summaryrefslogtreecommitdiff
path: root/drivers/of
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2012-07-23 18:54:23 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-23 18:54:23 -0700
commit83c7f72259ea4bd0561e2f2762d97ee2888126ce (patch)
treec8b181e9f9a0bb061f5ab63fabb98197d7aee19a /drivers/of
parente05644e17e744315bce12b0948cdc36910b9a76e (diff)
parent574ce79cea9d3fda109ffcc82f81733de4740e5c (diff)
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Pull powerpc updates from Benjamin Herrenschmidt: "Notable highlights: - iommu improvements from Anton removing the per-iommu global lock in favor of dividing the DMA space into pools, each with its own lock, and hashed on the CPU number. Along with making the locking more fine grained, this gives significant improvements in multiqueue networking scalability. - Still from Anton, we know provide a vdso based variant of getcpu which makes sched_getcpu with the appropriate glibc patch something like 18 times faster. - More anton goodness (he's been busy !) in other areas such as a faster __clear_user and copy_page on P7, various perf fixes to improve sampling quality, etc... - One more step toward removing legacy i2c interfaces by using new device-tree based probing of platform devices for the AOA audio drivers - A nice series of patches from Michael Neuling that helps avoiding confusion between register numbers and litterals in assembly code, trying to enforce the use of "%rN" register names in gas rather than plain numbers. - A pile of FSL updates - The usual bunch of small fixes, cleanups etc... You may spot a change to drivers/char/mem. The patch got no comment or ack from outside, it's a trivial patch to allow the architecture to skip creating /dev/port, which we use to disable it on ppc64 that don't have a legacy brige. On those, IO ports 0...64K are not mapped in kernel space at all, so accesses to /dev/port cause oopses (and yes, distros -still- ship userspace that bangs hard coded ports such as kbdrate)." * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (106 commits) powerpc/mpic: Create a revmap with enough entries for IPIs and timers Remove stale .rej file powerpc/iommu: Fix iommu pool initialization powerpc/eeh: Check handle_eeh_events() return value powerpc/85xx: Add phy nodes in SGMII mode for MPC8536/44/72DS & P2020DS powerpc/e500: add paravirt QEMU platform powerpc/mpc85xx_ds: convert to unified PCI init powerpc/fsl-pci: get PCI init out of board files powerpc/85xx: Update corenet64_smp_defconfig powerpc/85xx: Update corenet32_smp_defconfig powerpc/85xx: Rename P1021RDB-PC device trees to be consistent powerpc/watchdog: move booke watchdog param related code to setup-common.c sound/aoa: Adapt to new i2c probing scheme i2c/powermac: Improve detection of devices from device-tree powerpc: Disable /dev/port interface on systems without an ISA bridge of: Improve prom_update_property() function powerpc: Add "memory" attribute for mfmsr() powerpc/ftrace: Fix assembly trampoline register usage powerpc/hw_breakpoints: Fix incorrect pointer access powerpc: Put the gpr save/restore functions in their own section ...
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/base.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c
index d9bfd49b1935..a14f109dcd13 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -1051,7 +1051,8 @@ int prom_remove_property(struct device_node *np, struct property *prop)
}
/*
- * prom_update_property - Update a property in a node.
+ * prom_update_property - Update a property in a node, if the property does
+ * not exist, add it.
*
* Note that we don't actually remove it, since we have given out
* who-knows-how-many pointers to the data using get-property.
@@ -1059,13 +1060,19 @@ int prom_remove_property(struct device_node *np, struct property *prop)
* and add the new property to the property list
*/
int prom_update_property(struct device_node *np,
- struct property *newprop,
- struct property *oldprop)
+ struct property *newprop)
{
- struct property **next;
+ struct property **next, *oldprop;
unsigned long flags;
int found = 0;
+ if (!newprop->name)
+ return -EINVAL;
+
+ oldprop = of_find_property(np, newprop->name, NULL);
+ if (!oldprop)
+ return prom_add_property(np, newprop);
+
write_lock_irqsave(&devtree_lock, flags);
next = &np->properties;
while (*next) {