On Wed, Jun 23, 2021 at 11:24:04AM -0700, trix@xxxxxxxxxx wrote:
> From: Tom Rix <trix@xxxxxxxxxx>
>
> An FPGA manager should not be required to provide a
> write_init() op if there is nothing for it do.
> So add a wrapper and move the op checking.
> Default to success.
>
> Signed-off-by: Tom Rix <trix@xxxxxxxxxx>
> ---
> drivers/fpga/fpga-mgr.c | 14 +++++++++++---
> 1 file changed, 11 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c
> index ecb4c3c795fa5..87bbb940c9504 100644
> --- a/drivers/fpga/fpga-mgr.c
> +++ b/drivers/fpga/fpga-mgr.c
> @@ -69,6 +69,14 @@ void fpga_image_info_free(struct fpga_image_info *info)
> }
> EXPORT_SYMBOL_GPL(fpga_image_info_free);
>
> +static int fpga_mgr_write_init(struct fpga_manager *mgr,
> + struct fpga_image_info *info,
> + const char *buf, size_t count)
> +{
> + if (mgr->mops && mgr->mops->write_init)
Maybe we don't have to check mgr->mops, it is already checked on
creation.
The same concern to all the following patches.
Thanks,
Yilun
> + return mgr->mops->write_init(mgr, info, buf, count);
> + return 0;
> +}
> /*
> * Call the low level driver's write_init function. This will do the
> * device-specific things to get the FPGA into the state where it is ready to
> @@ -83,9 +91,9 @@ static int fpga_mgr_write_init_buf(struct fpga_manager *mgr,
>
> mgr->state = FPGA_MGR_STATE_WRITE_INIT;
> if (!mgr->mops->initial_header_size)
> - ret = mgr->mops->write_init(mgr, info, NULL, 0);
> + ret = fpga_mgr_write_init(mgr, info, NULL, 0);
> else
> - ret = mgr->mops->write_init(
> + ret = fpga_mgr_write_init(
> mgr, info, buf, min(mgr->mops->initial_header_size, count));
>
> if (ret) {
> @@ -569,7 +577,7 @@ struct fpga_manager *fpga_mgr_create(struct device *parent, const char *name,
> int id, ret;
>
> if (!mops || !mops->write_complete || !mops->state ||
> - !mops->write_init || (!mops->write && !mops->write_sg) ||
> + (!mops->write && !mops->write_sg) ||
> (mops->write && mops->write_sg)) {
> dev_err(parent, "Attempt to register without fpga_manager_ops\n");
> return NULL;
> --
> 2.26.3
