From: Zach Brown Date: Tue, 18 May 2010 22:44:50 +0000 (-0700) Subject: RDS/IB: get the xmit max_sge from the RDS IB device on the connection X-Git-Tag: v2.6.37-rc1~147^2~499^2~39 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=89bf9d4158b5a1b6bd00960eb2e47601ec8cc138;p=pandora-kernel.git RDS/IB: get the xmit max_sge from the RDS IB device on the connection rds_ib_xmit_rdma() was calling ib_get_client_data() to get at the rds_ibdevice just to get the max_sge for the transmit. This patch instead has it get it directly off the rds_ibdev which is stored on the connection. The current code won't free the rds_ibdev until all the IB connections that use it are freed. So it's safe to reference the rds_ibdev this way. In the future it also makes it easier to support proper reference counting of the rds_ibdev struct. As an additional bonus, this gets rid of the performance hit of calling in to the IB stack to look up the rds_ibdev. The current implementation in the IB stack acquires an interrupt blocking spinlock to protect the registration of client callback data. Signed-off-by: Zach Brown --- Reading git-diff-tree failed