Showing error 1638

User: Jiri Slaby
Error type: Invalid Pointer Dereference
Error type description: A pointer which is invalid is being dereferenced
File location: drivers/media/video/cx88/cx88-cards.c
Line in file: 3011
Project: Linux Kernel
Project version: 2.6.28
Tools: Smatch (1.59)
Entered: 2013-09-10 07:54:05 UTC

Source: 

2981                printk(KERN_INFO "%s: setting pci latency timer to %d\n",
2982                       name, latency);
2983                pci_write_config_byte(pci, PCI_LATENCY_TIMER, latency);
2984        }
2985        return 0;
2986}
2987
2988int cx88_get_resources(const struct cx88_core *core, struct pci_dev *pci)
2989{
2990        if (request_mem_region(pci_resource_start(pci,0),
2991                               pci_resource_len(pci,0),
2992                               core->name))
2993                return 0;
2994        printk(KERN_ERR
2995               "%s/%d: Can't get MMIO memory @ 0x%llx, subsystem: %04x:%04x\n",
2996               core->name, PCI_FUNC(pci->devfn),
2997               (unsigned long long)pci_resource_start(pci, 0),
2998               pci->subsystem_vendor, pci->subsystem_device);
2999        return -EBUSY;
3000}
3001
3002/* Allocate and initialize the cx88 core struct.  One should hold the
3003 * devlist mutex before calling this.  */
3004struct cx88_core *cx88_core_create(struct pci_dev *pci, int nr)
3005{
3006        struct cx88_core *core;
3007        int i;
3008
3009        core = kzalloc(sizeof(*core), GFP_KERNEL);
3010
3011        atomic_inc(&core->refcount);
3012        core->pci_bus  = pci->bus->number;
3013        core->pci_slot = PCI_SLOT(pci->devfn);
3014        core->pci_irqmask = PCI_INT_RISC_RD_BERRINT | PCI_INT_RISC_WR_BERRINT |
3015                            PCI_INT_BRDG_BERRINT | PCI_INT_SRC_DMA_BERRINT |
3016                            PCI_INT_DST_DMA_BERRINT | PCI_INT_IPB_DMA_BERRINT;
3017        mutex_init(&core->lock);
3018
3019        core->nr = nr;
3020        sprintf(core->name, "cx88[%d]", core->nr);
3021        if (0 != cx88_get_resources(core, pci)) {
Show full sources
↑