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| author | Al Viro <viro@ftp.linux.org.uk> | 2007-10-29 05:08:38 +0000 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-29 07:41:33 -0700 |
| commit | db3a91fe2b425c9adde47069efebdba44e665cef (patch) | |
| tree | 85137ad8531f2dfa667bad11c82116c8f5feed48 /drivers/scsi | |
| parent | 142956af525002c5378e7d91d81a01189841a785 (diff) | |
| download | lwn-db3a91fe2b425c9adde47069efebdba44e665cef.tar.gz lwn-db3a91fe2b425c9adde47069efebdba44e665cef.zip | |
deal with resource allocation bugs in arcmsr
a) for type B we should _not_ iounmap() acb->pmu; it's not ioremapped.
b) for type B we should iounmap() two regions we _do_ ioremap.
c) if ioremap() fails, we need to bail out (and clean up).
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/arcmsr/arcmsr.h | 9 | ||||
| -rw-r--r-- | drivers/scsi/arcmsr/arcmsr_hba.c | 33 |
2 files changed, 30 insertions, 12 deletions
diff --git a/drivers/scsi/arcmsr/arcmsr.h b/drivers/scsi/arcmsr/arcmsr.h index 3c38cd8d7117..a67e29f83ae5 100644 --- a/drivers/scsi/arcmsr/arcmsr.h +++ b/drivers/scsi/arcmsr/arcmsr.h @@ -348,14 +348,6 @@ struct MessageUnit_B uint32_t __iomem *ioctl_rbuffer_reg; }; -struct MessageUnit -{ - union - { - struct MessageUnit_A pmu_A; - struct MessageUnit_B pmu_B; - } u; -}; /* ******************************************************************************* ** Adapter Control Block @@ -375,7 +367,6 @@ struct AdapterControlBlock uint32_t outbound_int_enable; union { - struct MessageUnit * pmu; struct MessageUnit_A __iomem * pmuA; struct MessageUnit_B * pmuB; }; diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c index 2f34cdb0bec1..d466a2dac1db 100644 --- a/drivers/scsi/arcmsr/arcmsr_hba.c +++ b/drivers/scsi/arcmsr/arcmsr_hba.c @@ -240,14 +240,18 @@ static int arcmsr_alloc_ccb_pool(struct AdapterControlBlock *acb) if (!acb->pmuA) { printk(KERN_NOTICE "arcmsr%d: memory mapping region fail \n", acb->host->host_no); + return -ENOMEM; } dma_coherent = dma_alloc_coherent(&pdev->dev, ARCMSR_MAX_FREECCB_NUM * sizeof (struct CommandControlBlock) + 0x20, &dma_coherent_handle, GFP_KERNEL); - if (!dma_coherent) + + if (!dma_coherent) { + iounmap(acb->pmuA); return -ENOMEM; + } acb->dma_coherent = dma_coherent; acb->dma_coherent_handle = dma_coherent_handle; @@ -331,8 +335,16 @@ static int arcmsr_alloc_ccb_pool(struct AdapterControlBlock *acb) acb->pmuB = reg; mem_base0 = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); + if (!mem_base0) + goto out; + mem_base1 = ioremap(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2)); + if (!mem_base1) { + iounmap(mem_base0); + goto out; + } + reg->drv2iop_doorbell_reg = mem_base0 + ARCMSR_DRV2IOP_DOORBELL; reg->drv2iop_doorbell_mask_reg = mem_base0 + ARCMSR_DRV2IOP_DOORBELL_MASK; @@ -357,6 +369,12 @@ static int arcmsr_alloc_ccb_pool(struct AdapterControlBlock *acb) break; } return 0; + +out: + dma_free_coherent(&acb->pdev->dev, + ARCMSR_MAX_FREECCB_NUM * sizeof(struct CommandControlBlock) + 0x20, + acb->dma_coherent, acb->dma_coherent_handle); + return -ENOMEM; } static int arcmsr_probe(struct pci_dev *pdev, @@ -449,7 +467,6 @@ static int arcmsr_probe(struct pci_dev *pdev, free_irq(pdev->irq, acb); out_free_ccb_pool: arcmsr_free_ccb_pool(acb); - iounmap(acb->pmu); out_release_regions: pci_release_regions(pdev); out_host_put: @@ -810,7 +827,6 @@ static void arcmsr_remove(struct pci_dev *pdev) } free_irq(pdev->irq, acb); - iounmap(acb->pmu); arcmsr_free_ccb_pool(acb); pci_release_regions(pdev); @@ -1018,6 +1034,17 @@ static void arcmsr_stop_adapter_bgrb(struct AdapterControlBlock *acb) static void arcmsr_free_ccb_pool(struct AdapterControlBlock *acb) { + switch (acb->adapter_type) { + case ACB_ADAPTER_TYPE_A: { + iounmap(acb->pmuA); + break; + } + case ACB_ADAPTER_TYPE_B: { + struct MessageUnit_B *reg = acb->pmuB; + iounmap(reg->drv2iop_doorbell_reg - ARCMSR_DRV2IOP_DOORBELL); + iounmap(reg->ioctl_wbuffer_reg - ARCMSR_IOCTL_WBUFFER); + } + } dma_free_coherent(&acb->pdev->dev, ARCMSR_MAX_FREECCB_NUM * sizeof (struct CommandControlBlock) + 0x20, acb->dma_coherent, |