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[S390] dasd: use idal for device characteristics

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If the rdc_buffer is above 2G we need indirect addresssing so we have
to use an idaw to give the rdc_buffer to the ccw.
If the rdc_buffer is under 2G nothing changes.

Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Stefan Haberland 2009-10-14 12:43:48 +02:00 committed by Martin Schwidefsky
parent be6e3f9cd6
commit d9fa9441ed
1 changed files with 11 additions and 2 deletions
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11
drivers/s390/block/dasd.c
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@ -2533,6 +2533,7 @@ static struct dasd_ccw_req *dasd_generic_build_rdc(struct dasd_device *device,
{ {
struct dasd_ccw_req *cqr; struct dasd_ccw_req *cqr;
struct ccw1 *ccw; struct ccw1 *ccw;
unsigned long *idaw;
cqr = dasd_smalloc_request(magic, 1 /* RDC */, rdc_buffer_size, device); cqr = dasd_smalloc_request(magic, 1 /* RDC */, rdc_buffer_size, device);
@ -2546,9 +2547,17 @@ static struct dasd_ccw_req *dasd_generic_build_rdc(struct dasd_device *device,
ccw = cqr->cpaddr; ccw = cqr->cpaddr;
ccw->cmd_code = CCW_CMD_RDC; ccw->cmd_code = CCW_CMD_RDC;
if (idal_is_needed(rdc_buffer, rdc_buffer_size)) {
idaw = (unsigned long *) (cqr->data);
ccw->cda = (__u32)(addr_t) idaw;
ccw->flags = CCW_FLAG_IDA;
idaw = idal_create_words(idaw, rdc_buffer, rdc_buffer_size);
} else {
ccw->cda = (__u32)(addr_t) rdc_buffer; ccw->cda = (__u32)(addr_t) rdc_buffer;
ccw->count = rdc_buffer_size; ccw->flags = 0;
}
ccw->count = rdc_buffer_size;
cqr->startdev = device; cqr->startdev = device;
cqr->memdev = device; cqr->memdev = device;
cqr->expires = 10*HZ; cqr->expires = 10*HZ;