s390/zcrypt: Avoid alloc and copy of ep11 targets if kernelspace cprb

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If there is a target list of APQNs given when an CPRB is
to be send via zcrypt_send_ep11_cprb() there is always a
kmalloc() done and the targets are copied via z_copy_from_user.

As there are callers from kernel space (zcrypt_ep11misc.c)
which signal this via the userspace parameter improve this
code to directly use the given target list in case of
kernelspace thus removing the unnecessary memory alloc
and mem copy.

Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Holger Dengler <dengler@linux.ibm.com>
Link: https://lore.kernel.org/r/20250424133619.16495-5-freude@linux.ibm.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

...

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Harald Freudenberger 2025-04-24 15:35:58 +02:00 • committed by Heiko Carstens

parent dcc160b3a0

commit f91bb85d39

1 changed files with 19 additions and 23 deletions

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drivers/s390/crypto/zcrypt_api.c

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