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authorMatti Linnanvuori <mattilinnanvuori@yahoo.com>2008-01-15 09:25:27 -0500
committerJeff Garzik <jeff@garzik.org>2008-01-18 14:41:49 -0500
commitce3ba1399d2ba81b3699a82649df0cd8223c6662 (patch)
treec247fcfc5c004c4e76242ead710bb36709954dc6
parentbe63a21c9573fbf88106ff0f030da5974551257b (diff)
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>
-rw-r--r--Documentation/networking/driver.txt5
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:
612) Do not forget to update netdev->trans_start to jiffies after 612) Do not forget to update netdev->trans_start to jiffies after
62 each new tx packet is given to the hardware. 62 each new tx packet is given to the hardware.
63 63
643) Do not forget that once you return 0 from your hard_start_xmit 643) A hard_start_xmit method must not modify the shared parts of a
65 cloned SKB.
66
674) Do not forget that once you return 0 from your hard_start_xmit
65 method, it is your driver's responsibility to free up the SKB 68 method, it is your driver's responsibility to free up the SKB
66 and in some finite amount of time. 69 and in some finite amount of time.
67 70