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s390/qeth: simplify fragment type selection

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Improve readability of the code that determines a buffer element's
fragment type, and reduce the number of cases down from 5 to 3.

Signed-off-by: Julian Wiedmann <[email protected]>
Acked-by: Ursula Braun <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Julian Wiedmann 2017-08-15 17:02:42 +02:00 • committed by David S. Miller
commit 5258830bf6
1 changed files with 8 additions and 15 deletions
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23
drivers/s390/net/qeth_core_main.c
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@ -3918,23 +3918,16 @@ static inline void __qeth_fill_buffer(struct sk_buff *skb,
buffer->element[element].addr = data;
buffer->element[element].length = length_here;
length -= length_here;
if (!length) {
if (first_lap)
if (skb_shinfo(skb)->nr_frags)
buffer->element[element].eflags =
SBAL_EFLAGS_FIRST_FRAG;
else
buffer->element[element].eflags = 0;
else
if (first_lap) {
if (length || skb_is_nonlinear(skb))
/* skb needs additional elements */
buffer->element[element].eflags =
SBAL_EFLAGS_MIDDLE_FRAG;
SBAL_EFLAGS_FIRST_FRAG;
else
buffer->element[element].eflags = 0;
} else {
if (first_lap)
buffer->element[element].eflags =
SBAL_EFLAGS_FIRST_FRAG;
else
buffer->element[element].eflags =
SBAL_EFLAGS_MIDDLE_FRAG;
buffer->element[element].eflags =
SBAL_EFLAGS_MIDDLE_FRAG;
}
data += length_here;
element++;