[PATCH] tpm: tis_infineon: Cannot test unsigned for being negative

[Andrew Goodbody]

tpm_tis_i2c_get_burstcount returns a size_t but also returns -EBUSY if
the TPM is surrently busy. As size_t is an unsigned type simply testing
for < 0 will not work so change the test for being equal to -EBUSY which
will work. Also remove the trivial comments.

This issue was found by Smatch.

Signed-off-by: Andrew Goodbody <andrew.goodbody at linaro.org>
---
 drivers/tpm/tpm_tis_infineon.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/tpm/tpm_tis_infineon.c b/drivers/tpm/tpm_tis_infineon.c
index e2f6238cbc7..180bcf4f938 100644
--- a/drivers/tpm/tpm_tis_infineon.c
+++ b/drivers/tpm/tpm_tis_infineon.c
@@ -353,8 +353,7 @@ static int tpm_tis_i2c_recv_data(struct udevice *dev, u8 *buf, size_t count)
 	while (size < count) {
 		burstcnt = tpm_tis_i2c_get_burstcount(dev);
 
-		/* burstcount < 0 -> tpm is busy */
-		if (burstcnt < 0)
+		if (burstcnt == -EBUSY)
 			return burstcnt;
 
 		/* Limit received data to max left */
@@ -449,8 +448,7 @@ static int tpm_tis_i2c_send(struct udevice *dev, const u8 *buf, size_t len)
 
 	burstcnt = tpm_tis_i2c_get_burstcount(dev);
 
-	/* burstcount < 0 -> tpm is busy */
-	if (burstcnt < 0)
+	if (burstcnt == -EBUSY)
 		return burstcnt;
 
 	while (count < len) {

---
base-commit: 7807ed921314cd7af83fd88162d0b8c6fb20a9ca
change-id: 20250813-tpm_tis_infineon-62014a7e6158

Best regards,
-- 
Andrew Goodbody <andrew.goodbody at linaro.org>