From: Aaro Koskinen Date: Fri, 1 Nov 2013 15:06:04 +0000 (+0200) Subject: MIPS: cavium-octeon: fix early boot hang on EBH5600 board X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b2e4f1560f7388f8157dd2c828211abbfad0e806;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git MIPS: cavium-octeon: fix early boot hang on EBH5600 board The boot hangs early on EBH5600 board when octeon_fdt_pip_iface() is trying enumerate a non-existant interface. The actual hang happens in cvmx_helper_interface_get_mode(): mode.u64 = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface)); when interface == 4. We can avoid this situation by first checking that the interface exists in the DTB. Signed-off-by: Aaro Koskinen Acked-by: David Daney Signed-off-by: John Crispin Patchwork: http://patchwork.linux-mips.org/patch/6101/ --- diff --git a/arch/mips/cavium-octeon/octeon-platform.c b/arch/mips/cavium-octeon/octeon-platform.c index 1830874ff1e2..f68c75ab8ece 100644 --- a/arch/mips/cavium-octeon/octeon-platform.c +++ b/arch/mips/cavium-octeon/octeon-platform.c @@ -336,14 +336,14 @@ static void __init octeon_fdt_pip_iface(int pip, int idx, u64 *pmac) int p; int count = 0; - if (cvmx_helper_interface_enumerate(idx) == 0) - count = cvmx_helper_ports_on_interface(idx); - snprintf(name_buffer, sizeof(name_buffer), "interface@%d", idx); iface = fdt_subnode_offset(initial_boot_params, pip, name_buffer); if (iface < 0) return; + if (cvmx_helper_interface_enumerate(idx) == 0) + count = cvmx_helper_ports_on_interface(idx); + for (p = 0; p < 16; p++) octeon_fdt_pip_port(iface, idx, p, count - 1, pmac); }