From ce3ba1399d2ba81b3699a82649df0cd8223c6662 Mon Sep 17 00:00:00 2001 From: Matti Linnanvuori Date: Tue, 15 Jan 2008 06:25:27 -0800 Subject: Documentation: add a guideline for hard_start_xmit method Add a guideline not to modify SKBs. Signed-off-by: Matti Linnanvuori Signed-off-by: Jeff Garzik --- Documentation/networking/driver.txt | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/Documentation/networking/driver.txt b/Documentation/networking/driver.txt index 4f7da5a2bf4..ea72d2e66ca 100644 --- a/Documentation/networking/driver.txt +++ b/Documentation/networking/driver.txt @@ -61,7 +61,10 @@ Transmit path guidelines: 2) Do not forget to update netdev->trans_start to jiffies after each new tx packet is given to the hardware. -3) Do not forget that once you return 0 from your hard_start_xmit +3) A hard_start_xmit method must not modify the shared parts of a + cloned SKB. + +4) Do not forget that once you return 0 from your hard_start_xmit method, it is your driver's responsibility to free up the SKB and in some finite amount of time. -- cgit v1.2.3-70-g09d2