staging: spectra: move all init logic into nand_pci_probe
Currently there are some driver initialization logic that is not part of nand_pci_probe function. This will result in that part of driver initialization code executing even on platforms without the corresponding hardware which is always dangerous. Signed-off-by: Chuanxiao Dong <chuanxiao.dong@intel.com> Signed-off-by: Yong Wang <yong.y.wang@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Yong Wang
Greg Kroah-Hartman
parent
237a1a1aef
commit
6f5a416216
4 changed files with 149 additions and 133 deletions
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@ -729,34 +729,16 @@ static void create_sysfs_entry(struct device *dev)
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}
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*/
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static int GLOB_SBD_init(void)
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int register_spectra_ftl()
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{
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int i;
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/* Set debug output level (0~3) here. 3 is most verbose */
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printk(KERN_ALERT "Spectra: %s\n", GLOB_version);
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mutex_init(&spectra_lock);
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GLOB_SBD_majornum = register_blkdev(0, GLOB_SBD_NAME);
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if (GLOB_SBD_majornum <= 0) {
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printk(KERN_ERR "Unable to get the major %d for Spectra",
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GLOB_SBD_majornum);
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return -EBUSY;
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}
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if (PASS != GLOB_FTL_Flash_Init()) {
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printk(KERN_ERR "Spectra: Unable to Initialize Flash Device. "
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"Aborting\n");
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goto out_flash_register;
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}
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/* create_sysfs_entry(&dev->dev); */
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if (PASS != GLOB_FTL_IdentifyDevice(&IdentifyDeviceData)) {
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printk(KERN_ERR "Spectra: Unable to Read Flash Device. "
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"Aborting\n");
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goto out_flash_register;
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return -ENOMEM;
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} else {
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nand_dbg_print(NAND_DBG_WARN, "In GLOB_SBD_init: "
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"Num blocks=%d, pagesperblock=%d, "
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@ -775,24 +757,46 @@ static int GLOB_SBD_init(void)
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}
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printk(KERN_ALERT "Spectra: block table has been found.\n");
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GLOB_SBD_majornum = register_blkdev(0, GLOB_SBD_NAME);
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if (GLOB_SBD_majornum <= 0) {
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printk(KERN_ERR "Unable to get the major %d for Spectra",
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GLOB_SBD_majornum);
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goto out_ftl_flash_register;
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}
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for (i = 0; i < NUM_DEVICES; i++)
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if (SBD_setup_device(&nand_device[i], i) == -ENOMEM)
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goto out_ftl_flash_register;
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goto out_blk_register;
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nand_dbg_print(NAND_DBG_DEBUG,
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"Spectra: module loaded with major number %d\n",
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GLOB_SBD_majornum);
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return 0;
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return PASS;
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out_blk_register:
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unregister_blkdev(GLOB_SBD_majornum, GLOB_SBD_NAME);
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out_ftl_flash_register:
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GLOB_FTL_Cache_Release();
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out_flash_register:
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GLOB_FTL_Flash_Release();
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unregister_blkdev(GLOB_SBD_majornum, GLOB_SBD_NAME);
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printk(KERN_ERR "Spectra: Module load failed.\n");
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return -ENOMEM;
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return FAIL;
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}
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EXPORT_SYMBOL_GPL(register_spectra_ftl);
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static int GLOB_SBD_init(void)
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{
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/* Set debug output level (0~3) here. 3 is most verbose */
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printk(KERN_ALERT "Spectra: %s\n", GLOB_version);
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mutex_init(&spectra_lock);
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if (PASS != GLOB_FTL_Flash_Init()) {
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printk(KERN_ERR "Spectra: Unable to Initialize Flash Device. "
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"Aborting\n");
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return -ENODEV;
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}
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return 0;
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}
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static void __exit GLOB_SBD_exit(void)
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@ -80,5 +80,6 @@ extern int nand_debug_level;
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extern int GLOB_Calc_Used_Bits(u32 n);
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extern u64 GLOB_u64_Div(u64 addr, u32 divisor);
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extern u64 GLOB_u64_Remainder(u64 addr, u32 divisor_type);
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extern int register_spectra_ftl(void);
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#endif /* _FFSPORT_ */
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@ -1258,9 +1258,7 @@ int GLOB_FTL_Flash_Init(void)
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g_SBDCmdIndex = 0;
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GLOB_LLD_Flash_Init();
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status = GLOB_LLD_Read_Device_ID();
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status = GLOB_LLD_Flash_Init();
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return status;
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}
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@ -2395,112 +2395,9 @@ static int nand_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
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unsigned long csr_base;
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unsigned long csr_len;
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struct mrst_nand_info *pndev = &info;
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nand_dbg_print(NAND_DBG_WARN, "%s, Line %d, Function: %s\n",
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__FILE__, __LINE__, __func__);
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ret = pci_enable_device(dev);
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if (ret) {
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printk(KERN_ERR "Spectra: pci_enable_device failed.\n");
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return ret;
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}
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pci_set_master(dev);
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pndev->dev = dev;
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csr_base = pci_resource_start(dev, 0);
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if (!csr_base) {
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printk(KERN_ERR "Spectra: pci_resource_start failed!\n");
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ret = -ENODEV;
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goto failed_req_csr;
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}
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csr_len = pci_resource_len(dev, 0);
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if (!csr_len) {
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printk(KERN_ERR "Spectra: pci_resource_len failed!\n");
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ret = -ENODEV;
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goto failed_req_csr;
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}
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ret = pci_request_regions(dev, SPECTRA_NAND_NAME);
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if (ret) {
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printk(KERN_ERR "Spectra: Unable to request "
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"memory region\n");
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goto failed_req_csr;
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}
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pndev->ioaddr = ioremap_nocache(csr_base, csr_len);
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if (!pndev->ioaddr) {
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printk(KERN_ERR "Spectra: Unable to remap memory region\n");
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ret = -ENOMEM;
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goto failed_remap_csr;
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}
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nand_dbg_print(NAND_DBG_DEBUG, "Spectra: CSR 0x%08lx -> 0x%p (0x%lx)\n",
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csr_base, pndev->ioaddr, csr_len);
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init_completion(&pndev->complete);
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nand_dbg_print(NAND_DBG_DEBUG, "Spectra: IRQ %d\n", dev->irq);
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#if CMD_DMA
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if (request_irq(dev->irq, cdma_isr, IRQF_SHARED,
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SPECTRA_NAND_NAME, &info)) {
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printk(KERN_ERR "Spectra: Unable to allocate IRQ\n");
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ret = -ENODEV;
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iounmap(pndev->ioaddr);
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goto failed_remap_csr;
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}
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#else
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if (request_irq(dev->irq, ddma_isr, IRQF_SHARED,
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SPECTRA_NAND_NAME, &info)) {
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printk(KERN_ERR "Spectra: Unable to allocate IRQ\n");
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ret = -ENODEV;
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iounmap(pndev->ioaddr);
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goto failed_remap_csr;
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}
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#endif
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pci_set_drvdata(dev, pndev);
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return 0;
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failed_remap_csr:
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pci_release_regions(dev);
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failed_req_csr:
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pci_disable_device(dev);
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return ret;
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}
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static void nand_pci_remove(struct pci_dev *dev)
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{
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struct mrst_nand_info *pndev = pci_get_drvdata(dev);
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nand_dbg_print(NAND_DBG_WARN, "%s, Line %d, Function: %s\n",
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__FILE__, __LINE__, __func__);
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#if CMD_DMA
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free_irq(dev->irq, pndev);
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#endif
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iounmap(pndev->ioaddr);
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pci_release_regions(dev);
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pci_disable_device(dev);
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}
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MODULE_DEVICE_TABLE(pci, nand_pci_ids);
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static struct pci_driver nand_pci_driver = {
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.name = SPECTRA_NAND_NAME,
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.id_table = nand_pci_ids,
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.probe = nand_pci_probe,
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.remove = nand_pci_remove,
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};
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int NAND_Flash_Init(void)
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{
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int retval;
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u32 int_mask;
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nand_dbg_print(NAND_DBG_TRACE, "%s, Line %d, Function: %s\n",
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nand_dbg_print(NAND_DBG_WARN, "%s, Line %d, Function: %s\n",
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__FILE__, __LINE__, __func__);
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FlashReg = ioremap_nocache(GLOB_HWCTL_REG_BASE,
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@ -2582,6 +2479,122 @@ int NAND_Flash_Init(void)
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iowrite32(0, FlashReg + TWO_ROW_ADDR_CYCLES);
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iowrite32(1, FlashReg + ECC_ENABLE);
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enable_ecc = 1;
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ret = pci_enable_device(dev);
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if (ret) {
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printk(KERN_ERR "Spectra: pci_enable_device failed.\n");
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goto failed_req_csr;
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}
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pci_set_master(dev);
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pndev->dev = dev;
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csr_base = pci_resource_start(dev, 0);
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if (!csr_base) {
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printk(KERN_ERR "Spectra: pci_resource_start failed!\n");
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ret = -ENODEV;
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goto failed_req_csr;
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}
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csr_len = pci_resource_len(dev, 0);
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if (!csr_len) {
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printk(KERN_ERR "Spectra: pci_resource_len failed!\n");
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ret = -ENODEV;
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goto failed_req_csr;
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}
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ret = pci_request_regions(dev, SPECTRA_NAND_NAME);
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if (ret) {
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printk(KERN_ERR "Spectra: Unable to request "
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"memory region\n");
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goto failed_req_csr;
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}
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pndev->ioaddr = ioremap_nocache(csr_base, csr_len);
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if (!pndev->ioaddr) {
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printk(KERN_ERR "Spectra: Unable to remap memory region\n");
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ret = -ENOMEM;
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goto failed_remap_csr;
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}
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nand_dbg_print(NAND_DBG_DEBUG, "Spectra: CSR 0x%08lx -> 0x%p (0x%lx)\n",
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csr_base, pndev->ioaddr, csr_len);
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init_completion(&pndev->complete);
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nand_dbg_print(NAND_DBG_DEBUG, "Spectra: IRQ %d\n", dev->irq);
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#if CMD_DMA
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if (request_irq(dev->irq, cdma_isr, IRQF_SHARED,
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SPECTRA_NAND_NAME, &info)) {
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printk(KERN_ERR "Spectra: Unable to allocate IRQ\n");
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ret = -ENODEV;
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iounmap(pndev->ioaddr);
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goto failed_remap_csr;
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}
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#else
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if (request_irq(dev->irq, ddma_isr, IRQF_SHARED,
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SPECTRA_NAND_NAME, &info)) {
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printk(KERN_ERR "Spectra: Unable to allocate IRQ\n");
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ret = -ENODEV;
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iounmap(pndev->ioaddr);
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goto failed_remap_csr;
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}
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#endif
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pci_set_drvdata(dev, pndev);
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ret = GLOB_LLD_Read_Device_ID();
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if (ret) {
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iounmap(pndev->ioaddr);
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goto failed_remap_csr;
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}
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ret = register_spectra_ftl();
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if (ret) {
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iounmap(pndev->ioaddr);
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goto failed_remap_csr;
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}
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return 0;
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failed_remap_csr:
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pci_release_regions(dev);
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failed_req_csr:
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pci_disable_device(dev);
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iounmap(FlashMem);
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iounmap(FlashReg);
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return ret;
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}
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static void nand_pci_remove(struct pci_dev *dev)
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{
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struct mrst_nand_info *pndev = pci_get_drvdata(dev);
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nand_dbg_print(NAND_DBG_WARN, "%s, Line %d, Function: %s\n",
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__FILE__, __LINE__, __func__);
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#if CMD_DMA
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free_irq(dev->irq, pndev);
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#endif
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iounmap(pndev->ioaddr);
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pci_release_regions(dev);
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pci_disable_device(dev);
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}
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MODULE_DEVICE_TABLE(pci, nand_pci_ids);
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static struct pci_driver nand_pci_driver = {
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.name = SPECTRA_NAND_NAME,
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.id_table = nand_pci_ids,
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.probe = nand_pci_probe,
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.remove = nand_pci_remove,
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};
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int NAND_Flash_Init(void)
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{
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int retval;
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nand_dbg_print(NAND_DBG_TRACE, "%s, Line %d, Function: %s\n",
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__FILE__, __LINE__, __func__);
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retval = pci_register_driver(&nand_pci_driver);
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if (retval)
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