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[SCSI] mpt fusion: lock down ScsiLookup

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ScsiLookup is an array of pending scmd pointers that the scsi lld
maintains. This array is touched from queuecommand, eh threads, and
interrupt context. This array should put under locks, hence this patch
to synchronize its access.  I've added some nice little function
wrappers for this, and moved the ScsiLookup array over to MPT_ADAPTER
struct.

Signed-off-by: Eric Moore <Eric.Moore@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Eric Moore
2007-09-29 10:16:53 -06:00
committed by James Bottomley
parent bc6e089a13
commit e8206381f5
5 changed files with 149 additions and 87 deletions
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7
drivers/message/fusion/mptsas.c
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@@ -3221,15 +3221,16 @@ mptsas_probe(struct pci_dev *pdev, const struct pci_device_id *id)
/* SCSI needs scsi_cmnd lookup table!
* (with size equal to req_depth*PtrSz!)
*/
hd->ScsiLookup = kcalloc(ioc->req_depth, sizeof(void *), GFP_ATOMIC);
if (!hd->ScsiLookup) {
ioc->ScsiLookup = kcalloc(ioc->req_depth, sizeof(void *), GFP_ATOMIC);
if (!ioc->ScsiLookup) {
error = -ENOMEM;
spin_unlock_irqrestore(&ioc->FreeQlock, flags);
goto out_mptsas_probe;
}
spin_lock_init(&ioc->scsi_lookup_lock);
dprintk(ioc, printk(MYIOC_s_DEBUG_FMT "ScsiLookup @ %p\n",
ioc->name, hd->ScsiLookup));
ioc->name, ioc->ScsiLookup));
/* Clear the TM flags
*/