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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 02:06:49 +07:00
[SCSI] atp870u: reduce huge stack usage
The atp870u driver is the largest stack eater reported by checkstack (on x86_864, allmodconfig). This converts the offending function to kmalloc+kfree struct atp_unit instead of allocating it on the stack. Was: 0x0000164c atp870u_probe [atp870u]: 3176 Now: 0x0000164c atp870u_probe [atp870u]: 408 Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Randy Dunlap
James Bottomley
parent
87cf898667
commit
dc6a78f1af
@ -2625,29 +2625,32 @@ static int atp870u_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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unsigned int base_io, tmport, error,n;
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unsigned char host_id;
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struct Scsi_Host *shpnt = NULL;
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struct atp_unit atp_dev, *p;
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struct atp_unit *atpdev, *p;
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unsigned char setupdata[2][16];
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int count = 0;
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atpdev = kzalloc(sizeof(*atpdev), GFP_KERNEL);
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if (!atpdev)
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return -ENOMEM;
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if (pci_enable_device(pdev))
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return -EIO;
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goto err_eio;
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if (!pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
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printk(KERN_INFO "atp870u: use 32bit DMA mask.\n");
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} else {
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printk(KERN_ERR "atp870u: DMA mask required but not available.\n");
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return -EIO;
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goto err_eio;
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}
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memset(&atp_dev, 0, sizeof atp_dev);
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/*
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* It's probably easier to weed out some revisions like
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* this than via the PCI device table
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*/
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if (ent->device == PCI_DEVICE_ID_ARTOP_AEC7610) {
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error = pci_read_config_byte(pdev, PCI_CLASS_REVISION, &atp_dev.chip_ver);
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if (atp_dev.chip_ver < 2)
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return -EIO;
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error = pci_read_config_byte(pdev, PCI_CLASS_REVISION, &atpdev->chip_ver);
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if (atpdev->chip_ver < 2)
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goto err_eio;
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}
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switch (ent->device) {
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@ -2656,15 +2659,15 @@ static int atp870u_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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case ATP880_DEVID1:
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case ATP880_DEVID2:
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case ATP885_DEVID:
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atp_dev.chip_ver = 0x04;
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atpdev->chip_ver = 0x04;
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default:
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break;
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}
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base_io = pci_resource_start(pdev, 0);
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base_io &= 0xfffffff8;
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if ((ent->device == ATP880_DEVID1)||(ent->device == ATP880_DEVID2)) {
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error = pci_read_config_byte(pdev, PCI_CLASS_REVISION, &atp_dev.chip_ver);
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error = pci_read_config_byte(pdev, PCI_CLASS_REVISION, &atpdev->chip_ver);
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pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x80);//JCC082803
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host_id = inb(base_io + 0x39);
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@ -2672,17 +2675,17 @@ static int atp870u_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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printk(KERN_INFO " ACARD AEC-67160 PCI Ultra3 LVD Host Adapter: %d"
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" IO:%x, IRQ:%d.\n", count, base_io, pdev->irq);
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atp_dev.ioport[0] = base_io + 0x40;
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atp_dev.pciport[0] = base_io + 0x28;
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atp_dev.dev_id = ent->device;
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atp_dev.host_id[0] = host_id;
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atpdev->ioport[0] = base_io + 0x40;
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atpdev->pciport[0] = base_io + 0x28;
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atpdev->dev_id = ent->device;
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atpdev->host_id[0] = host_id;
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tmport = base_io + 0x22;
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atp_dev.scam_on = inb(tmport);
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atpdev->scam_on = inb(tmport);
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tmport += 0x13;
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atp_dev.global_map[0] = inb(tmport);
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atpdev->global_map[0] = inb(tmport);
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tmport += 0x07;
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atp_dev.ultra_map[0] = inw(tmport);
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atpdev->ultra_map[0] = inw(tmport);
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n = 0x3f09;
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next_fblk_880:
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@ -2695,57 +2698,57 @@ static int atp870u_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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if (inb(base_io + 0x30) == 0xff)
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goto flash_ok_880;
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atp_dev.sp[0][m++] = inb(base_io + 0x30);
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atp_dev.sp[0][m++] = inb(base_io + 0x31);
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atp_dev.sp[0][m++] = inb(base_io + 0x32);
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atp_dev.sp[0][m++] = inb(base_io + 0x33);
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atpdev->sp[0][m++] = inb(base_io + 0x30);
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atpdev->sp[0][m++] = inb(base_io + 0x31);
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atpdev->sp[0][m++] = inb(base_io + 0x32);
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atpdev->sp[0][m++] = inb(base_io + 0x33);
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outw(n, base_io + 0x34);
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n += 0x0002;
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atp_dev.sp[0][m++] = inb(base_io + 0x30);
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atp_dev.sp[0][m++] = inb(base_io + 0x31);
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atp_dev.sp[0][m++] = inb(base_io + 0x32);
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atp_dev.sp[0][m++] = inb(base_io + 0x33);
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atpdev->sp[0][m++] = inb(base_io + 0x30);
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atpdev->sp[0][m++] = inb(base_io + 0x31);
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atpdev->sp[0][m++] = inb(base_io + 0x32);
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atpdev->sp[0][m++] = inb(base_io + 0x33);
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outw(n, base_io + 0x34);
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n += 0x0002;
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atp_dev.sp[0][m++] = inb(base_io + 0x30);
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atp_dev.sp[0][m++] = inb(base_io + 0x31);
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atp_dev.sp[0][m++] = inb(base_io + 0x32);
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atp_dev.sp[0][m++] = inb(base_io + 0x33);
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atpdev->sp[0][m++] = inb(base_io + 0x30);
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atpdev->sp[0][m++] = inb(base_io + 0x31);
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atpdev->sp[0][m++] = inb(base_io + 0x32);
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atpdev->sp[0][m++] = inb(base_io + 0x33);
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outw(n, base_io + 0x34);
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n += 0x0002;
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atp_dev.sp[0][m++] = inb(base_io + 0x30);
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atp_dev.sp[0][m++] = inb(base_io + 0x31);
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atp_dev.sp[0][m++] = inb(base_io + 0x32);
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atp_dev.sp[0][m++] = inb(base_io + 0x33);
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atpdev->sp[0][m++] = inb(base_io + 0x30);
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atpdev->sp[0][m++] = inb(base_io + 0x31);
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atpdev->sp[0][m++] = inb(base_io + 0x32);
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atpdev->sp[0][m++] = inb(base_io + 0x33);
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n += 0x0018;
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goto next_fblk_880;
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flash_ok_880:
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outw(0, base_io + 0x34);
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atp_dev.ultra_map[0] = 0;
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atp_dev.async[0] = 0;
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atpdev->ultra_map[0] = 0;
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atpdev->async[0] = 0;
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for (k = 0; k < 16; k++) {
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n = 1;
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n = n << k;
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if (atp_dev.sp[0][k] > 1) {
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atp_dev.ultra_map[0] |= n;
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if (atpdev->sp[0][k] > 1) {
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atpdev->ultra_map[0] |= n;
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} else {
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if (atp_dev.sp[0][k] == 0)
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atp_dev.async[0] |= n;
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if (atpdev->sp[0][k] == 0)
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atpdev->async[0] |= n;
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}
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}
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atp_dev.async[0] = ~(atp_dev.async[0]);
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outb(atp_dev.global_map[0], base_io + 0x35);
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atpdev->async[0] = ~(atpdev->async[0]);
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outb(atpdev->global_map[0], base_io + 0x35);
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shpnt = scsi_host_alloc(&atp870u_template, sizeof(struct atp_unit));
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if (!shpnt)
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return -ENOMEM;
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goto err_nomem;
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p = (struct atp_unit *)&shpnt->hostdata;
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atp_dev.host = shpnt;
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atp_dev.pdev = pdev;
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atpdev->host = shpnt;
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atpdev->pdev = pdev;
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pci_set_drvdata(pdev, p);
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memcpy(p, &atp_dev, sizeof atp_dev);
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memcpy(p, atpdev, sizeof(*atpdev));
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if (atp870u_init_tables(shpnt) < 0) {
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printk(KERN_ERR "Unable to allocate tables for Acard controller\n");
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goto unregister;
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@ -2798,24 +2801,24 @@ static int atp870u_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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printk(KERN_INFO " ACARD AEC-67162 PCI Ultra3 LVD Host Adapter: IO:%x, IRQ:%d.\n"
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, base_io, pdev->irq);
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atp_dev.pdev = pdev;
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atp_dev.dev_id = ent->device;
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atp_dev.baseport = base_io;
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atp_dev.ioport[0] = base_io + 0x80;
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atp_dev.ioport[1] = base_io + 0xc0;
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atp_dev.pciport[0] = base_io + 0x40;
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atp_dev.pciport[1] = base_io + 0x50;
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atpdev->pdev = pdev;
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atpdev->dev_id = ent->device;
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atpdev->baseport = base_io;
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atpdev->ioport[0] = base_io + 0x80;
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atpdev->ioport[1] = base_io + 0xc0;
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atpdev->pciport[0] = base_io + 0x40;
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atpdev->pciport[1] = base_io + 0x50;
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shpnt = scsi_host_alloc(&atp870u_template, sizeof(struct atp_unit));
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if (!shpnt)
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return -ENOMEM;
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goto err_nomem;
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p = (struct atp_unit *)&shpnt->hostdata;
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atp_dev.host = shpnt;
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atp_dev.pdev = pdev;
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atpdev->host = shpnt;
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atpdev->pdev = pdev;
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pci_set_drvdata(pdev, p);
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memcpy(p, &atp_dev, sizeof(struct atp_unit));
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memcpy(p, atpdev, sizeof(struct atp_unit));
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if (atp870u_init_tables(shpnt) < 0)
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goto unregister;
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@ -2974,33 +2977,33 @@ static int atp870u_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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printk(KERN_INFO " ACARD AEC-671X PCI Ultra/W SCSI-2/3 Host Adapter: %d "
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"IO:%x, IRQ:%d.\n", count, base_io, pdev->irq);
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atp_dev.ioport[0] = base_io;
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atp_dev.pciport[0] = base_io + 0x20;
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atp_dev.dev_id = ent->device;
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atpdev->ioport[0] = base_io;
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atpdev->pciport[0] = base_io + 0x20;
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atpdev->dev_id = ent->device;
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host_id &= 0x07;
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atp_dev.host_id[0] = host_id;
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atpdev->host_id[0] = host_id;
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tmport = base_io + 0x22;
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atp_dev.scam_on = inb(tmport);
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atpdev->scam_on = inb(tmport);
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tmport += 0x0b;
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atp_dev.global_map[0] = inb(tmport++);
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atp_dev.ultra_map[0] = inw(tmport);
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atpdev->global_map[0] = inb(tmport++);
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atpdev->ultra_map[0] = inw(tmport);
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if (atp_dev.ultra_map[0] == 0) {
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atp_dev.scam_on = 0x00;
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atp_dev.global_map[0] = 0x20;
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atp_dev.ultra_map[0] = 0xffff;
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if (atpdev->ultra_map[0] == 0) {
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atpdev->scam_on = 0x00;
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atpdev->global_map[0] = 0x20;
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atpdev->ultra_map[0] = 0xffff;
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}
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shpnt = scsi_host_alloc(&atp870u_template, sizeof(struct atp_unit));
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if (!shpnt)
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return -ENOMEM;
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goto err_nomem;
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p = (struct atp_unit *)&shpnt->hostdata;
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atp_dev.host = shpnt;
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atp_dev.pdev = pdev;
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atpdev->host = shpnt;
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atpdev->pdev = pdev;
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pci_set_drvdata(pdev, p);
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memcpy(p, &atp_dev, sizeof atp_dev);
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memcpy(p, atpdev, sizeof(*atpdev));
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if (atp870u_init_tables(shpnt) < 0)
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goto unregister;
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@ -3010,7 +3013,7 @@ static int atp870u_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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}
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spin_lock_irqsave(shpnt->host_lock, flags);
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if (atp_dev.chip_ver > 0x07) { /* check if atp876 chip then enable terminator */
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if (atpdev->chip_ver > 0x07) { /* check if atp876 chip then enable terminator */
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tmport = base_io + 0x3e;
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outb(0x00, tmport);
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}
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@ -3044,7 +3047,7 @@ static int atp870u_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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outb((inb(tmport) & 0xef), tmport);
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tmport++;
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outb((inb(tmport) | 0x20), tmport);
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if (atp_dev.chip_ver == 4)
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if (atpdev->chip_ver == 4)
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shpnt->max_id = 16;
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else
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shpnt->max_id = 8;
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@ -3093,6 +3096,12 @@ static int atp870u_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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printk("atp870u_prob:unregister\n");
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scsi_host_put(shpnt);
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return -1;
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err_eio:
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kfree(atpdev);
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return -EIO;
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err_nomem:
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kfree(atpdev);
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return -ENOMEM;
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}
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/* The abort command does not leave the device in a clean state where
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