From: Salyzyn, Mark Date: Thu, 12 Jan 2006 13:31:57 +0000 (-0500) Subject: [SCSI] I2O: move pci_request_regions() just behind pci_enable_device() X-Git-Tag: v2.6.16-rc1~162^2~37 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9638d89a75776abc614c29cdeece0cc874ea2a4c;p=linux-2.6 [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 Signed-off-by: James Bottomley --- diff --git a/drivers/message/i2o/pci.c b/drivers/message/i2o/pci.c index c5b656cdea..f23aeea43f 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 cdeb30b046..6e6b293dcb 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);