usb: gadget: g_dnl: Sync internal SN variable with env
Since commit 842778a0 ("usb: gadget: g_dnl: only set iSerialNumber if we have a serial#") "fastboot devices" stopped to show correct device serial number for TI boards, showing this line instead: ???????????? fastboot This is because serial# env variable could be set after g_dnl gadget was initialized (e.g. by using env_set() in the board file). To fix this, let's update internal serial number variable (g_dnl_serial) when "serial#" env var is changed. Signed-off-by: NSam Protsenko <semen.protsenko@linaro.org> Cc: Felipe Balbi <felipe.balbi@linux.intel.com> Tested-by: NHeiko Schocher <hs@denx.de> Acked-by: NŁukasz Majewski <lukma@denx.de> Reviewed-by: NMarek Vasut <marex@denx.de>
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