From b5185ea1a6bd35957e556129bb92a64f83aa65e4 Mon Sep 17 00:00:00 2001 From: Harald Freudenberger Date: Wed, 21 May 2025 10:01:18 +0200 Subject: [PATCH] s390/crypto: Extend protected key conversion retry loop CI runs show that the protected key conversion retry loop runs into timeout if a master key change was initiated on the addressed crypto resource shortly before the conversion request. This patch extends the retry logic to run in total 5 attempts with increasing delay (200, 400, 800 and 1600 ms) in case of a busy card. Signed-off-by: Harald Freudenberger Reviewed-by: Ingo Franzki Signed-off-by: Heiko Carstens --- arch/s390/crypto/paes_s390.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/arch/s390/crypto/paes_s390.c b/arch/s390/crypto/paes_s390.c index 47f5ce7904f87..8a340c16acb46 100644 --- a/arch/s390/crypto/paes_s390.c +++ b/arch/s390/crypto/paes_s390.c @@ -199,8 +199,11 @@ static inline int convert_key(const u8 *key, unsigned int keylen, pk->len = sizeof(pk->protkey); - /* try three times in case of busy card */ - for (rc = -EIO, i = 0; rc && i < 3; i++) { + /* + * In case of a busy card retry with increasing delay + * of 200, 400, 800 and 1600 ms - in total 3 s. + */ + for (rc = -EIO, i = 0; rc && i < 5; i++) { if (rc == -EBUSY && msleep_interruptible((1 << i) * 100)) { rc = -EINTR; goto out; -- 2.47.3