From: Alan Tull Date: Tue, 17 Apr 2018 03:43:37 +0000 (-0700) Subject: fpga: fpga-region: comment on fpga_region_program_fpga locking X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=093a89d4c21701e61025386a08a2d1ec5d97c805;p=linux.git fpga: fpga-region: comment on fpga_region_program_fpga locking Add a comment to the header of fpga_region_program_fpga() regarding locking of the bridges. Signed-off-by: Alan Tull Signed-off-by: Moritz Fischer Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/fpga/fpga-region.c b/drivers/fpga/fpga-region.c index edab2a2e03ef8..cb0603e07ff86 100644 --- a/drivers/fpga/fpga-region.c +++ b/drivers/fpga/fpga-region.c @@ -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)