s390/crypto: Map EBUSY to EIO when key conversion fails repeatedly

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When hardware persistently returns -EBUSY after exhausting retries,
the error propagates to crypto_finalize_*_request(). The crypto API's
completion wrapper treats -EBUSY as a queueing status and swallows it,
preventing the completion callback from firing. This causes callers
using crypto_wait_req() to block indefinitely.

Translate persistent -EBUSY to -EIO after retry exhaustion to ensure
proper error propagation and callback invocation.

Fixes: 6cd87cb5ef ("s390/crypto: Rework protected key AES for true asynch support")
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Holger Dengler <dengler@linux.ibm.com>
Cc: stable@vger.kernel.org # 6.16+
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

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Harald Freudenberger 2026-08-31 10:38:37 +02:00 • committed by Vasily Gorbik

parent ac14813201

commit 7a08507ea5

2 changed files with 8 additions and 0 deletions

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arch/s390/crypto/paes_s390.c

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4

arch/s390/crypto/phmac_s390.c

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