net: bcmgenet: fix off-by-one in incrementing read pointer

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Commit b629be5c83 ("net: bcmgenet: check
harder for out of memory conditions") moved the increment of the local
read pointer *before* reading from the hardware descriptor using
dmadesc_get_length_status(), which creates an off-by-one situation.

Fix this by moving again the read_ptr increment after we have read the
hardware descriptor to get both the control block and the read pointer
back in sync.

Fixes: b629be5c83 ("net: bcmgenet: check harder for out of memory conditions")
Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Petri Gynther <pgynther@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

Florian Fainelli 2014-10-10 10:51:52 -07:00 • committed by David S. Miller

parent 35b7a1915a

commit cf377d886f

1 changed files with 4 additions and 5 deletions

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drivers/net/ethernet/broadcom/genet/bcmgenet.c

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