ipwireless: Preallocate received packet buffers with MRU size

ipwireless: Preallocate received packet buffers with MRU size

Packets are assembled from link size (~300 bytes) up to PPP MRU
(1500 by default). Try to preallocate full size rather than
repeatedly advance buffer size by 256 bytes.

Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/char/pcmcia/ipwireless/hardware.c b/drivers/char/pcmcia/ipwireless/hardware.c
index d1e69de19156..7d500f82195a 100644
--- a/drivers/char/pcmcia/ipwireless/hardware.c
+++ b/drivers/char/pcmcia/ipwireless/hardware.c
@@ -567,7 +567,8 @@ static struct ipw_rx_packet *pool_allocate(struct ipw_hardware *hw,
                         spin_unlock_irqrestore(&hw->lock, flags);
                         list_del(&packet->queue);
                 } else {
-                        static int min_capacity = 256;
+                        const int min_capacity =
+                                ipwireless_ppp_mru(hw->network + 2);
                         int new_capacity;
 
                         spin_unlock_irqrestore(&hw->lock, flags);