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authorRalph Wuerthner <rwuerthn@de.ibm.com>2007-07-10 11:24:19 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2007-07-10 11:24:52 +0200
commitaf512ed0f8a7e6a3c6fd93b2b5882c8e837a6939 (patch)
tree2bd15176832b8c6eb671519334d9e1ab5d994d68 /drivers/s390/crypto/zcrypt_cex2a.c
parent987ad70a4d90cf0e70dba43ece02c2e2219e092c (diff)
downloadop-kernel-dev-af512ed0f8a7e6a3c6fd93b2b5882c8e837a6939.zip
op-kernel-dev-af512ed0f8a7e6a3c6fd93b2b5882c8e837a6939.tar.gz
[S390] zcrypt: fix request timeout handling
Under very high load zcrypt requests may timeout while waiting on the request queue. Modify zcrypt that timeouts are based on crypto adapter responses. A timeout occurs only if a crypto adapter does not respond within a given time frame to sumitted requests. Signed-off-by: Ralph Wuerthner <rwuerthn@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/crypto/zcrypt_cex2a.c')
-rw-r--r--drivers/s390/crypto/zcrypt_cex2a.c27
1 files changed, 9 insertions, 18 deletions
diff --git a/drivers/s390/crypto/zcrypt_cex2a.c b/drivers/s390/crypto/zcrypt_cex2a.c
index 5bb13a9..08657f6 100644
--- a/drivers/s390/crypto/zcrypt_cex2a.c
+++ b/drivers/s390/crypto/zcrypt_cex2a.c
@@ -70,6 +70,7 @@ static struct ap_driver zcrypt_cex2a_driver = {
.remove = zcrypt_cex2a_remove,
.receive = zcrypt_cex2a_receive,
.ids = zcrypt_cex2a_ids,
+ .request_timeout = CEX2A_CLEANUP_TIME,
};
/**
@@ -306,18 +307,13 @@ static long zcrypt_cex2a_modexpo(struct zcrypt_device *zdev,
goto out_free;
init_completion(&work);
ap_queue_message(zdev->ap_dev, &ap_msg);
- rc = wait_for_completion_interruptible_timeout(
- &work, CEX2A_CLEANUP_TIME);
- if (rc > 0)
+ rc = wait_for_completion_interruptible(&work);
+ if (rc == 0)
rc = convert_response(zdev, &ap_msg, mex->outputdata,
mex->outputdatalength);
- else {
- /* Signal pending or message timed out. */
+ else
+ /* Signal pending. */
ap_cancel_message(zdev->ap_dev, &ap_msg);
- if (rc == 0)
- /* Message timed out. */
- rc = -ETIME;
- }
out_free:
kfree(ap_msg.message);
return rc;
@@ -348,18 +344,13 @@ static long zcrypt_cex2a_modexpo_crt(struct zcrypt_device *zdev,
goto out_free;
init_completion(&work);
ap_queue_message(zdev->ap_dev, &ap_msg);
- rc = wait_for_completion_interruptible_timeout(
- &work, CEX2A_CLEANUP_TIME);
- if (rc > 0)
+ rc = wait_for_completion_interruptible(&work);
+ if (rc == 0)
rc = convert_response(zdev, &ap_msg, crt->outputdata,
crt->outputdatalength);
- else {
- /* Signal pending or message timed out. */
+ else
+ /* Signal pending. */
ap_cancel_message(zdev->ap_dev, &ap_msg);
- if (rc == 0)
- /* Message timed out. */
- rc = -ETIME;
- }
out_free:
kfree(ap_msg.message);
return rc;
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