From ac994e80f94f440138774830f2edf148d6ece1f3 Mon Sep 17 00:00:00 2001 From: Harald Freudenberger Date: Fri, 12 May 2017 16:35:14 +0200 Subject: s390/zcrypt: Rework ap init in case of out of range domain param. When a out of range domain parameter was given, the init function returned with -EINVAL and the driver was not operational. As the driver is statically build into the kernel and is able to work with multiple domains anyway the init function should continue. Now the user has a chance to write a new default domain value via sysfs attribute file. Also added two new dbf debug messages related to the domain value handling. Signed-off-by: Harald Freudenberger Signed-off-by: Martin Schwidefsky --- drivers/s390/crypto/ap_bus.c | 21 +++++++++++++++------ 1 file changed, 15 insertions(+), 6 deletions(-) diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c index ea099910b4e9..6dee598979e7 100644 --- a/drivers/s390/crypto/ap_bus.c +++ b/drivers/s390/crypto/ap_bus.c @@ -766,7 +766,7 @@ static ssize_t ap_domain_store(struct bus_type *bus, ap_domain_index = domain; spin_unlock_bh(&ap_domain_lock); - AP_DBF(DBF_DEBUG, "store new default domain=%d\n", domain); + AP_DBF(DBF_DEBUG, "stored new default domain=%d\n", domain); return count; } @@ -952,6 +952,7 @@ static int ap_select_domain(void) } if (best_domain >= 0){ ap_domain_index = best_domain; + AP_DBF(DBF_DEBUG, "new ap_domain_index=%d\n", ap_domain_index); spin_unlock_bh(&ap_domain_lock); return 0; } @@ -988,7 +989,7 @@ static void ap_scan_bus(struct work_struct *unused) ap_qid_t qid; int depth = 0, type = 0; unsigned int functions = 0; - int rc, id, dom, borked, domains; + int rc, id, dom, borked, domains, defdomdevs = 0; AP_DBF(DBF_DEBUG, "ap_scan_bus running\n"); @@ -1052,6 +1053,8 @@ static void ap_scan_bus(struct work_struct *unused) put_device(dev); if (!borked) { domains++; + if (dom == ap_domain_index) + defdomdevs++; continue; } } @@ -1098,6 +1101,8 @@ static void ap_scan_bus(struct work_struct *unused) continue; } domains++; + if (dom == ap_domain_index) + defdomdevs++; } /* end domain loop */ if (ac) { /* remove card dev if there are no queue devices */ @@ -1106,6 +1111,11 @@ static void ap_scan_bus(struct work_struct *unused) put_device(&ac->ap_dev.device); } } /* end device loop */ + + if (defdomdevs < 1) + AP_DBF(DBF_INFO, "no queue device with default domain %d available\n", + ap_domain_index); + out: mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ); } @@ -1174,14 +1184,14 @@ int __init ap_module_init(void) ap_init_configuration(); if (ap_configuration) - max_domain_id = ap_max_domain_id ? : (AP_DOMAINS - 1); + max_domain_id = + ap_max_domain_id ? ap_max_domain_id : AP_DOMAINS - 1; else max_domain_id = 15; if (ap_domain_index < -1 || ap_domain_index > max_domain_id) { pr_warn("%d is not a valid cryptographic domain\n", ap_domain_index); - rc = -EINVAL; - goto out_free; + ap_domain_index = -1; } /* In resume callback we need to know if the user had set the domain. * If so, we can not just reset it. @@ -1254,7 +1264,6 @@ out: unregister_reset_call(&ap_reset_call); if (ap_using_interrupts()) unregister_adapter_interrupt(&ap_airq); -out_free: kfree(ap_configuration); return rc; } -- cgit v1.2.3