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51a41ec6d3
The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is ignored (apart from emitting a warning) and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new(), which already returns void. Eventually after all drivers are converted, .remove_new() will be renamed to .remove(). In the error path emit an error message replacing the (less useful) message by the core. Apart from the improved error message there is no change in behaviour. Trivially convert this driver from always returning zero in the remove callback to the void returning variant. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/63294479a4e745210c078859afa88904fa0b3be8.1701619134.git.u.kleine-koenig@pengutronix.de Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
138 lines
3.3 KiB
C
138 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Detection routine for the NCR53c710 based BVME6000 SCSI Controllers for Linux.
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*
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* Based on work by Alan Hourihane and Kars de Jong
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*
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* Rewritten to use 53c700.c by Richard Hirst <richard@sleepie.demon.co.uk>
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*/
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#include <linux/module.h>
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#include <linux/blkdev.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/slab.h>
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#include <asm/bvme6000hw.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_transport.h>
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#include <scsi/scsi_transport_spi.h>
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#include "53c700.h"
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MODULE_AUTHOR("Richard Hirst <richard@sleepie.demon.co.uk>");
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MODULE_DESCRIPTION("BVME6000 NCR53C710 driver");
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MODULE_LICENSE("GPL");
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static struct scsi_host_template bvme6000_scsi_driver_template = {
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.name = "BVME6000 NCR53c710 SCSI",
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.proc_name = "BVME6000",
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.this_id = 7,
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.module = THIS_MODULE,
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};
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static struct platform_device *bvme6000_scsi_device;
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static int
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bvme6000_probe(struct platform_device *dev)
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{
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struct Scsi_Host *host;
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struct NCR_700_Host_Parameters *hostdata;
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if (!MACH_IS_BVME6000)
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goto out;
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hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
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if (!hostdata) {
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printk(KERN_ERR "bvme6000-scsi: "
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"Failed to allocate host data\n");
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goto out;
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}
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/* Fill in the required pieces of hostdata */
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hostdata->base = (void __iomem *)BVME_NCR53C710_BASE;
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hostdata->clock = 40; /* XXX - depends on the CPU clock! */
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hostdata->chip710 = 1;
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hostdata->dmode_extra = DMODE_FC2;
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hostdata->dcntl_extra = EA_710;
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hostdata->ctest7_extra = CTEST7_TT1;
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/* and register the chip */
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host = NCR_700_detect(&bvme6000_scsi_driver_template, hostdata,
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&dev->dev);
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if (!host) {
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printk(KERN_ERR "bvme6000-scsi: No host detected; "
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"board configuration problem?\n");
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goto out_free;
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}
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host->base = BVME_NCR53C710_BASE;
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host->this_id = 7;
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host->irq = BVME_IRQ_SCSI;
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if (request_irq(BVME_IRQ_SCSI, NCR_700_intr, 0, "bvme6000-scsi",
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host)) {
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printk(KERN_ERR "bvme6000-scsi: request_irq failed\n");
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goto out_put_host;
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}
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platform_set_drvdata(dev, host);
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scsi_scan_host(host);
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return 0;
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out_put_host:
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scsi_host_put(host);
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out_free:
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kfree(hostdata);
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out:
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return -ENODEV;
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}
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static void
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bvme6000_device_remove(struct platform_device *dev)
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{
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struct Scsi_Host *host = platform_get_drvdata(dev);
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struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
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scsi_remove_host(host);
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NCR_700_release(host);
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kfree(hostdata);
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free_irq(host->irq, host);
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}
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static struct platform_driver bvme6000_scsi_driver = {
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.driver = {
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.name = "bvme6000-scsi",
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},
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.probe = bvme6000_probe,
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.remove_new = bvme6000_device_remove,
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};
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static int __init bvme6000_scsi_init(void)
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{
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int err;
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err = platform_driver_register(&bvme6000_scsi_driver);
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if (err)
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return err;
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bvme6000_scsi_device = platform_device_register_simple("bvme6000-scsi",
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-1, NULL, 0);
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if (IS_ERR(bvme6000_scsi_device)) {
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platform_driver_unregister(&bvme6000_scsi_driver);
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return PTR_ERR(bvme6000_scsi_device);
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}
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return 0;
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}
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static void __exit bvme6000_scsi_exit(void)
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{
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platform_device_unregister(bvme6000_scsi_device);
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platform_driver_unregister(&bvme6000_scsi_driver);
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}
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module_init(bvme6000_scsi_init);
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module_exit(bvme6000_scsi_exit);
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