[SCSI] aacraid: prevent panic on adapter resource failure

If the driver fails to allocate the contiguous (DMAable) memory for
system reasons, we fail to load the instance, but then we try to free
the <nul> allocation in the cleanup code and we get a panic in
pci_free_consistent(). This is reported against an older kernel, hope
this is relevant for latest/greatest.

Signed-off-by: Mark Salyzyn <aacraid@adaptec.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index 813556c60007de5c1e1afde58c721048b34fa58a..a7f42a17b5c708ba331b59874690f8a84cdab920 100644 (file)
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -1110,7 +1110,9 @@ static int __devinit aac_probe_one(struct pci_dev *pdev,
        __aac_shutdown(aac);
  out_unmap:
        aac_fib_map_free(aac);
-       pci_free_consistent(aac->pdev, aac->comm_size, aac->comm_addr, aac->comm_phys);
+       if (aac->comm_addr)
+               pci_free_consistent(aac->pdev, aac->comm_size, aac->comm_addr,
+                 aac->comm_phys);
        kfree(aac->queues);
        aac_adapter_ioremap(aac, 0);
        kfree(aac->fibs);