diff options
| author | Jiri Slaby <jirislaby@gmail.com> | 2006-12-08 02:39:21 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-08 08:29:00 -0800 |
| commit | b103b5cfcb8e6703b40124da631adfdd1470d878 (patch) | |
| tree | 8d9f85819f51ce3961050b2dcc6c41da734bd1f7 /drivers/char | |
| parent | a00f33f3ab6385ef24f6e88bf970e8ac32b24099 (diff) | |
| download | blackbird-obmc-linux-b103b5cfcb8e6703b40124da631adfdd1470d878.tar.gz blackbird-obmc-linux-b103b5cfcb8e6703b40124da631adfdd1470d878.zip | |
[PATCH] Char: istallion, brdnr locking
Kill possible race when getting brdnr by locking.
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>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/istallion.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/char/istallion.c b/drivers/char/istallion.c index 40c256d787fc..de869241baa0 100644 --- a/drivers/char/istallion.c +++ b/drivers/char/istallion.c @@ -189,6 +189,7 @@ static struct asystats stli_cdkstats; /*****************************************************************************/ +static DEFINE_MUTEX(stli_brdslock); static struct stlibrd *stli_brds[STL_MAXBRDS]; static int stli_shared; @@ -3677,8 +3678,6 @@ stli_donestartup: static int __devinit stli_brdinit(struct stlibrd *brdp) { - stli_brds[brdp->brdnr] = brdp; - switch (brdp->brdtype) { case BRD_ECP: case BRD_ECPE: @@ -3896,6 +3895,7 @@ static int stli_findeisabrds(void) outb(0x1, (iobase + 0xc84)); if (stli_eisamemprobe(brdp)) outb(0, (iobase + 0xc84)); + stli_brds[brdp->brdnr] = brdp; stli_brdinit(brdp); } @@ -3933,14 +3933,18 @@ static int __devinit stli_pciprobe(struct pci_dev *pdev, retval = -ENOMEM; goto err; } + mutex_lock(&stli_brdslock); brdnr = stli_getbrdnr(); - if (brdnr < 0) { /* TODO: locking */ + if (brdnr < 0) { printk(KERN_INFO "STALLION: too many boards found, " "maximum supported %d\n", STL_MAXBRDS); + mutex_unlock(&stli_brdslock); retval = -EIO; goto err_fr; } brdp->brdnr = (unsigned int)brdnr; + stli_brds[brdp->brdnr] = brdp; + mutex_unlock(&stli_brdslock); brdp->brdtype = BRD_ECPPCI; /* * We have all resources from the board, so lets setup the actual @@ -3950,11 +3954,13 @@ static int __devinit stli_pciprobe(struct pci_dev *pdev, brdp->memaddr = pci_resource_start(pdev, 2); retval = stli_brdinit(brdp); if (retval) - goto err_fr; + goto err_null; pci_set_drvdata(pdev, brdp); return 0; +err_null: + stli_brds[brdp->brdnr] = NULL; err_fr: kfree(brdp); err: @@ -4026,6 +4032,7 @@ static int stli_initbrds(void) brdp->brdtype = conf.brdtype; brdp->iobase = conf.ioaddr1; brdp->memaddr = conf.memaddr; + stli_brds[brdp->brdnr] = brdp; stli_brdinit(brdp); } |
