diff options
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/block/dasd_diag.c | 50 |
1 files changed, 30 insertions, 20 deletions
diff --git a/drivers/s390/block/dasd_diag.c b/drivers/s390/block/dasd_diag.c index 9aa608f528e..ab8754e566b 100644 --- a/drivers/s390/block/dasd_diag.c +++ b/drivers/s390/block/dasd_diag.c @@ -6,7 +6,7 @@ * Bugreports.to..: <Linux390@de.ibm.com> * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000 * - * $Revision: 1.50 $ + * $Revision: 1.51 $ */ #include <linux/config.h> @@ -404,37 +404,47 @@ dasd_diag_check_device(struct dasd_device *device) private->iob.bio_list = &bio; private->iob.flaga = DASD_DIAG_FLAGA_DEFAULT; rc = dia250(&private->iob, RW_BIO); - if (rc == 0 || rc == 3) - break; + if (rc == 3) { + DEV_MESSAGE(KERN_WARNING, device, "%s", + "DIAG call failed"); + rc = -EOPNOTSUPP; + goto out; + } mdsk_term_io(device); + if (rc == 0) + break; } - if (rc == 3) { - DEV_MESSAGE(KERN_WARNING, device, "%s", "DIAG call failed"); - rc = -EOPNOTSUPP; - } else if (rc != 0) { + if (bsize > PAGE_SIZE) { DEV_MESSAGE(KERN_WARNING, device, "device access failed " "(rc=%d)", rc); rc = -EIO; + goto out; + } + /* check for label block */ + if (memcmp(label->label_id, DASD_DIAG_CMS1, + sizeof(DASD_DIAG_CMS1)) == 0) { + /* get formatted blocksize from label block */ + bsize = (unsigned int) label->block_size; + device->blocks = (unsigned long) label->block_count; + } else + device->blocks = end_block; + device->bp_block = bsize; + device->s2b_shift = 0; /* bits to shift 512 to get a block */ + for (sb = 512; sb < bsize; sb = sb << 1) + device->s2b_shift++; + rc = mdsk_init_io(device, device->bp_block, 0, NULL); + if (rc) { + DEV_MESSAGE(KERN_WARNING, device, "DIAG initialization " + "failed (rc=%d)", rc); + rc = -EIO; } else { - if (memcmp(label->label_id, DASD_DIAG_CMS1, - sizeof(DASD_DIAG_CMS1)) == 0) { - /* get formatted blocksize from label block */ - bsize = (unsigned int) label->block_size; - device->blocks = (unsigned long) label->block_count; - } else - device->blocks = end_block; - device->bp_block = bsize; - device->s2b_shift = 0; /* bits to shift 512 to get a block */ - for (sb = 512; sb < bsize; sb = sb << 1) - device->s2b_shift++; - DEV_MESSAGE(KERN_INFO, device, "(%ld B/blk): %ldkB", (unsigned long) device->bp_block, (unsigned long) (device->blocks << device->s2b_shift) >> 1); - rc = 0; } +out: free_page((long) label); return rc; } |