MIPS: Fix error values in case of bad_stack

We want EFAULT, not -<syscall number>

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-kernel@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1699/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/kernel/scall32-o32.S b/arch/mips/kernel/scall32-o32.S
index 73a061e..84b4179 100644 (file)
--- a/arch/mips/kernel/scall32-o32.S
+++ b/arch/mips/kernel/scall32-o32.S
@@ -169,7 +169,7 @@ stackargs:
         * We probably should handle this case a bit more drastic.
         */
 bad_stack:
-       negu    v0                              # error
+       li      v0, EFAULT
        sw      v0, PT_R2(sp)
        li      t0, 1                           # set error flag
        sw      t0, PT_R7(sp)

diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 7ce0a36..d2bc285 100644 (file)
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -156,7 +156,7 @@ trace_a_syscall:
         * The stackpointer for a call with more than 4 arguments is bad.
         */
 bad_stack:
-       dnegu   v0                      # error
+       li      v0, EFAULT
        sd      v0, PT_R2(sp)
        li      t0, 1                   # set error flag
        sd      t0, PT_R7(sp)