tpm: Fix comparison of unsigned expression warning

The function tpm_xfer returns int so make 'err' be int rather than
uint32_t so that we can catch an error condition.  Reported by
clang-3.8.

Signed-off-by: Tom Rini <trini@konsulko.com>

diff --git a/lib/tpm.c b/lib/tpm.c
index cd7f88f2204e9119f0b24b6a7b98cdd1e441a193..fb520e3d733ca4bfe813efd34827adaae283a2ec 100644 (file)
--- a/lib/tpm.c
+++ b/lib/tpm.c
@@ -230,10 +230,9 @@ static uint32_t tpm_sendrecv_command(const void *command,
                void *response, size_t *size_ptr)
 {
        struct udevice *dev;
-       int ret;
+       int err, ret;
        uint8_t response_buffer[COMMAND_BUFFER_SIZE];
        size_t response_length;
-       uint32_t err;
 
        if (response) {
                response_length = *size_ptr;