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fpga: fpga-region: comment on fpga_region_program_fpga locking

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Add a comment to the header of fpga_region_program_fpga()
regarding locking of the bridges.

Signed-off-by: Alan Tull <[email protected]>
Signed-off-by: Moritz Fischer <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Alan Tull 2018-04-16 20:43:37 -07:00 • committed by Greg Kroah-Hartman
commit 093a89d4c2
1 changed files with 5 additions and 0 deletions
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5
drivers/fpga/fpga-region.c
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@ -95,6 +95,11 @@ static void fpga_region_put(struct fpga_region *region)
* fpga_region_program_fpga - program FPGA
* @region: FPGA region
* Program an FPGA using fpga image info (region->info).
* If the region has a get_bridges function, the exclusive reference for the
* bridges will be held if programming succeeds. This is intended to prevent
* reprogramming the region until the caller considers it safe to do so.
* The caller will need to call fpga_bridges_put() before attempting to
* reprogram the region.
* Return 0 for success or negative error code.
*/
int fpga_region_program_fpga(struct fpga_region *region)