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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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[PATCH] Char: istallion, correct fail paths
Check more retvals and react somehow. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jiri Slaby
Linus Torvalds
parent
390141728f
commit
8f8f5a5808
@ -776,11 +776,6 @@ static void __exit istallion_module_exit(void)
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}
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i = tty_unregister_driver(stli_serial);
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if (i) {
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printk("STALLION: failed to un-register tty driver, "
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"errno=%d\n", -i);
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return;
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}
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put_tty_driver(stli_serial);
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for (j = 0; j < 4; j++)
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class_device_destroy(istallion_class, MKDEV(STL_SIOMEMMAJOR, j));
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@ -3278,15 +3273,16 @@ static int stli_initecp(struct stlibrd *brdp)
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cdkecpsig_t __iomem *sigsp;
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unsigned int status, nxtid;
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char *name;
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int panelnr, nrports;
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int retval, panelnr, nrports;
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if (!request_region(brdp->iobase, brdp->iosize, "istallion"))
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return -EIO;
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if ((brdp->iobase == 0) || (brdp->memaddr == 0))
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{
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release_region(brdp->iobase, brdp->iosize);
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return -ENODEV;
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if ((brdp->iobase == 0) || (brdp->memaddr == 0)) {
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retval = -ENODEV;
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goto err;
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}
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if (!request_region(brdp->iobase, brdp->iosize, "istallion")) {
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retval = -EIO;
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goto err;
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}
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brdp->iosize = ECP_IOSIZE;
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@ -3350,8 +3346,8 @@ static int stli_initecp(struct stlibrd *brdp)
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break;
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default:
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release_region(brdp->iobase, brdp->iosize);
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return -EINVAL;
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retval = -EINVAL;
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goto err_reg;
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}
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/*
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@ -3363,10 +3359,9 @@ static int stli_initecp(struct stlibrd *brdp)
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EBRDINIT(brdp);
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brdp->membase = ioremap(brdp->memaddr, brdp->memsize);
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if (brdp->membase == NULL)
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{
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release_region(brdp->iobase, brdp->iosize);
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return -ENOMEM;
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if (brdp->membase == NULL) {
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retval = -ENOMEM;
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goto err_reg;
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}
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/*
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@ -3379,12 +3374,9 @@ static int stli_initecp(struct stlibrd *brdp)
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memcpy_fromio(&sig, sigsp, sizeof(cdkecpsig_t));
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EBRDDISABLE(brdp);
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if (sig.magic != cpu_to_le32(ECP_MAGIC))
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{
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release_region(brdp->iobase, brdp->iosize);
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iounmap(brdp->membase);
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brdp->membase = NULL;
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return -ENODEV;
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if (sig.magic != cpu_to_le32(ECP_MAGIC)) {
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retval = -ENODEV;
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goto err_unmap;
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}
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/*
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@ -3409,6 +3401,13 @@ static int stli_initecp(struct stlibrd *brdp)
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brdp->state |= BST_FOUND;
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return 0;
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err_unmap:
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iounmap(brdp->membase);
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brdp->membase = NULL;
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err_reg:
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release_region(brdp->iobase, brdp->iosize);
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err:
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return retval;
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}
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/*****************************************************************************/
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@ -3423,18 +3422,22 @@ static int stli_initonb(struct stlibrd *brdp)
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cdkonbsig_t sig;
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cdkonbsig_t __iomem *sigsp;
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char *name;
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int i;
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int i, retval;
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/*
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* Do a basic sanity check on the IO and memory addresses.
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*/
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if (brdp->iobase == 0 || brdp->memaddr == 0)
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return -ENODEV;
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if (brdp->iobase == 0 || brdp->memaddr == 0) {
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retval = -ENODEV;
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goto err;
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}
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brdp->iosize = ONB_IOSIZE;
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if (!request_region(brdp->iobase, brdp->iosize, "istallion"))
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return -EIO;
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if (!request_region(brdp->iobase, brdp->iosize, "istallion")) {
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retval = -EIO;
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goto err;
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}
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/*
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* Based on the specific board type setup the common vars to access
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@ -3500,8 +3503,8 @@ static int stli_initonb(struct stlibrd *brdp)
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break;
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default:
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release_region(brdp->iobase, brdp->iosize);
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return -EINVAL;
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retval = -EINVAL;
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goto err_reg;
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}
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/*
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@ -3513,10 +3516,9 @@ static int stli_initonb(struct stlibrd *brdp)
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EBRDINIT(brdp);
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brdp->membase = ioremap(brdp->memaddr, brdp->memsize);
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if (brdp->membase == NULL)
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{
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release_region(brdp->iobase, brdp->iosize);
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return -ENOMEM;
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if (brdp->membase == NULL) {
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retval = -ENOMEM;
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goto err_reg;
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}
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/*
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@ -3532,12 +3534,9 @@ static int stli_initonb(struct stlibrd *brdp)
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if (sig.magic0 != cpu_to_le16(ONB_MAGIC0) ||
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sig.magic1 != cpu_to_le16(ONB_MAGIC1) ||
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sig.magic2 != cpu_to_le16(ONB_MAGIC2) ||
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sig.magic3 != cpu_to_le16(ONB_MAGIC3))
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{
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release_region(brdp->iobase, brdp->iosize);
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iounmap(brdp->membase);
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brdp->membase = NULL;
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return -ENODEV;
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sig.magic3 != cpu_to_le16(ONB_MAGIC3)) {
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retval = -ENODEV;
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goto err_unmap;
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}
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/*
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@ -3559,6 +3558,13 @@ static int stli_initonb(struct stlibrd *brdp)
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brdp->state |= BST_FOUND;
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return 0;
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err_unmap:
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iounmap(brdp->membase);
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brdp->membase = NULL;
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err_reg:
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release_region(brdp->iobase, brdp->iosize);
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err:
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return retval;
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}
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/*****************************************************************************/
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@ -3679,33 +3685,30 @@ static int stli_startbrd(struct stlibrd *brdp)
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static int __devinit stli_brdinit(struct stlibrd *brdp)
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{
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int retval;
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switch (brdp->brdtype) {
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case BRD_ECP:
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case BRD_ECPE:
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case BRD_ECPMC:
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case BRD_ECPPCI:
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stli_initecp(brdp);
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retval = stli_initecp(brdp);
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break;
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case BRD_ONBOARD:
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case BRD_ONBOARDE:
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case BRD_ONBOARD2:
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case BRD_BRUMBY4:
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case BRD_STALLION:
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stli_initonb(brdp);
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retval = stli_initonb(brdp);
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break;
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default:
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printk(KERN_ERR "STALLION: board=%d is unknown board "
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"type=%d\n", brdp->brdnr, brdp->brdtype);
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return -ENODEV;
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retval = -ENODEV;
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}
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if ((brdp->state & BST_FOUND) == 0) {
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printk(KERN_ERR "STALLION: %s board not found, board=%d "
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"io=%x mem=%x\n",
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stli_brdnames[brdp->brdtype], brdp->brdnr,
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brdp->iobase, (int) brdp->memaddr);
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return -ENODEV;
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}
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if (retval)
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return retval;
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stli_initports(brdp);
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printk(KERN_INFO "STALLION: %s found, board=%d io=%x mem=%x "
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@ -3842,7 +3845,7 @@ static int stli_findeisabrds(void)
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{
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struct stlibrd *brdp;
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unsigned int iobase, eid, i;
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int brdnr;
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int brdnr, found = 0;
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/*
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* Firstly check if this is an EISA system. If this is not an EISA system then
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@ -3880,10 +3883,10 @@ static int stli_findeisabrds(void)
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* Allocate a board structure and initialize it.
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*/
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if ((brdp = stli_allocbrd()) == NULL)
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return -ENOMEM;
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return found ? : -ENOMEM;
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brdnr = stli_getbrdnr();
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if (brdnr < 0)
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return -ENOMEM;
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return found ? : -ENOMEM;
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brdp->brdnr = (unsigned int)brdnr;
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eid = inb(iobase + 0xc82);
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if (eid == ECP_EISAID)
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@ -3896,11 +3899,16 @@ static int stli_findeisabrds(void)
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outb(0x1, (iobase + 0xc84));
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if (stli_eisamemprobe(brdp))
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outb(0, (iobase + 0xc84));
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if (stli_brdinit(brdp) < 0) {
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kfree(brdp);
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continue;
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}
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stli_brds[brdp->brdnr] = brdp;
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stli_brdinit(brdp);
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found++;
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}
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return 0;
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return found;
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}
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#else
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static inline int stli_findeisabrds(void) { return 0; }
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@ -4020,7 +4028,7 @@ static int stli_initbrds(void)
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{
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struct stlibrd *brdp, *nxtbrdp;
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struct stlconf conf;
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unsigned int i, j;
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unsigned int i, j, found = 0;
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int retval;
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for (stli_nrbrds = 0; stli_nrbrds < ARRAY_SIZE(stli_brdsp);
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@ -4034,14 +4042,24 @@ static int stli_initbrds(void)
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brdp->brdtype = conf.brdtype;
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brdp->iobase = conf.ioaddr1;
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brdp->memaddr = conf.memaddr;
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if (stli_brdinit(brdp) < 0) {
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kfree(brdp);
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continue;
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}
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stli_brds[brdp->brdnr] = brdp;
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stli_brdinit(brdp);
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found++;
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}
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stli_findeisabrds();
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retval = stli_findeisabrds();
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if (retval > 0)
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found += retval;
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retval = pci_register_driver(&stli_pcidriver);
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/* TODO: check retval and do something */
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if (retval && found == 0) {
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printk(KERN_ERR "Neither isa nor eisa cards found nor pci "
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"driver can be registered!\n");
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goto err;
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}
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/*
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* All found boards are initialized. Now for a little optimization, if
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@ -4082,6 +4100,8 @@ static int stli_initbrds(void)
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}
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return 0;
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err:
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return retval;
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}
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/*****************************************************************************/
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