c3c026ba5a
This patch fixes a NULL pointer dereference spotted by the Coverity checker. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
172 lines
4.4 KiB
C
172 lines
4.4 KiB
C
/*
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dmx3191d.c - driver for the Domex DMX3191D SCSI card.
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Copyright (C) 2000 by Massimo Piccioni <dafastidio@libero.it>
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Portions Copyright (C) 2004 by Christoph Hellwig <hch@lst.de>
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Based on the generic NCR5380 driver by Drew Eckhardt et al.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/interrupt.h>
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#include <asm/io.h>
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#include <scsi/scsi_host.h>
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/*
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* Defintions for the generic 5380 driver.
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*/
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#define AUTOSENSE
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#define NCR5380_read(reg) inb(port + reg)
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#define NCR5380_write(reg, value) outb(value, port + reg)
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#define NCR5380_implementation_fields unsigned int port
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#define NCR5380_local_declare() NCR5380_implementation_fields
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#define NCR5380_setup(instance) port = instance->io_port
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/*
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* Includes needed for NCR5380.[ch] (XXX: Move them to NCR5380.h)
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*/
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#include <linux/delay.h>
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#include "scsi.h"
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#include "NCR5380.h"
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#include "NCR5380.c"
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#define DMX3191D_DRIVER_NAME "dmx3191d"
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#define DMX3191D_REGION_LEN 8
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static struct scsi_host_template dmx3191d_driver_template = {
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.proc_name = DMX3191D_DRIVER_NAME,
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.name = "Domex DMX3191D",
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.queuecommand = NCR5380_queue_command,
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.eh_abort_handler = NCR5380_abort,
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.eh_bus_reset_handler = NCR5380_bus_reset,
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.can_queue = 32,
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.this_id = 7,
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.sg_tablesize = SG_ALL,
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.cmd_per_lun = 2,
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.use_clustering = DISABLE_CLUSTERING,
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};
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static int __devinit dmx3191d_probe_one(struct pci_dev *pdev,
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const struct pci_device_id *id)
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{
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struct Scsi_Host *shost;
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unsigned long io;
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int error = -ENODEV;
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if (pci_enable_device(pdev))
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goto out;
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io = pci_resource_start(pdev, 0);
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if (!request_region(io, DMX3191D_REGION_LEN, DMX3191D_DRIVER_NAME)) {
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printk(KERN_ERR "dmx3191: region 0x%lx-0x%lx already reserved\n",
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io, io + DMX3191D_REGION_LEN);
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goto out_disable_device;
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}
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shost = scsi_host_alloc(&dmx3191d_driver_template,
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sizeof(struct NCR5380_hostdata));
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if (!shost)
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goto out_release_region;
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shost->io_port = io;
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shost->irq = pdev->irq;
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NCR5380_init(shost, FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E);
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if (request_irq(pdev->irq, NCR5380_intr, SA_SHIRQ,
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DMX3191D_DRIVER_NAME, shost)) {
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/*
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* Steam powered scsi controllers run without an IRQ anyway
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*/
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printk(KERN_WARNING "dmx3191: IRQ %d not available - "
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"switching to polled mode.\n", pdev->irq);
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shost->irq = SCSI_IRQ_NONE;
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}
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pci_set_drvdata(pdev, shost);
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error = scsi_add_host(shost, &pdev->dev);
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if (error)
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goto out_free_irq;
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scsi_scan_host(shost);
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return 0;
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out_free_irq:
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free_irq(shost->irq, shost);
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out_release_region:
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release_region(io, DMX3191D_REGION_LEN);
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out_disable_device:
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pci_disable_device(pdev);
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out:
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return error;
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}
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static void __devexit dmx3191d_remove_one(struct pci_dev *pdev)
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{
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struct Scsi_Host *shost = pci_get_drvdata(pdev);
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scsi_remove_host(shost);
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NCR5380_exit(shost);
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if (shost->irq != SCSI_IRQ_NONE)
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free_irq(shost->irq, shost);
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release_region(shost->io_port, DMX3191D_REGION_LEN);
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pci_disable_device(pdev);
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scsi_host_put(shost);
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}
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static struct pci_device_id dmx3191d_pci_tbl[] = {
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{PCI_VENDOR_ID_DOMEX, PCI_DEVICE_ID_DOMEX_DMX3191D,
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PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
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{ }
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};
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MODULE_DEVICE_TABLE(pci, dmx3191d_pci_tbl);
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static struct pci_driver dmx3191d_pci_driver = {
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.name = DMX3191D_DRIVER_NAME,
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.id_table = dmx3191d_pci_tbl,
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.probe = dmx3191d_probe_one,
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.remove = __devexit_p(dmx3191d_remove_one),
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};
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static int __init dmx3191d_init(void)
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{
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return pci_module_init(&dmx3191d_pci_driver);
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}
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static void __exit dmx3191d_exit(void)
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{
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pci_unregister_driver(&dmx3191d_pci_driver);
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}
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module_init(dmx3191d_init);
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module_exit(dmx3191d_exit);
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MODULE_AUTHOR("Massimo Piccioni <dafastidio@libero.it>");
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MODULE_DESCRIPTION("Domex DMX3191D SCSI driver");
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MODULE_LICENSE("GPL");
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