From df3ed932394488e57e72dd0e73c224d1804fdc8f Mon Sep 17 00:00:00 2001 From: Rob Herring Date: Thu, 11 May 2017 10:15:10 -0500 Subject: Partially Revert "of: fix sparse warnings in fdt, irq, reserved mem, and resolver code" A change to function pointers that was meant to address a sparse warning turned out to cause hundreds of new gcc-7 warnings: include/linux/of_irq.h:11:13: error: type qualifiers ignored on function return type [-Werror=ignored-qualifiers] drivers/of/of_reserved_mem.c: In function '__reserved_mem_init_node': drivers/of/of_reserved_mem.c:200:7: error: type qualifiers ignored on function return type [-Werror=ignored-qualifiers] int const (*initfn)(struct reserved_mem *rmem) = i->data; Turns out the sparse warnings were spurious and have been fixed in upstream sparse since 0.5.0 in commit "sparse: treat function pointers as pointers to const data". This partially reverts commit 17a70355ea576843a7ac851f1db26872a50b2850. Fixes: 17a70355ea57 ("of: fix sparse warnings in fdt, irq, reserved mem, and resolver code") Reported-by: Arnd Bergmann Signed-off-by: Rob Herring --- drivers/of/of_reserved_mem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/of') diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c index 4dec07ea510f..d507c3569a88 100644 --- a/drivers/of/of_reserved_mem.c +++ b/drivers/of/of_reserved_mem.c @@ -197,7 +197,7 @@ static int __init __reserved_mem_init_node(struct reserved_mem *rmem) const struct of_device_id *i; for (i = __reservedmem_of_table; i < &__rmem_of_table_sentinel; i++) { - int const (*initfn)(struct reserved_mem *rmem) = i->data; + reservedmem_of_init_fn initfn = i->data; const char *compat = i->compatible; if (!of_flat_dt_is_compatible(rmem->fdt_node, compat)) -- cgit v1.2.3-59-g8ed1b From 49e67dd17649b60b4d54966e18ec9c80198227f0 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Wed, 17 May 2017 17:29:09 +0200 Subject: of: fdt: add missing allocation-failure check The memory allocator passed to __unflatten_device_tree() (e.g. a wrapped kzalloc) can fail so add the missing sanity check to avoid dereferencing a NULL pointer. Fixes: fe14042358fa ("of/flattree: Refactor unflatten_device_tree and add fdt_unflatten_tree") Cc: stable # 2.6.38 Signed-off-by: Johan Hovold Signed-off-by: Rob Herring --- drivers/of/fdt.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/of') diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index a0972219ccfc..0373ae49d24d 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -507,6 +507,9 @@ void *__unflatten_device_tree(const void *blob, /* Allocate memory for the expanded device tree */ mem = dt_alloc(size + 4, __alignof__(struct device_node)); + if (!mem) + return NULL; + memset(mem, 0, size); *(__be32 *)(mem + size) = cpu_to_be32(0xdeadbeef); -- cgit v1.2.3-59-g8ed1b