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| author | Alan Tull <atull@kernel.org> | 2018-04-16 20:43:37 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-23 13:33:01 +0200 |
| commit | 093a89d4c21701e61025386a08a2d1ec5d97c805 (patch) | |
| tree | 8946b7d0eaacfee634419c7129cd3f7487fe7202 /drivers/fpga/fpga-region.c | |
| parent | 88fb3a0023307356a05f6b8e61a0ccddc6d32b2c (diff) | |
| download | linux-093a89d4c21701e61025386a08a2d1ec5d97c805.tar.bz2 | |
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 <atull@kernel.org>
Signed-off-by: Moritz Fischer <mdf@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/fpga/fpga-region.c')
| -rw-r--r-- | drivers/fpga/fpga-region.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/fpga/fpga-region.c b/drivers/fpga/fpga-region.c index edab2a2e03ef..cb0603e07ff8 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) |