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authorTom Rix <trix@redhat.com>2021-06-25 22:51:44 +0300
committerMoritz Fischer <mdf@kernel.org>2021-07-25 01:10:31 +0300
commit8ebab40fd8f1683140890a77fadf571db98686b8 (patch)
tree9aa518859ca4bc1e736097a2f3c0ad66c5bd34bb /drivers/fpga/fpga-mgr.c
parent72d935020ea81c0092c23b580352fe1310505c28 (diff)
downloadlinux-8ebab40fd8f1683140890a77fadf571db98686b8.tar.xz
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>
Diffstat (limited to 'drivers/fpga/fpga-mgr.c')
-rw-r--r--drivers/fpga/fpga-mgr.c15
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;
}