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Commit ce3ba139 authored by Matti Linnanvuori's avatar Matti Linnanvuori Committed by Jeff Garzik
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Documentation: add a guideline for hard_start_xmit method 



Add a guideline not to modify SKBs.

Signed-off-by: default avatarMatti Linnanvuori <mattilinnanvuori@yahoo.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent be63a21c

Documentation/networking/driver.txt

+4 −1
Original line number Diff line number Diff line
@@ -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.