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-rw-r--r--target/linux/ar71xx/base-files/etc/hotplug.d/firmware/11-ath10k-caldata8
1 files changed, 7 insertions, 1 deletions
diff --git a/target/linux/ar71xx/base-files/etc/hotplug.d/firmware/11-ath10k-caldata b/target/linux/ar71xx/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
index a3d4867b0b..e6ea873e40 100644
--- a/target/linux/ar71xx/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
+++ b/target/linux/ar71xx/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
@@ -18,12 +18,18 @@ ath10kcal_extract() {
local part=$1
local offset=$2
local count=$3
- local mtd
+ local mtd cal_size
mtd=$(find_mtd_chardev $part)
[ -n "$mtd" ] || \
ath10kcal_die "no mtd device found for partition $part"
+ # Check that the calibration data size in header equals the desired size
+ cal_size=$(dd if=$mtd bs=2 count=1 skip=$(( $offset / 2 )) conv=swab 2>/dev/null | hexdump -ve '1/2 "%d"')
+
+ [ "$count" = "$cal_size" ] || \
+ ath10kcal_die "no calibration data found in $part"
+
dd if=$mtd of=/lib/firmware/$FIRMWARE bs=1 skip=$offset count=$count 2>/dev/null || \
ath10kcal_die "failed to extract calibration data from $mtd"
}