The patch titled
Char: stallion, brd struct locking
has been added to the -mm tree. Its filename is
char-stallion-brd-struct-locking.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: Char: stallion, brd struct locking
From: Jiri Slaby <jirislaby@xxxxxxxxx>
Since assigning of stl_brds[brdnr] is racy, add locking to this critical
section.
Signed-off-by: Jiri Slaby <jirislaby@xxxxxxxxx>
Cc: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/char/stallion.c | 18 +++++++++++++-----
1 files changed, 13 insertions(+), 5 deletions(-)
diff -puN drivers/char/stallion.c~char-stallion-brd-struct-locking drivers/char/stallion.c
--- a/drivers/char/stallion.c~char-stallion-brd-struct-locking
+++ a/drivers/char/stallion.c
@@ -136,6 +136,7 @@ static char stl_unwanted[SC26198_RXFIFO
/*****************************************************************************/
+static DEFINE_MUTEX(stl_brdslock);
static struct stlbrd *stl_brds[STL_MAXBRDS];
/*
@@ -2305,7 +2306,6 @@ static int __devinit stl_brdinit(struct
goto err;
}
- stl_brds[brdp->brdnr] = brdp;
if ((brdp->state & BRD_FOUND) == 0) {
printk("STALLION: %s board not found, board=%d io=%x irq=%d\n",
stl_brdnames[brdp->brdtype], brdp->brdnr,
@@ -2331,8 +2331,6 @@ err_free:
release_region(brdp->ioaddr1, brdp->iosize1);
if (brdp->iosize2 > 0)
release_region(brdp->ioaddr2, brdp->iosize2);
-
- stl_brds[brdp->brdnr] = NULL;
err:
return retval;
}
@@ -2385,12 +2383,17 @@ static int __devinit stl_pciprobe(struct
retval = -ENOMEM;
goto err;
}
+ mutex_lock(&stl_brdslock);
brdp->brdnr = stl_getbrdnr();
if (brdp->brdnr < 0) {
dev_err(&pdev->dev, "too many boards found, "
"maximum supported %d\n", STL_MAXBRDS);
+ mutex_unlock(&stl_brdslock);
goto err_fr;
}
+ stl_brds[brdp->brdnr] = brdp;
+ mutex_unlock(&stl_brdslock);
+
brdp->brdtype = brdtype;
brdp->state |= STL_PROBED;
@@ -2419,11 +2422,13 @@ static int __devinit stl_pciprobe(struct
brdp->irq = pdev->irq;
retval = stl_brdinit(brdp);
if (retval)
- goto err_fr;
+ goto err_null;
pci_set_drvdata(pdev, brdp);
return 0;
+err_null:
+ stl_brds[brdp->brdnr] = NULL;
err_fr:
kfree(brdp);
err:
@@ -4737,10 +4742,13 @@ static int __init stallion_module_init(v
brdp->irqtype = conf.irqtype;
if (stl_brdinit(brdp))
kfree(brdp);
- else
+ else {
+ stl_brds[brdp->brdnr] = brdp;
stl_nrbrds = i + 1;
+ }
}
+ /* this has to be _after_ isa finding because of locking */
retval = pci_register_driver(&stl_pcidriver);
if (retval && stl_nrbrds == 0)
goto err;
_
Patches currently in -mm which might be from jirislaby@xxxxxxxxx are
mxser-correct-tty-driver-name.patch
pci-mxser-pci-refcounts.patch
mxser-make-an-experimental-clone.patch
char-mxser_new-correct-include-file.patch
char-mxser_new-upgrade-to-191.patch
char-mxser_new-rework-to-allow-dynamic-structs.patch
char-mxser_new-use-__devinit-macros.patch
char-mxser_new-pci_request_region-for-pci-regions.patch
char-mxser_new-check-request_region-retvals.patch
char-mxser_new-kill-unneeded-memsets.patch
char-mxser_new-revert-spin_lock-changes.patch
char-mxser_new-remove-request-for-testers-line.patch
char-mxser_new-debug-printk-dependent-on-debug.patch
char-mxser_new-alter-license-terms.patch
char-mxser_new-code-upside-down.patch
char-mxser_new-cmspar-is-defined.patch
char-remove-unneded-termbits-redefinitions-mxser_new.patch
char-mxser_new-eliminate-tty-ldisc-deref.patch
char-mxser_new-testbit-for-bit-testing.patch
char-mxser_new-correct-fail-paths.patch
char-mxser_new-dont-check-tty_unregister-retval.patch
char-mxser_new-compress-isa-finding.patch
char-mxser_new-register-tty-devices-on-the-fly.patch
char-mxser_new-compact-structures-round2.patch
char-mxser_new-reverse-if-else-paths-patch.patch
char-mxser_new-comments-cleanup.patch
char-mxser_new-correct-intr-handler-proto.patch
char-mxser_new-delete-ttys-and-termios.patch
char-mxser_new-pci-probing.patch
char-mxser_new-clean-macros.patch
maintainers-add-me-to-isicom-mxser.patch
mxser_new-correct-tty-driver-name.patch
char-stallion-use-pr_debug-macro.patch
char-stallion-remove-unneeded-casts.patch
char-stallion-kill-typedefs.patch
char-stallion-move-init-deinit.patch
char-stallion-uninline-functions.patch
char-stallion-mark-functions-as-init.patch
char-stallion-remove-many-prototypes.patch
char-isicom-expand-function.patch
char-isicom-rename-init-function.patch
char-isicom-remove-isa-code.patch
char-isicom-remove-unneeded-memset.patch
char-isicom-move-to-tty_register_device.patch
char-isicom-use-pci_request_region.patch
char-isicom-check-kmalloc-retval.patch
char-isicom-use-completion.patch
char-isicom-simplify-timer.patch
char-isicom-remove-cvs-stuff.patch
char-isicom-fix-tty-index-check.patch
char-sx-convert-to-pci-probing.patch
char-sx-use-kcalloc.patch
char-sx-mark-functions-as-devinit.patch
char-sx-use-eisa-probing.patch
char-sx-ifdef-isa-code.patch
char-sx-lock-boards-struct.patch
char-sx-remove-duplicite-code.patch
char-sx-whitespace-cleanup.patch
char-sx-simplify-timer-logic.patch
char-sx-fix-return-in-module-init.patch
char-sx-use-pci_iomap.patch
char-sx-request-regions.patch
char-stallion-convert-to-pci-probing.patch
char-stallion-prints-cleanup.patch
char-stallion-implement-fail-paths.patch
char-stallion-correct-__init-macros.patch
char-stallion-functions-cleanup.patch
char-stallion-fix-fail-paths.patch
char-stallion-brd-struct-locking.patch
char-stallion-remove-syntactic-sugar.patch
char-stallion-variables-cleanup.patch
char-stallion-use-dynamic-dev.patch
-
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