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authorLinus Torvalds <torvalds@linux-foundation.org>2016-09-03 12:31:37 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-09-03 12:31:37 -0700
commit2bece1a0106497d065fb7db77abc525d32d3bf04 (patch)
treed48089056e680afc6c68cbe46c095a82f27e8f86
parent593ee4edc51d99fadda9f6eea8c0201c59452de7 (diff)
parent744c6c37cc18705d19e179622f927f5b781fe9cc (diff)
downloadlinux-2bece1a0106497d065fb7db77abc525d32d3bf04.tar.bz2
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas: "arm64 and arm/perf fixes: - arm64 fix: debug exception unmasking on the CPU resume path - ARM PMU fixes: memory leak on error path and NULL pointer dereference" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: kernel: Fix unmasked debug exceptions when restoring mdscr_el1 drivers/perf: arm_pmu: Fix NULL pointer dereference during probe drivers/perf: arm_pmu: Fix leak in error path
-rw-r--r--arch/arm64/mm/proc.S9
-rw-r--r--drivers/perf/arm_pmu.c3
2 files changed, 11 insertions, 1 deletions
diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S
index 5bb61de23201..9d37e967fa19 100644
--- a/arch/arm64/mm/proc.S
+++ b/arch/arm64/mm/proc.S
@@ -100,7 +100,16 @@ ENTRY(cpu_do_resume)
msr tcr_el1, x8
msr vbar_el1, x9
+
+ /*
+ * __cpu_setup() cleared MDSCR_EL1.MDE and friends, before unmasking
+ * debug exceptions. By restoring MDSCR_EL1 here, we may take a debug
+ * exception. Mask them until local_dbg_restore() in cpu_suspend()
+ * resets them.
+ */
+ disable_dbg
msr mdscr_el1, x10
+
msr sctlr_el1, x12
/*
* Restore oslsr_el1 by writing oslar_el1
diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c
index c494613c1909..f5e1008a223d 100644
--- a/drivers/perf/arm_pmu.c
+++ b/drivers/perf/arm_pmu.c
@@ -925,6 +925,7 @@ static int of_pmu_irq_cfg(struct arm_pmu *pmu)
if (i > 0 && spi != using_spi) {
pr_err("PPI/SPI IRQ type mismatch for %s!\n",
dn->name);
+ of_node_put(dn);
kfree(irqs);
return -EINVAL;
}
@@ -969,7 +970,7 @@ static int of_pmu_irq_cfg(struct arm_pmu *pmu)
if (cpumask_weight(&pmu->supported_cpus) == 0) {
int irq = platform_get_irq(pdev, 0);
- if (irq_is_percpu(irq)) {
+ if (irq >= 0 && irq_is_percpu(irq)) {
/* If using PPIs, check the affinity of the partition */
int ret;