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fpga: fpga-mgr: wrap the write() op

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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>
This commit is contained in:
Tom Rix 2021-06-25 12:51:44 -07:00 committed by Moritz Fischer
parent 72d935020e
commit 8ebab40fd8
1 changed files with 10 additions and 5 deletions
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15
drivers/fpga/fpga-mgr.c
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@ -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;
}