struct net_device shouldn't be embedded into any structure, instead, the owner should use the private space to embed their state into net_device. But, in some cases the net_device is embedded inside the private structure, which blocks the usage of zero-length arrays inside net_device. Create a helper to allocate a dummy device at dynamically runtime, and move the Ethernet devices to use it, instead of embedding the dummy device inside the private structure. This fixes all the network cases plus some wireless drivers. PS: Due to lack of hardware, unfortunately most these patches are compiled tested only, except ath11k that was kindly tested by Kalle Valo. --- Changelog: v1: * https://lore.kernel.org/all/20240327200809.512867-1-leitao@xxxxxxxxxx/ v2: * Patch 1: Use a pre-defined name ("dummy#") for the dummy net_devices. * Patch 2-5: Added users for the new helper. v3: * Use free_netdev() instead of kfree() as suggested by Jakub. * Change the free_netdev() place in ipa driver, as suggested by Alex Elder. * Set err in the error path in the Marvell driver, as suggested by Simon Horman. v4: * Added a new patch to add dummy device at free_netdev(), as suggested by Jakub. * Added support for some wireless driver. * Added some Acked-by and Reviewed-by. Breno Leitao (9): net: free_netdev: exit earlier if dummy net: create a dummy net_device allocator net: marvell: prestera: allocate dummy net_device dynamically net: mediatek: mtk_eth_sock: allocate dummy net_device dynamically net: ipa: allocate dummy net_device dynamically net: ibm/emac: allocate dummy net_device dynamically wifi: qtnfmac: Use netdev dummy allocator helper wifi: ath10k: allocate dummy net_device dynamically wifi: ath11k: allocate dummy net_device dynamically drivers/net/ethernet/ibm/emac/mal.c | 14 ++++- drivers/net/ethernet/ibm/emac/mal.h | 2 +- .../ethernet/marvell/prestera/prestera_rxtx.c | 15 ++++- drivers/net/ethernet/mediatek/mtk_eth_soc.c | 17 ++++-- drivers/net/ethernet/mediatek/mtk_eth_soc.h | 2 +- drivers/net/ipa/gsi.c | 12 ++-- drivers/net/ipa/gsi.h | 2 +- drivers/net/wireless/ath/ath10k/core.c | 9 ++- drivers/net/wireless/ath/ath10k/core.h | 2 +- drivers/net/wireless/ath/ath10k/pci.c | 2 +- drivers/net/wireless/ath/ath10k/sdio.c | 2 +- drivers/net/wireless/ath/ath10k/snoc.c | 4 +- drivers/net/wireless/ath/ath10k/usb.c | 2 +- drivers/net/wireless/ath/ath11k/ahb.c | 9 ++- drivers/net/wireless/ath/ath11k/core.h | 2 +- drivers/net/wireless/ath/ath11k/pcic.c | 21 +++++-- .../wireless/quantenna/qtnfmac/pcie/pcie.c | 3 +- include/linux/netdevice.h | 3 + net/core/dev.c | 57 ++++++++++++------- 19 files changed, 127 insertions(+), 53 deletions(-) -- 2.43.0
