From: Ondrej Zary Date: Tue, 17 Nov 2015 18:24:17 +0000 (+0100) Subject: atp870u: Improve _probe() X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=bdd5ac4065dbc2bb1478ae0c9205a651487c7432;p=deliverable%2Flinux.git atp870u: Improve _probe() Move scsi_host_alloc() to the top of _probe() to remove code duplication, *p and unneeded atpdev (de)allocation and copying. While at it, fix the error paths to return real error codes and also add missing pci_disble_device() call. Signed-off-by: Ondrej Zary Reviewed-by: Hannes Reinicke Acked-by: Christoph Hellwig Signed-off-by: Martin K. Petersen --- diff --git a/drivers/scsi/atp870u.c b/drivers/scsi/atp870u.c index 0b349bc4e6e6..d0119f173195 100644 --- a/drivers/scsi/atp870u.c +++ b/drivers/scsi/atp870u.c @@ -1248,29 +1248,41 @@ static int atp870u_probe(struct pci_dev *pdev, const struct pci_device_id *ent) unsigned int base_io, error,n; unsigned char host_id; struct Scsi_Host *shpnt = NULL; - struct atp_unit *atpdev, *p; + struct atp_unit *atpdev; unsigned char setupdata[2][16]; + int err; - atpdev = kzalloc(sizeof(*atpdev), GFP_KERNEL); - if (!atpdev) - return -ENOMEM; - - if (pci_enable_device(pdev)) - goto err_eio; + err = pci_enable_device(pdev); + if (err) + goto fail; if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) { printk(KERN_ERR "atp870u: DMA mask required but not available.\n"); - goto err_eio; + err = -EIO; + goto disable_device; } + err = -ENOMEM; + shpnt = scsi_host_alloc(&atp870u_template, sizeof(struct atp_unit)); + if (!shpnt) + goto disable_device; + + atpdev = shost_priv(shpnt); + + atpdev->host = shpnt; + atpdev->pdev = pdev; + pci_set_drvdata(pdev, atpdev); + /* * It's probably easier to weed out some revisions like * this than via the PCI device table */ if (ent->device == PCI_DEVICE_ID_ARTOP_AEC7610) { atpdev->chip_ver = pdev->revision; - if (atpdev->chip_ver < 2) - goto err_eio; + if (atpdev->chip_ver < 2) { + err = -ENODEV; + goto unregister; + } } switch (ent->device) { @@ -1358,41 +1370,33 @@ flash_ok_880: atpdev->async[0] = ~(atpdev->async[0]); atp_writeb_base(atpdev, 0x35, atpdev->global_map[0]); - shpnt = scsi_host_alloc(&atp870u_template, sizeof(struct atp_unit)); - if (!shpnt) - goto err_nomem; - - p = (struct atp_unit *)&shpnt->hostdata; - - atpdev->host = shpnt; - atpdev->pdev = pdev; - pci_set_drvdata(pdev, p); - memcpy(p, atpdev, sizeof(*atpdev)); if (atp870u_init_tables(shpnt) < 0) { printk(KERN_ERR "Unable to allocate tables for Acard controller\n"); + err = -ENOMEM; goto unregister; } - if (request_irq(pdev->irq, atp870u_intr_handle, IRQF_SHARED, "atp880i", shpnt)) { + err = request_irq(pdev->irq, atp870u_intr_handle, IRQF_SHARED, "atp880i", shpnt); + if (err) { printk(KERN_ERR "Unable to allocate IRQ%d for Acard controller.\n", pdev->irq); goto free_tables; } spin_lock_irqsave(shpnt->host_lock, flags); - k = atp_readb_base(p, 0x38) & 0x80; - atp_writeb_base(p, 0x38, k); - atp_writeb_base(p, 0x3b, 0x20); + k = atp_readb_base(atpdev, 0x38) & 0x80; + atp_writeb_base(atpdev, 0x38, k); + atp_writeb_base(atpdev, 0x3b, 0x20); mdelay(32); - atp_writeb_base(p, 0x3b, 0); + atp_writeb_base(atpdev, 0x3b, 0); mdelay(32); - atp_readb_io(p, 0, 0x1b); - atp_readb_io(p, 0, 0x17); + atp_readb_io(atpdev, 0, 0x1b); + atp_readb_io(atpdev, 0, 0x17); - atp_set_host_id(p, 0, host_id); + atp_set_host_id(atpdev, 0, host_id); tscam(shpnt); - atp_is(p, 0, true, atp_readb_base(p, 0x3f) & 0x40); - atp_writeb_base(p, 0x38, 0xb0); + atp_is(atpdev, 0, true, atp_readb_base(atpdev, 0x3f) & 0x40); + atp_writeb_base(atpdev, 0x38, 0xb0); shpnt->max_id = 16; shpnt->this_id = host_id; shpnt->unique_id = base_io; @@ -1410,50 +1414,43 @@ flash_ok_880: atpdev->pciport[0] = base_io + 0x40; atpdev->pciport[1] = base_io + 0x50; - shpnt = scsi_host_alloc(&atp870u_template, sizeof(struct atp_unit)); - if (!shpnt) - goto err_nomem; - - p = (struct atp_unit *)&shpnt->hostdata; - - atpdev->host = shpnt; - atpdev->pdev = pdev; - pci_set_drvdata(pdev, p); - memcpy(p, atpdev, sizeof(struct atp_unit)); - if (atp870u_init_tables(shpnt) < 0) + if (atp870u_init_tables(shpnt) < 0) { + err = -ENOMEM; goto unregister; + } #ifdef ED_DBGP - printk("request_irq() shpnt %p hostdata %p\n", shpnt, p); + printk("request_irq() shpnt %p hostdata %p\n", shpnt, atpdev); #endif - if (request_irq(pdev->irq, atp870u_intr_handle, IRQF_SHARED, "atp870u", shpnt)) { + err = request_irq(pdev->irq, atp870u_intr_handle, IRQF_SHARED, "atp870u", shpnt); + if (err) { printk(KERN_ERR "Unable to allocate IRQ for Acard controller.\n"); goto free_tables; } spin_lock_irqsave(shpnt->host_lock, flags); - c = atp_readb_base(p, 0x29); - atp_writeb_base(p, 0x29, c | 0x04); + c = atp_readb_base(atpdev, 0x29); + atp_writeb_base(atpdev, 0x29, c | 0x04); n=0x1f80; next_fblk_885: if (n >= 0x2000) { goto flash_ok_885; } - atp_writew_base(p, 0x3c, n); - if (atp_readl_base(p, 0x38) == 0xffffffff) { + atp_writew_base(atpdev, 0x3c, n); + if (atp_readl_base(atpdev, 0x38) == 0xffffffff) { goto flash_ok_885; } for (m=0; m < 2; m++) { - p->global_map[m]= 0; + atpdev->global_map[m]= 0; for (k=0; k < 4; k++) { - atp_writew_base(p, 0x3c, n++); - ((unsigned long *)&setupdata[m][0])[k] = atp_readl_base(p, 0x38); + atp_writew_base(atpdev, 0x3c, n++); + ((unsigned long *)&setupdata[m][0])[k] = atp_readl_base(atpdev, 0x38); } for (k=0; k < 4; k++) { - atp_writew_base(p, 0x3c, n++); - ((unsigned long *)&p->sp[m][0])[k] = atp_readl_base(p, 0x38); + atp_writew_base(atpdev, 0x3c, n++); + ((unsigned long *)&atpdev->sp[m][0])[k] = atp_readl_base(atpdev, 0x38); } n += 8; } @@ -1462,81 +1459,81 @@ flash_ok_885: #ifdef ED_DBGP printk( "Flash Read OK\n"); #endif - c = atp_readb_base(p, 0x29); - atp_writeb_base(p, 0x29, c & 0xfb); + c = atp_readb_base(atpdev, 0x29); + atp_writeb_base(atpdev, 0x29, c & 0xfb); for (c=0;c < 2;c++) { - p->ultra_map[c]=0; - p->async[c] = 0; + atpdev->ultra_map[c]=0; + atpdev->async[c] = 0; for (k=0; k < 16; k++) { n=1; n = n << k; - if (p->sp[c][k] > 1) { - p->ultra_map[c] |= n; + if (atpdev->sp[c][k] > 1) { + atpdev->ultra_map[c] |= n; } else { - if (p->sp[c][k] == 0) { - p->async[c] |= n; + if (atpdev->sp[c][k] == 0) { + atpdev->async[c] |= n; } } } - p->async[c] = ~(p->async[c]); + atpdev->async[c] = ~(atpdev->async[c]); - if (p->global_map[c] == 0) { + if (atpdev->global_map[c] == 0) { k=setupdata[c][1]; if ((k & 0x40) != 0) - p->global_map[c] |= 0x20; + atpdev->global_map[c] |= 0x20; k &= 0x07; - p->global_map[c] |= k; + atpdev->global_map[c] |= k; if ((setupdata[c][2] & 0x04) != 0) - p->global_map[c] |= 0x08; - p->host_id[c] = setupdata[c][0] & 0x07; + atpdev->global_map[c] |= 0x08; + atpdev->host_id[c] = setupdata[c][0] & 0x07; } } - k = atp_readb_base(p, 0x28) & 0x8f; + k = atp_readb_base(atpdev, 0x28) & 0x8f; k |= 0x10; - atp_writeb_base(p, 0x28, k); - atp_writeb_pci(p, 0, 1, 0x80); - atp_writeb_pci(p, 1, 1, 0x80); + atp_writeb_base(atpdev, 0x28, k); + atp_writeb_pci(atpdev, 0, 1, 0x80); + atp_writeb_pci(atpdev, 1, 1, 0x80); mdelay(100); - atp_writeb_pci(p, 0, 1, 0); - atp_writeb_pci(p, 1, 1, 0); + atp_writeb_pci(atpdev, 0, 1, 0); + atp_writeb_pci(atpdev, 1, 1, 0); mdelay(1000); - atp_readb_io(p, 0, 0x1b); - atp_readb_io(p, 0, 0x17); - atp_readb_io(p, 1, 0x1b); - atp_readb_io(p, 1, 0x17); + atp_readb_io(atpdev, 0, 0x1b); + atp_readb_io(atpdev, 0, 0x17); + atp_readb_io(atpdev, 1, 0x1b); + atp_readb_io(atpdev, 1, 0x17); - k=p->host_id[0]; + k=atpdev->host_id[0]; if (k > 7) k = (k & 0x07) | 0x40; - atp_set_host_id(p, 0, k); + atp_set_host_id(atpdev, 0, k); - k=p->host_id[1]; + k=atpdev->host_id[1]; if (k > 7) k = (k & 0x07) | 0x40; - atp_set_host_id(p, 1, k); + atp_set_host_id(atpdev, 1, k); mdelay(600); /* this delay used to be called tscam_885() */ printk(KERN_INFO " Scanning Channel A SCSI Device ...\n"); - atp_is(p, 0, true, atp_readb_io(p, 0, 0x1b) >> 7); - atp_writeb_io(p, 0, 0x16, 0x80); + atp_is(atpdev, 0, true, atp_readb_io(atpdev, 0, 0x1b) >> 7); + atp_writeb_io(atpdev, 0, 0x16, 0x80); printk(KERN_INFO " Scanning Channel B SCSI Device ...\n"); - atp_is(p, 1, true, atp_readb_io(p, 1, 0x1b) >> 7); - atp_writeb_io(p, 1, 0x16, 0x80); - k = atp_readb_base(p, 0x28) & 0xcf; + atp_is(atpdev, 1, true, atp_readb_io(atpdev, 1, 0x1b) >> 7); + atp_writeb_io(atpdev, 1, 0x16, 0x80); + k = atp_readb_base(atpdev, 0x28) & 0xcf; k |= 0xc0; - atp_writeb_base(p, 0x28, k); - k = atp_readb_base(p, 0x1f) | 0x80; - atp_writeb_base(p, 0x1f, k); - k = atp_readb_base(p, 0x29) | 0x01; - atp_writeb_base(p, 0x29, k); + atp_writeb_base(atpdev, 0x28, k); + k = atp_readb_base(atpdev, 0x1f) | 0x80; + atp_writeb_base(atpdev, 0x1f, k); + k = atp_readb_base(atpdev, 0x29) | 0x01; + atp_writeb_base(atpdev, 0x29, k); #ifdef ED_DBGP //printk("atp885: atp_host[0] 0x%p\n", atp_host[0]); #endif shpnt->max_id = 16; - shpnt->max_lun = (p->global_map[0] & 0x07) + 1; + shpnt->max_lun = (atpdev->global_map[0] & 0x07) + 1; shpnt->max_channel = 1; - shpnt->this_id = p->host_id[0]; + shpnt->this_id = atpdev->host_id[0]; shpnt->unique_id = base_io; shpnt->io_port = base_io; shpnt->n_io_port = 0xff; /* Number of bytes of I/O space used */ @@ -1563,41 +1560,35 @@ flash_ok_885: atpdev->ultra_map[0] = 0xffff; } - shpnt = scsi_host_alloc(&atp870u_template, sizeof(struct atp_unit)); - if (!shpnt) - goto err_nomem; - p = (struct atp_unit *)&shpnt->hostdata; - - atpdev->host = shpnt; - atpdev->pdev = pdev; - pci_set_drvdata(pdev, p); - memcpy(p, atpdev, sizeof(*atpdev)); - if (atp870u_init_tables(shpnt) < 0) + if (atp870u_init_tables(shpnt) < 0) { + err = -ENOMEM; goto unregister; + } - if (request_irq(pdev->irq, atp870u_intr_handle, IRQF_SHARED, "atp870i", shpnt)) { + err = request_irq(pdev->irq, atp870u_intr_handle, IRQF_SHARED, "atp870i", shpnt); + if (err) { printk(KERN_ERR "Unable to allocate IRQ%d for Acard controller.\n", pdev->irq); goto free_tables; } spin_lock_irqsave(shpnt->host_lock, flags); if (atpdev->chip_ver > 0x07) /* check if atp876 chip then enable terminator */ - atp_writeb_base(p, 0x3e, 0x00); + atp_writeb_base(atpdev, 0x3e, 0x00); - k = (atp_readb_base(p, 0x3a) & 0xf3) | 0x10; - atp_writeb_base(p, 0x3a, k); - atp_writeb_base(p, 0x3a, k & 0xdf); + k = (atp_readb_base(atpdev, 0x3a) & 0xf3) | 0x10; + atp_writeb_base(atpdev, 0x3a, k); + atp_writeb_base(atpdev, 0x3a, k & 0xdf); mdelay(32); - atp_writeb_base(p, 0x3a, k); + atp_writeb_base(atpdev, 0x3a, k); mdelay(32); - atp_set_host_id(p, 0, host_id); + atp_set_host_id(atpdev, 0, host_id); tscam(shpnt); - atp_writeb_base(p, 0x3a, atp_readb_base(p, 0x3a) | 0x10); - atp_is(p, 0, p->chip_ver == 4, 0); - atp_writeb_base(p, 0x3a, atp_readb_base(p, 0x3a) & 0xef); - atp_writeb_base(p, 0x3b, atp_readb_base(p, 0x3b) | 0x20); + atp_writeb_base(atpdev, 0x3a, atp_readb_base(atpdev, 0x3a) | 0x10); + atp_is(atpdev, 0, atpdev->chip_ver == 4, 0); + atp_writeb_base(atpdev, 0x3a, atp_readb_base(atpdev, 0x3a) & 0xef); + atp_writeb_base(atpdev, 0x3b, atp_readb_base(atpdev, 0x3b) | 0x20); if (atpdev->chip_ver == 4) shpnt->max_id = 16; else @@ -1609,9 +1600,12 @@ flash_ok_885: shpnt->irq = pdev->irq; } spin_unlock_irqrestore(shpnt->host_lock, flags); - if (!request_region(base_io, shpnt->n_io_port, "atp870u")) + if (!request_region(base_io, shpnt->n_io_port, "atp870u")) { + err = -EBUSY; goto request_io_fail; - if (scsi_add_host(shpnt, &pdev->dev)) + } + err = scsi_add_host(shpnt, &pdev->dev); + if (err) goto scsi_add_fail; scsi_scan_host(shpnt); #ifdef ED_DBGP @@ -1629,15 +1623,11 @@ free_tables: printk("atp870u_prob:free_table\n"); atp870u_free_tables(shpnt); unregister: - printk("atp870u_prob:unregister\n"); scsi_host_put(shpnt); - return -1; -err_eio: - kfree(atpdev); - return -EIO; -err_nomem: - kfree(atpdev); - return -ENOMEM; +disable_device: + pci_disable_device(pdev); +fail: + return err; } /* The abort command does not leave the device in a clean state where