[PATCH] Bug 4940 Repeatable Kernel Panic on Adaptec 2015S I20 device on bootup

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Suitable for both 2.4 and 2.6 version of the driver. Applies to
scsi-misc-2.6 git tree.

Prevent driver from loading if another driver (i2o) has already claimed
the resources associated with the card. Discussion associated with this
bug can be referenced at http://bugzilla.kernel.org/show_bug.cgi?id=4940
where it was agreed to use pci_request_regions in both the dpt_i2o and
the i2o driver to prevent both drivers loading on the same adapter(s).

Signed-off-by: Mark Salyzyn <aacraid@xxxxxxxxxxx>

Index: a/drivers/scsi/dpt_i2o.c
===================================================================
--- a/drivers/scsi/dpt_i2o.c	2005-07-26 11:42:03.000000000 -0400
+++ b/drivers/scsi/dpt_i2o.c	2005-08-08 09:50:33.247595544 -0400
@@ -908,8 +908,12 @@
 	}
 
-
+ 	if (pci_request_regions(pDev)) {
+ 		PERROR("dpti: adpt_config_hba: pci request region
failed\n");
+ 		return -EINVAL;
+ 	}
 	base_addr_virt = ioremap(base_addr0_phys,hba_map0_area_size);
 	if (!base_addr_virt) {
+ 		pci_release_regions(pDev);
 		PERROR("dpti: adpt_config_hba: io remap failed\n");
 		return -EINVAL;
 	}
@@ -919,6 +924,7 @@
 		if (!msg_addr_virt) {
 			PERROR("dpti: adpt_config_hba: io remap failed
on BAR1\n");
 			iounmap(base_addr_virt);
+			pci_release_regions(pDev);
 			return -EINVAL;
 		}
 	} else {
@@ -932,6 +938,7 @@
 			iounmap(msg_addr_virt);
 		}
 		iounmap(base_addr_virt);
+		pci_release_regions(pDev);
 		return -ENOMEM;
 	}
 	memset(pHba, 0, sizeof(adpt_hba));
@@ -1027,6 +1034,7 @@
 	up(&adpt_configuration_lock);
 
 	iounmap(pHba->base_addr_virt);
+	pci_release_regions(pHba->pDev);
 	if(pHba->msg_addr_virt != pHba->base_addr_virt){
 		iounmap(pHba->msg_addr_virt);
 	}

Sincerely -- Mark Salyzyn
-
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