[xlnx:master 1545/1550] drivers/misc/xilinx_sdfec.c:1038:31: sparse: dereference of noderef expression
kbuild test robot
fengguang.wu at intel.com
Fri Mar 23 16:58:31 PDT 2018
tree: https://github.com/Xilinx/linux-xlnx master
head: 6e1f0e8ae0acb992560a4e3206a372de271aa8b6
commit: a595ceb6c6d2a8d8517720e3757eb06b76859500 [1545/1550] misc: xilinx-sdfec: Add IOCTL XSDFEC_SET_ORDER
reproduce:
# apt-get install sparse
git checkout a595ceb6c6d2a8d8517720e3757eb06b76859500
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__
sparse warnings: (new ones prefixed by >>)
>> drivers/misc/xilinx_sdfec.c:1038:31: sparse: dereference of noderef expression
drivers/misc/xilinx_sdfec.c:1039:31: sparse: dereference of noderef expression
drivers/misc/xilinx_sdfec.c:1043:35: sparse: dereference of noderef expression
drivers/misc/xilinx_sdfec.c:1055:53: sparse: dereference of noderef expression
drivers/misc/xilinx_sdfec.c:1057:25: sparse: dereference of noderef expression
vim +1038 drivers/misc/xilinx_sdfec.c
1032
1033 static int
1034 xsdfec_set_order(struct xsdfec_dev *xsdfec, enum xsdfec_order __user order)
1035 {
1036 bool order_out_of_range;
1037
> 1038 order_out_of_range = (order <= XSDFEC_INVALID_ORDER) ||
1039 (order >= XSDFEC_ORDER_MAX);
1040 if (order_out_of_range) {
1041 dev_err(xsdfec->dev,
1042 "%s invalid order value %d for SDFEC%d",
1043 __func__, order, xsdfec->fec_id);
1044 return -EINVAL;
1045 }
1046
1047 /* Verify Device has not started */
1048 if (xsdfec->state == XSDFEC_STARTED) {
1049 dev_err(xsdfec->dev,
1050 "%s attempting to set Order while started for SDFEC%d",
1051 __func__, xsdfec->fec_id);
1052 return -EIO;
1053 }
1054
1055 xsdfec_regwrite(xsdfec, XSDFEC_ORDER_ADDR, (order - 1));
1056
1057 xsdfec->order = order;
1058
1059 return 0;
1060 }
1061
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