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| author | Matti Linnanvuori <mattilinnanvuori@yahoo.com> | 2008-01-15 06:25:27 -0800 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2008-01-18 14:41:49 -0500 |
| commit | ce3ba1399d2ba81b3699a82649df0cd8223c6662 (patch) | |
| tree | c247fcfc5c004c4e76242ead710bb36709954dc6 /Documentation/networking/driver.txt | |
| parent | be63a21c9573fbf88106ff0f030da5974551257b (diff) | |
| download | lwn-ce3ba1399d2ba81b3699a82649df0cd8223c6662.tar.gz lwn-ce3ba1399d2ba81b3699a82649df0cd8223c6662.zip | |
Documentation: add a guideline for hard_start_xmit method
Add a guideline not to modify SKBs.
Signed-off-by: Matti Linnanvuori <mattilinnanvuori@yahoo.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'Documentation/networking/driver.txt')
| -rw-r--r-- | Documentation/networking/driver.txt | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/Documentation/networking/driver.txt b/Documentation/networking/driver.txt index 4f7da5a2bf4f..ea72d2e66ca8 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. |