From: Alex Elder Date: Mon, 21 Apr 2014 21:53:03 +0000 (-0500) Subject: ARM: bcm: err, don't BUG() on SMC init failures X-Git-Tag: firefly_0821_release~176^2~3465^2~48^2~6^2~8 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=5c4cee2fe8de7c14e60502b02e7c3bc7acba0530;p=firefly-linux-kernel-4.4.55.git ARM: bcm: err, don't BUG() on SMC init failures Several conditions in bcm_kona_smc_init() are handled with BUG_ON(). That function is capable of returning an error, so do that instead. Also, don't assume of_get_address() returns a valid pointer. Signed-off-by: Alex Elder Reviewed-by: Tim Kryger Reviewed-by: Markus Mayer Reviewed-by: Matt Porter Signed-off-by: Matt Porter --- diff --git a/arch/arm/mach-bcm/bcm_kona_smc.c b/arch/arm/mach-bcm/bcm_kona_smc.c index d881c72ee878..ddc2f17217ee 100644 --- a/arch/arm/mach-bcm/bcm_kona_smc.c +++ b/arch/arm/mach-bcm/bcm_kona_smc.c @@ -45,6 +45,7 @@ static const struct of_device_id bcm_kona_smc_ids[] __initconst = { int __init bcm_kona_smc_init(void) { struct device_node *node; + const __be32 *prop_val; /* Read buffer addr and size from the device tree node */ node = of_find_matching_node(NULL, bcm_kona_smc_ids); @@ -52,12 +53,17 @@ int __init bcm_kona_smc_init(void) return -ENODEV; /* Don't care about size or flags of the DT node */ - bridge_data.buffer_addr = - be32_to_cpu(*of_get_address(node, 0, NULL, NULL)); - BUG_ON(!bridge_data.buffer_addr); + prop_val = of_get_address(node, 0, NULL, NULL); + if (!prop_val) + return -EINVAL; + + bridge_data.buffer_addr = be32_to_cpu(*prop_val); + if (!bridge_data.buffer_addr) + return -EINVAL; bridge_data.bounce = of_iomap(node, 0); - BUG_ON(!bridge_data.bounce); + if (!bridge_data.bounce) + return -ENOMEM; bridge_data.initialized = 1;