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| author |   Ralph Wuerthner <rwuerthn@de.ibm.com> | 2007-07-10 11:24:19 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2007-07-10 11:24:52 +0200 |
| commit | af512ed0f8a7e6a3c6fd93b2b5882c8e837a6939 (patch) | |
| tree | 2bd15176832b8c6eb671519334d9e1ab5d994d68 /drivers/s390/crypto/zcrypt_pcica.c | |
| parent | [S390] system call optimization. (diff) | |
| download | linux-dev-af512ed0f8a7e6a3c6fd93b2b5882c8e837a6939.tar.xz linux-dev-af512ed0f8a7e6a3c6fd93b2b5882c8e837a6939.zip | |
[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_pcica.c')
| -rw-r--r-- | drivers/s390/crypto/zcrypt_pcica.c | 27 |
1 files changed, 9 insertions, 18 deletions
diff --git a/drivers/s390/crypto/zcrypt_pcica.c b/drivers/s390/crypto/zcrypt_pcica.c index 818ffe05ac00..6e93b4751782 100644 --- a/drivers/s390/crypto/zcrypt_pcica.c +++ b/drivers/s390/crypto/zcrypt_pcica.c @@ -70,6 +70,7 @@ static struct ap_driver zcrypt_pcica_driver = { .remove = zcrypt_pcica_remove, .receive = zcrypt_pcica_receive, .ids = zcrypt_pcica_ids, + .request_timeout = PCICA_CLEANUP_TIME, }; /** @@ -290,18 +291,13 @@ static long zcrypt_pcica_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, PCICA_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; @@ -332,18 +328,13 @@ static long zcrypt_pcica_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, PCICA_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; |