ath79: speed up ath9k-eeprom extraction

This is a simple copy of ipq40xx: speed up ath10k-caldata
extraction commit a69e101ed1169f562fc030a783cd997d3f066b16

Tested on DIR-825-B1

3768+0 records in
3768+0 records out
real	0m 11.90s
user	0m 0.03s
sys	0m 9.94s

1+0 records in
1+0 records out
real	0m 0.03s
user	0m 0.00s
sys	0m 0.03s

With this change eeprom extraction is fast enough to get
working Wi-Fi after initial install.

Signed-off-by: Dmitry Tunin <hanipouspilot@gmail.com>

diff --git a/target/linux/ath79/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom b/target/linux/ath79/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom
index 8b217d12c043978e8aedc630fd863e0184ac7202..84e4d07b35c8a823ec9853a7820355d81fe3a4f6 100644 (file)
--- a/target/linux/ath79/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom
+++ b/target/linux/ath79/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom
@@ -20,7 +20,7 @@ ath9k_eeprom_extract() {
        [ -n "$mtd" ] || \
                ath9k_eeprom_die "no mtd device found for partition $part"
 
-       dd if=$mtd of=/lib/firmware/$FIRMWARE bs=1 skip=$offset count=$count 2>/dev/null || \
+       dd if=$mtd of=/lib/firmware/$FIRMWARE iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null || \
                ath9k_eeprom_die "failed to extract from $mtd"
 }