[S390] dasd: tunable missing interrupt handler
This feature provides a user interface to specify the timeout for
missing interrupts for standard I/O operations.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 0483b2e..66360c2 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -1115,8 +1115,9 @@
struct dasd_eckd_private *private;
struct dasd_block *block;
struct dasd_uid temp_uid;
- int is_known, rc;
+ int is_known, rc, i;
int readonly;
+ unsigned long value;
if (!ccw_device_is_pathgroup(device->cdev)) {
dev_warn(&device->cdev->dev,
@@ -1151,6 +1152,18 @@
if (rc)
goto out_err1;
+ /* set default timeout */
+ device->default_expires = DASD_EXPIRES;
+ if (private->gneq) {
+ value = 1;
+ for (i = 0; i < private->gneq->timeout.value; i++)
+ value = 10 * value;
+ value = value * private->gneq->timeout.number;
+ /* do not accept useless values */
+ if (value != 0 && value <= DASD_EXPIRES_MAX)
+ device->default_expires = value;
+ }
+
/* Generate device unique id */
rc = dasd_eckd_generate_uid(device);
if (rc)
@@ -1981,7 +1994,7 @@
cqr->startdev = startdev;
cqr->memdev = startdev;
cqr->block = block;
- cqr->expires = 5 * 60 * HZ; /* 5 minutes */
+ cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
cqr->lpm = private->path_data.ppm;
cqr->retries = 256;
cqr->buildclk = get_clock();
@@ -2158,7 +2171,7 @@
cqr->startdev = startdev;
cqr->memdev = startdev;
cqr->block = block;
- cqr->expires = 5 * 60 * HZ; /* 5 minutes */
+ cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
cqr->lpm = private->path_data.ppm;
cqr->retries = 256;
cqr->buildclk = get_clock();
@@ -2406,7 +2419,7 @@
cqr->startdev = startdev;
cqr->memdev = startdev;
cqr->block = block;
- cqr->expires = 5 * 60 * HZ; /* 5 minutes */
+ cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
cqr->lpm = private->path_data.ppm;
cqr->retries = 256;
cqr->buildclk = get_clock();