ixbge: fix bug when using large pages and jumbo frames

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it was pointed out on the list that ixgbe was failing when using 64kB pages
and large 16kB MTU.

since with a 64kB PAGE_SIZE MAX_SKB_FRAGS = 3, the way the driver was
configuring page usage was assuming 2kB is half a page, and was only
ever dmaing that much data to a half page.

(16kB - header size) / 2048 = 7 or 8 pages, which would far exceed 3

adjust the driver to account for these large pages, the hardware can
support DMA to up to 16kB for each descriptor.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

Jesse Brandeburg 2009-02-24 16:37:31 -08:00 • committed by David S. Miller

parent c7e4358ae8

commit 32344a3940

2 changed files with 9 additions and 1 deletions

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1

drivers/net/ixgbe/ixgbe.h

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9

drivers/net/ixgbe/ixgbe_main.c

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