On Mon, Apr 08, 2019 at 11:26:18PM +0200, Arnd Bergmann wrote: > 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@xxxxxxxx> I'll never get used to seeing negative numbers assigned to unsigned integers... Reviewed-by: Nathan Chancellor <natechancellor@xxxxxxxxx> > --- > drivers/s390/crypto/zcrypt_api.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/s390/crypto/zcrypt_api.c b/drivers/s390/crypto/zcrypt_api.c > index eb93c2d27d0a..23472063d9a8 100644 > --- a/drivers/s390/crypto/zcrypt_api.c > +++ b/drivers/s390/crypto/zcrypt_api.c > @@ -657,6 +657,7 @@ static long zcrypt_rsa_modexpo(struct ap_perms *perms, > trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO); > > if (mex->outputdatalength < mex->inputdatalength) { > + func_code = -1; > rc = -EINVAL; > goto out; > } > @@ -739,6 +740,7 @@ static long zcrypt_rsa_crt(struct ap_perms *perms, > trace_s390_zcrypt_req(crt, TP_ICARSACRT); > > if (crt->outputdatalength < crt->inputdatalength) { > + func_code = -1; > rc = -EINVAL; > goto out; > } > @@ -946,6 +948,7 @@ static long zcrypt_send_ep11_cprb(struct ap_perms *perms, > > targets = kcalloc(target_num, sizeof(*targets), GFP_KERNEL); > if (!targets) { > + func_code = -1; > rc = -ENOMEM; > goto out; > } > @@ -953,6 +956,7 @@ 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 = -1; > rc = -EFAULT; > goto out_free; > } > -- > 2.20.0 >