From c41d4e3e688e338418311f449a4c68f6cb8eabbb Mon Sep 17 00:00:00 2001 From: Michael Holzheu Date: Thu, 31 May 2007 17:38:01 +0200 Subject: [PATCH] [S390] Add exception handler for diagnose 224 To be able to run with the diagnose 224 switched off, a potential specification exception has to be handled. Signed-off-by: Michael Holzheu Signed-off-by: Martin Schwidefsky --- arch/s390/hypfs/hypfs_diag.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) diff --git a/arch/s390/hypfs/hypfs_diag.c b/arch/s390/hypfs/hypfs_diag.c index 2782cf9da5b4..b9a1ce1f28e4 100644 --- a/arch/s390/hypfs/hypfs_diag.c +++ b/arch/s390/hypfs/hypfs_diag.c @@ -481,9 +481,17 @@ out: /* Diagnose 224 functions */ -static void diag224(void *ptr) +static int diag224(void *ptr) { - asm volatile("diag %0,%1,0x224" : :"d" (0), "d"(ptr) : "memory"); + int rc = -ENOTSUPP; + + asm volatile( + " diag %1,%2,0x224\n" + "0: lhi %0,0x0\n" + "1:\n" + EX_TABLE(0b,1b) + : "+d" (rc) :"d" (0), "d" (ptr) : "memory"); + return rc; } static int diag224_get_name_table(void) @@ -492,7 +500,10 @@ static int diag224_get_name_table(void) diag224_cpu_names = kmalloc(PAGE_SIZE, GFP_KERNEL | GFP_DMA); if (!diag224_cpu_names) return -ENOMEM; - diag224(diag224_cpu_names); + if (diag224(diag224_cpu_names)) { + kfree(diag224_cpu_names); + return -ENOTSUPP; + } EBCASC(diag224_cpu_names + 16, (*diag224_cpu_names + 1) * 16); return 0; }