[ARM] vfp: fix leak of VFP_NAN_FLAG into FPSCR
The VFP code can leak VFP_NAN_FLAG into the FPSCR. It doesn't correspond
to any real FPSCR bit (and overlaps one of the exception flags).
Bug report from Daniel Jacobowitz
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/vfp/vfpdouble.c b/arch/arm/vfp/vfpdouble.c
index febd115..009038c 100644
--- a/arch/arm/vfp/vfpdouble.c
+++ b/arch/arm/vfp/vfpdouble.c
@@ -197,7 +197,7 @@
dd, d, exceptions);
vfp_put_double(dd, d);
}
- return exceptions & ~VFP_NAN_FLAG;
+ return exceptions;
}
/*
diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
index 22f3da4..37ff814 100644
--- a/arch/arm/vfp/vfpmodule.c
+++ b/arch/arm/vfp/vfpmodule.c
@@ -180,7 +180,7 @@
* emulate it.
*/
}
- return exceptions;
+ return exceptions & ~VFP_NAN_FLAG;
}
/*
diff --git a/arch/arm/vfp/vfpsingle.c b/arch/arm/vfp/vfpsingle.c
index 4ac27f1..dae2c2f 100644
--- a/arch/arm/vfp/vfpsingle.c
+++ b/arch/arm/vfp/vfpsingle.c
@@ -203,7 +203,7 @@
vfp_put_float(sd, d);
}
- return exceptions & ~VFP_NAN_FLAG;
+ return exceptions;
}
/*