[SCSI] I2O: move pci_request_regions() just behind pci_enable_device()

The problem in dpt_i2o could be the pci config space accesses it
triggers as it loads, dangerous to do if there is any I/O activity going
on in the other driver (probable if a boot driver I guess).

I approve this patch to dpt_i2o.c, and am applying it to the Adaptec
branch of the driver.

Thanks for the investigation Ryoji.

---

In linux 2.6.15, data transfer does hang when both dpt_i2o
and i2o_block drivers are loaded.
It seems that location of pci_request_regions() are wrong.
I moved it just behind pci_enable_device() like other drivers,
and it becomes fine.

Signed-off-by: Ryoji Kamei <kamei@miraclelinux.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

2 files changed, 11 insertions, 9 deletions

diff --git a/drivers/message/i2o/pci.c b/drivers/message/i2o/pci.c
index c5b656cdea7c..f23aeea43f62 100644
--- a/drivers/message/i2o/pci.c
+++ b/drivers/message/i2o/pci.c
@@ -88,11 +88,6 @@ static int __devinit i2o_pci_alloc(struct i2o_controller *c)
         struct device *dev = &pdev->dev;
         int i;
 
-        if (pci_request_regions(pdev, OSM_DESCRIPTION)) {
-                printk(KERN_ERR "%s: device already claimed\n", c->name);
-                return -ENODEV;
-        }
-
         for (i = 0; i < 6; i++) {
                 /* Skip I/O spaces */
                 if (!(pci_resource_flags(pdev, i) & IORESOURCE_IO)) {
@@ -319,6 +314,11 @@ static int __devinit i2o_pci_probe(struct pci_dev *pdev,
                 return rc;
         }
 
+        if (pci_request_regions(pdev, OSM_DESCRIPTION)) {
+                printk(KERN_ERR "i2o: device already claimed\n", c->name);
+                return -ENODEV;
+        }
+
         if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
                 printk(KERN_WARNING "i2o: no suitable DMA found for %s\n",
                        pci_name(pdev));
diff --git a/drivers/scsi/dpt_i2o.c b/drivers/scsi/dpt_i2o.c
index cdeb30b0462e..6e6b293dcb28 100644
--- a/drivers/scsi/dpt_i2o.c
+++ b/drivers/scsi/dpt_i2o.c
@@ -899,6 +899,12 @@ static int adpt_install_hba(struct scsi_host_template* sht, struct pci_dev* pDev
         if(pci_enable_device(pDev)) {
                 return -EINVAL;
         }
+
+        if (pci_request_regions(pDev, "dpt_i2o")) {
+                PERROR("dpti: adpt_config_hba: pci request region failed\n");
+                return -EINVAL;
+        }
+
         pci_set_master(pDev);
         if (pci_set_dma_mask(pDev, 0xffffffffffffffffULL) &&
             pci_set_dma_mask(pDev, 0xffffffffULL))
@@ -924,10 +930,6 @@ static int adpt_install_hba(struct scsi_host_template* sht, struct pci_dev* pDev
                 raptorFlag = TRUE;
         }
 
-        if (pci_request_regions(pDev, "dpt_i2o")) {
-                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);