instead of a single byte. However, for most cases the implementation still only reads one byte and is then called again with the remaining buffer. Optimizations taking advantage of this new interface are to follow in the next commits. Signed-off-by: Christian Speich <c.speich@avm.de> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-ID: <20260417-sdcard-performance-b4-v4-1-119e66be10c2@avm.de> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>