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path: root/drivers/fpga/dfl.c
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Diffstat (limited to 'drivers/fpga/dfl.c')
-rw-r--r--drivers/fpga/dfl.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c
index c99b78ee008a..f86666cf2c6a 100644
--- a/drivers/fpga/dfl.c
+++ b/drivers/fpga/dfl.c
@@ -1019,16 +1019,18 @@ create_feature_instance(struct build_feature_devs_info *binfo,
{
unsigned int irq_base, nr_irqs;
struct dfl_feature_info *finfo;
+ u8 revision = 0;
int ret;
- u8 revision;
u64 v;
- v = readq(binfo->ioaddr + ofst);
- revision = FIELD_GET(DFH_REVISION, v);
+ if (fid != FEATURE_ID_AFU) {
+ v = readq(binfo->ioaddr + ofst);
+ revision = FIELD_GET(DFH_REVISION, v);
- /* read feature size and id if inputs are invalid */
- size = size ? size : feature_size(v);
- fid = fid ? fid : feature_id(v);
+ /* read feature size and id if inputs are invalid */
+ size = size ? size : feature_size(v);
+ fid = fid ? fid : feature_id(v);
+ }
if (binfo->len - ofst < size)
return -EINVAL;