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SubjectRe: [PATCH v4 1/7] fpga-mgr: wrap the write_init() op
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On 6/28/21 11:53 AM, Moritz Fischer wrote:
> On Fri, Jun 25, 2021 at 12:51:42PM -0700, trix@redhat.com wrote:
>> From: Tom Rix <trix@redhat.com>
>>
>> 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@redhat.com>
>> ---
>> drivers/fpga/fpga-mgr.c | 15 ++++++++++++---
>> 1 file changed, 12 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c
>> index ecb4c3c795fa5..c047de8a059b7 100644
>> --- a/drivers/fpga/fpga-mgr.c
>> +++ b/drivers/fpga/fpga-mgr.c
>> @@ -25,6 +25,15 @@ struct fpga_mgr_devres {
>> struct fpga_manager *mgr;
>> };
>>
>> +static inline int fpga_mgr_write_init(struct fpga_manager *mgr,
>> + struct fpga_image_info *info,
>> + const char *buf, size_t count)
>> +{
>> + if (mgr->mops->write_init)
> Will you need a if (mgr->mops && mgr->mops->write_init) here later?

This was changed from v3 based on Yilun's comment

https://lore.kernel.org/linux-fpga/20210624075414.GA44700@yilunxu-OptiPlex-7050/

This is checked on creation

>> + return mgr->mops->write_init(mgr, info, buf, count);
>> + return 0;
>> +}
>> +
>> /**
>> * fpga_image_info_alloc - Allocate an FPGA image info struct
>> * @dev: owning device
>> @@ -83,9 +92,9 @@ 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 +578,7 @@ 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
>>
> Looks good to me, I might reword the commit message some when applying.

That is fine.

Thanks

Tom


> - Moritz
>

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