6.6-stable review patch. If anyone has any objections, please let me know.
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From: Jiawen Wu jiawenwu@trustnetic.com
[ Upstream commit 8ce4f287524c74a118b0af1eebd4b24a8efca57a ]
The existing SW-FW interaction flow on the driver is wrong. Follow this wrong flow, driver would never return error if there is a unknown command. Since firmware writes back 'firmware ready' and 'unknown command' in the mailbox message if there is an unknown command sent by driver. So reading 'firmware ready' does not timeout. Then driver would mistakenly believe that the interaction has completed successfully.
It tends to happen with the use of custom firmware. Move the check for 'unknown command' out of the poll timeout for 'firmware ready'. And adjust the debug log so that mailbox messages are always printed when commands timeout.
Fixes: 1efa9bfe58c5 ("net: libwx: Implement interaction with firmware") Signed-off-by: Jiawen Wu jiawenwu@trustnetic.com Link: https://patch.msgid.link/20250103081013.1995939-1-jiawenwu@trustnetic.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/wangxun/libwx/wx_hw.c | 24 ++++++++++------------ 1 file changed, 11 insertions(+), 13 deletions(-)
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_hw.c b/drivers/net/ethernet/wangxun/libwx/wx_hw.c index 52130df26aee..d6bc2309d2a3 100644 --- a/drivers/net/ethernet/wangxun/libwx/wx_hw.c +++ b/drivers/net/ethernet/wangxun/libwx/wx_hw.c @@ -242,27 +242,25 @@ int wx_host_interface_command(struct wx *wx, u32 *buffer, status = read_poll_timeout(rd32, hicr, hicr & WX_MNG_MBOX_CTL_FWRDY, 1000, timeout * 1000, false, wx, WX_MNG_MBOX_CTL);
+ buf[0] = rd32(wx, WX_MNG_MBOX); + if ((buf[0] & 0xff0000) >> 16 == 0x80) { + wx_err(wx, "Unknown FW command: 0x%x\n", buffer[0] & 0xff); + status = -EINVAL; + goto rel_out; + } + /* Check command completion */ if (status) { - wx_dbg(wx, "Command has failed with no status valid.\n"); - - buf[0] = rd32(wx, WX_MNG_MBOX); - if ((buffer[0] & 0xff) != (~buf[0] >> 24)) { - status = -EINVAL; - goto rel_out; - } - if ((buf[0] & 0xff0000) >> 16 == 0x80) { - wx_dbg(wx, "It's unknown cmd.\n"); - status = -EINVAL; - goto rel_out; - } - + wx_err(wx, "Command has failed with no status valid.\n"); wx_dbg(wx, "write value:\n"); for (i = 0; i < dword_len; i++) wx_dbg(wx, "%x ", buffer[i]); wx_dbg(wx, "read value:\n"); for (i = 0; i < dword_len; i++) wx_dbg(wx, "%x ", buf[i]); + wx_dbg(wx, "\ncheck: %x %x\n", buffer[0] & 0xff, ~buf[0] >> 24); + + goto rel_out; }
if (!return_data)