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[SCSI] a100u2w: fix bitmap lookup routine 

This patch is only compile tested.

It seems that bitmap lookup routine for allocation_map in
a100u2w driver is simply wrong.

It cannot lookup more than first 32 bits. If all first 32 bits
are set, it just returns 33-th orc_scb even though the 33-th bit
is not set.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Tested-by: Alan Cox <alan@redhat.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Akinobu Mita 2008-03-17 21:32:02 +09:00 committed by James Bottomley
parent 4d1566ed21
commit 28aef2f7d9
1 changed files with 5 additions and 4 deletions
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9
drivers/scsi/a100u2w.c
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@ -674,12 +674,13 @@ static struct orc_scb *__orc_alloc_scb(struct orc_host * host)
for (index = 0; index < 32; index++) {
if ((host->allocation_map[channel][i] >> index) & 0x01) {
host->allocation_map[channel][i] &= ~(1 << index);
break;
idx = index + 32 * i;
/*
* Translate the index to a structure instance
*/
return host->scb_virt + idx;
}
}
idx = index + 32 * i;
/* Translate the index to a structure instance */
return (struct orc_scb *) ((unsigned long) host->scb_virt + (idx * sizeof(struct orc_scb)));
}
return NULL;
}