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>
mariux64 · Jul 28, 2008 · a013869 · a013869
1 parent 0f38c47
commit a013869
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Showing 3 changed files with 8 additions and 1 deletion.
diff --git 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);

diff --git a/drivers/char/pcmcia/ipwireless/network.c b/drivers/char/pcmcia/ipwireless/network.c
@@ -499,3 +499,8 @@ int ipwireless_ppp_unit_number(struct ipw_network *network)
 
 	return ret;
 }
+
+int ipwireless_ppp_mru(const struct ipw_network *network)
+{
+	return network->mru;
+}
diff --git a/drivers/char/pcmcia/ipwireless/network.h b/drivers/char/pcmcia/ipwireless/network.h
@@ -48,5 +48,6 @@ void ipwireless_ppp_open(struct ipw_network *net);
 void ipwireless_ppp_close(struct ipw_network *net);
 int ipwireless_ppp_channel_index(struct ipw_network *net);
 int ipwireless_ppp_unit_number(struct ipw_network *net);
+int ipwireless_ppp_mru(const struct ipw_network *net);
 
 #endif