Merge tag 'tpm-next-01072025' of https://source.denx.de/u-boot/custodians/u-boot-tpm into next

CI: https://source.denx.de/u-boot/custodians/u-boot-tpm/-/pipelines/26897

Updates from Andrew fixing issues reported by smatch.  It picked up
cases of enum functions returning integers instead of enum values.

cmd/tpm-v2.c

@@ -113,7 +113,7 @@ static int do_tpm2_pcr_extend(struct cmd_tbl *cmdtp, int flag, int argc,
 		return CMD_RET_USAGE;
 	if (argc == 4) {
 		algo = tpm2_name_to_algorithm(argv[3]);
-		if (algo < 0)
+		if (algo == TPM2_ALG_INVAL)
 			return CMD_RET_FAILURE;
 	}
 	algo_len = tpm2_algorithm_to_len(algo);
@@ -157,7 +157,7 @@ static int do_tpm_pcr_read(struct cmd_tbl *cmdtp, int flag, int argc,
 		return CMD_RET_USAGE;
 	if (argc == 4) {
 		algo = tpm2_name_to_algorithm(argv[3]);
-		if (algo < 0)
+		if (algo == TPM2_ALG_INVAL)
 			return CMD_RET_FAILURE;
 	}
 	algo_len = tpm2_algorithm_to_len(algo);
@@ -288,7 +288,7 @@ static int do_tpm2_pcrallocate(struct cmd_tbl *cmdtp, int flag, int argc,
 		return CMD_RET_USAGE;
 
 	algo = tpm2_name_to_algorithm(argv[1]);
-	if (algo == -EINVAL)
+	if (algo == TPM2_ALG_INVAL)
 		return CMD_RET_USAGE;
 
 	ret = get_tpm(&dev);

include/tpm-v2.h

@@ -20,6 +20,7 @@
 #define __TPM_V2_H
 
 #include <tpm-common.h>
+#include <linux/errno.h>
 
 struct udevice;
 
@@ -266,6 +267,7 @@ enum tpm2_return_codes {
  * TPM2 algorithms.
  */
 enum tpm2_algorithms {
+	TPM2_ALG_INVAL		= -EINVAL,
 	TPM2_ALG_SHA1		= 0x04,
 	TPM2_ALG_XOR		= 0x0A,
 	TPM2_ALG_SHA256		= 0x0B,

lib/tpm-v2.c

@@ -1141,7 +1141,7 @@ enum tpm2_algorithms tpm2_name_to_algorithm(const char *name)
 	}
 	printf("%s: unsupported algorithm %s\n", __func__, name);
 
-	return -EINVAL;
+	return TPM2_ALG_INVAL;
 }
 
 const char *tpm2_algorithm_name(enum tpm2_algorithms algo)