Re:Re: [net] Revert "net: wwan: mhi_wwan_mbim: Avoid -Wflex-array-member-not-at-end warning"

["Slark Xiao" <slark_xiao@163.com>]

At 2026-01-20 15:51:57, "Gustavo A. R. Silva" <gustavo@embeddedor.com> wrote:
>Hi Slark,
>
>On 1/20/26 16:20, Slark Xiao wrote:
>> This reverts commit eeecf5d3a3a484cedfa3f2f87e6d51a7390ed960.
>> 
>> This change lead to MHI WWAN device can't connect to internet.
>> I found a netwrok issue with kernel 6.19-rc4, but network works
>> well with kernel 6.18-rc1. After checking, this commit is the
>> root cause.
>
>Thanks for the report.
>
>Could you please apply the following patch on top of this revert,
>and let us know if the problem still manifests? Thank you!
>
>diff --git a/drivers/net/wwan/mhi_wwan_mbim.c b/drivers/net/wwan/mhi_wwan_mbim.c
>index 1d7e3ad900c1..a271a72fed63 100644
>--- a/drivers/net/wwan/mhi_wwan_mbim.c
>+++ b/drivers/net/wwan/mhi_wwan_mbim.c
>@@ -78,9 +78,12 @@ struct mhi_mbim_context {
>
>  struct mbim_tx_hdr {
>         struct usb_cdc_ncm_nth16 nth16;
>-       struct usb_cdc_ncm_ndp16 ndp16;
>-       struct usb_cdc_ncm_dpe16 dpe16[2];
>+       __TRAILING_OVERLAP(struct usb_cdc_ncm_ndp16, ndp16, dpe16, __packed,
>+               struct usb_cdc_ncm_dpe16 dpe16[2];
>+       );
>  } __packed;
>+static_assert(offsetof(struct mbim_tx_hdr, ndp16.dpe16) ==
>+             offsetof(struct mbim_tx_hdr, dpe16));
>
>  static struct mhi_mbim_link *mhi_mbim_get_link_rcu(struct mhi_mbim_context *mbim,
>                                                    unsigned int session)
This patch won't introduce previous problem.