From: Jakub Kicinski Date: Wed, 17 Jul 2024 16:15:59 +0000 (-0700) Subject: eth: fbnic: don't build the driver when skb has more than 21 frags X-Git-Tag: v6.11-rc1~104^2 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=4359836129d931fc424370249a1fcdec139fe407;p=thirdparty%2Fkernel%2Flinux.git eth: fbnic: don't build the driver when skb has more than 21 frags Similarly to commit 0e03c643dc93 ("eth: fbnic: fix s390 build."), the driver won't build if skb_shared_info has more than 25 frags assuming a 64B cache line and 21 frags assuming a 128B cache line. (512 - 48 - 64) / 16 = 25 (512 - 48 - 128) / 16 = 21 Fixes: 0cb4c0a13723 ("eth: fbnic: Implement Rx queue alloc/start/stop/free") Signed-off-by: Jakub Kicinski Link: https://patch.msgid.link/20240717161600.1291544-1-kuba@kernel.org Signed-off-by: Paolo Abeni --- diff --git a/drivers/net/ethernet/meta/Kconfig b/drivers/net/ethernet/meta/Kconfig index a9f078212c783..86034ea4ba5b6 100644 --- a/drivers/net/ethernet/meta/Kconfig +++ b/drivers/net/ethernet/meta/Kconfig @@ -21,6 +21,7 @@ config FBNIC tristate "Meta Platforms Host Network Interface" depends on X86_64 || COMPILE_TEST depends on S390=n + depends on MAX_SKB_FRAGS < 22 depends on PCI_MSI select PHYLINK help