diff options
| author | Tom Rix <trix@redhat.com> | 2021-06-25 21:51:44 +0200 |
|---|---|---|
| committer | Moritz Fischer <mdf@kernel.org> | 2021-07-25 00:10:31 +0200 |
| commit | 8ebab40fd8f1683140890a77fadf571db98686b8 (patch) | |
| tree | 9aa518859ca4bc1e736097a2f3c0ad66c5bd34bb | |
| parent | fpga: fpga-mgr: make write_complete() op optional (diff) | |
| download | linux-8ebab40fd8f1683140890a77fadf571db98686b8.tar.xz linux-8ebab40fd8f1683140890a77fadf571db98686b8.zip | |
fpga: fpga-mgr: wrap the write() op
An FPGA manager should not be required to provide a
write function. Move the op check to the wrapper.
Default to -EOPNOTSUP so its users will fail
gracefully.
[mdf@kernel.org: Reworded message]
Signed-off-by: Tom Rix <trix@redhat.com>
Signed-off-by: Moritz Fischer <mdf@kernel.org>
| -rw-r--r-- | drivers/fpga/fpga-mgr.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c index 05a69ab3ecb9..8d5536d74808 100644 --- a/drivers/fpga/fpga-mgr.c +++ b/drivers/fpga/fpga-mgr.c @@ -25,6 +25,13 @@ struct fpga_mgr_devres { struct fpga_manager *mgr; }; +static inline int fpga_mgr_write(struct fpga_manager *mgr, const char *buf, size_t count) +{ + if (mgr->mops->write) + return mgr->mops->write(mgr, buf, count); + return -EOPNOTSUPP; +} + /* * After all the FPGA image has been written, do the device specific steps to * finish and set the FPGA into operating mode. @@ -204,7 +211,7 @@ static int fpga_mgr_buf_load_sg(struct fpga_manager *mgr, sg_miter_start(&miter, sgt->sgl, sgt->nents, SG_MITER_FROM_SG); while (sg_miter_next(&miter)) { - ret = mgr->mops->write(mgr, miter.addr, miter.length); + ret = fpga_mgr_write(mgr, miter.addr, miter.length); if (ret) break; } @@ -234,7 +241,7 @@ static int fpga_mgr_buf_load_mapped(struct fpga_manager *mgr, * Write the FPGA image to the FPGA. */ mgr->state = FPGA_MGR_STATE_WRITE; - ret = mgr->mops->write(mgr, buf, count); + ret = fpga_mgr_write(mgr, buf, count); if (ret) { dev_err(&mgr->dev, "Error while writing image data to FPGA\n"); mgr->state = FPGA_MGR_STATE_WRITE_ERR; @@ -578,9 +585,7 @@ struct fpga_manager *fpga_mgr_create(struct device *parent, const char *name, struct fpga_manager *mgr; int id, ret; - if (!mops || !mops->state || - (!mops->write && !mops->write_sg) || - (mops->write && mops->write_sg)) { + if (!mops || !mops->state) { dev_err(parent, "Attempt to register without fpga_manager_ops\n"); return NULL; } |