From 1743df83ae5a949037eb86a12f225abd4374d176 Mon Sep 17 00:00:00 2001 From: Alan Tull Date: Wed, 15 Nov 2017 14:20:17 -0600 Subject: [PATCH] fpga: region: check for child regions before allocing image info During a device tree overlay pre-apply notification, the check for child FPGA regions can happen slightly earlier. This saves us from allocating the FPGA image info that just gets thrown away. This is a baby step in refactoring the FPGA region code to separate out common FPGA region code from FPGA region Device Tree overlay support. Signed-off-by: Alan Tull Acked-by: Moritz Fischer Signed-off-by: Greg Kroah-Hartman --- drivers/fpga/fpga-region.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/drivers/fpga/fpga-region.c b/drivers/fpga/fpga-region.c index d78f444c1350..afac5433978b 100644 --- a/drivers/fpga/fpga-region.c +++ b/drivers/fpga/fpga-region.c @@ -355,15 +355,19 @@ static int fpga_region_notify_pre_apply(struct fpga_region *region, const char *firmware_name; int ret; - info = fpga_image_info_alloc(dev); - if (!info) - return -ENOMEM; - - /* Reject overlay if child FPGA Regions have firmware-name property */ + /* + * Reject overlay if child FPGA Regions added in the overlay have + * firmware-name property (would mean that an FPGA region that has + * not been added to the live tree yet is doing FPGA programming). + */ ret = child_regions_with_firmware(nd->overlay); if (ret) return ret; + info = fpga_image_info_alloc(dev); + if (!info) + return -ENOMEM; + /* Read FPGA region properties from the overlay */ if (of_property_read_bool(nd->overlay, "partial-fpga-config")) info->flags |= FPGA_MGR_PARTIAL_RECONFIG;