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s390: zcrypt: initialize variables before_use 

The 'func_code' variable gets printed in debug statements without
a prior initialization in multiple functions, as reported when building
with clang:

drivers/s390/crypto/zcrypt_api.c:659:6: warning: variable 'func_code' is used uninitialized whenever 'if' condition is true
      [-Wsometimes-uninitialized]
        if (mex->outputdatalength < mex->inputdatalength) {
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/s390/crypto/zcrypt_api.c:725:29: note: uninitialized use occurs here
        trace_s390_zcrypt_rep(mex, func_code, rc,
                                   ^~~~~~~~~
drivers/s390/crypto/zcrypt_api.c:659:2: note: remove the 'if' if its condition is always false
        if (mex->outputdatalength < mex->inputdatalength) {
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/s390/crypto/zcrypt_api.c:654:24: note: initialize the variable 'func_code' to silence this warning
        unsigned int func_code;
                              ^

Add initializations to all affected code paths to shut up the warning
and make the warning output consistent.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Arnd Bergmann 2019-04-08 23:26:18 +02:00 committed by Martin Schwidefsky
parent 6e042492a2
commit 913140e221
1 changed files with 4 additions and 0 deletions
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4
drivers/s390/crypto/zcrypt_api.c
View File

@ -659,6 +659,7 @@ static long zcrypt_rsa_modexpo(struct ap_perms *perms,
trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
if (mex->outputdatalength < mex->inputdatalength) {
func_code = 0;
rc = -EINVAL;
goto out;
}
@ -742,6 +743,7 @@ static long zcrypt_rsa_crt(struct ap_perms *perms,
trace_s390_zcrypt_req(crt, TP_ICARSACRT);
if (crt->outputdatalength < crt->inputdatalength) {
func_code = 0;
rc = -EINVAL;
goto out;
}
@ -951,6 +953,7 @@ static long zcrypt_send_ep11_cprb(struct ap_perms *perms,
targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL);
if (!targets) {
func_code = 0;
rc = -ENOMEM;
goto out;
}
@ -958,6 +961,7 @@ static long zcrypt_send_ep11_cprb(struct ap_perms *perms,
uptr = (struct ep11_target_dev __force __user *) xcrb->targets;
if (copy_from_user(targets, uptr,
target_num * sizeof(*targets))) {
func_code = 0;
rc = -EFAULT;
goto out_free;
}