s390/zcrypt: Use EBUSY to indicate temp unavailability

Use -EBUSY instead of -EAGAIN in zcrypt_ccamisc.c
in cases where the CCA card returns 8/2290 to indicate
a temporarily unavailability of this function.

Fixes: ed6776c96c60 ("s390/crypto: remove retry loop with sleep from PAES pkey invocation")
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Ingo Franzki <ifranzki@linux.ibm.com>
Reviewed-by: Holger Dengler <dengler@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>

diff --git a/drivers/s390/crypto/zcrypt_ccamisc.c b/drivers/s390/crypto/zcrypt_ccamisc.c
index 0a3a678..6087547 100644 (file)
--- a/drivers/s390/crypto/zcrypt_ccamisc.c
+++ b/drivers/s390/crypto/zcrypt_ccamisc.c
@@ -658,7 +658,7 @@ int cca_sec2protkey(u16 cardnr, u16 domain,
                               (int)prepcblk->ccp_rtcode,
                               (int)prepcblk->ccp_rscode);
                if (prepcblk->ccp_rtcode == 8 && prepcblk->ccp_rscode == 2290)
-                       rc = -EAGAIN;
+                       rc = -EBUSY;
                else
                        rc = -EIO;
                goto out;
@@ -1263,7 +1263,7 @@ int cca_cipher2protkey(u16 cardnr, u16 domain, const u8 *ckey,
                               (int)prepcblk->ccp_rtcode,
                               (int)prepcblk->ccp_rscode);
                if (prepcblk->ccp_rtcode == 8 && prepcblk->ccp_rscode == 2290)
-                       rc = -EAGAIN;
+                       rc = -EBUSY;
                else
                        rc = -EIO;
                goto out;
@@ -1426,7 +1426,7 @@ int cca_ecc2protkey(u16 cardnr, u16 domain, const u8 *key,
                               (int)prepcblk->ccp_rtcode,
                               (int)prepcblk->ccp_rscode);
                if (prepcblk->ccp_rtcode == 8 && prepcblk->ccp_rscode == 2290)
-                       rc = -EAGAIN;
+                       rc = -EBUSY;
                else
                        rc = -EIO;
                goto out;