From e672a47fd99b47589dfe2f85759e4c8de526196b Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sun, 8 Jul 2012 15:58:43 -0400 Subject: [PATCH] srpt: use target_execute_cmd for WRITEs in srpt_handle_rdma_comp srpt_handle_rdma_comp is called from kthread context and thus can execute target_execute_cmd directly. srpt_abort_cmd sets the CMD_T_LUN_STOP flag directly, and thus the abuse of transport_generic_handle_data can be replaced with an opencoded variant of that code path. I'm still not happy about a fabric driver poking into target core internals like this, but let's defer the bigger architecture changes for now. Signed-off-by: Christoph Hellwig Signed-off-by: Nicholas Bellinger --- drivers/infiniband/ulp/srpt/ib_srpt.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.c b/drivers/infiniband/ulp/srpt/ib_srpt.c index 5f6b7f63cdef..7a0ce8d42887 100644 --- a/drivers/infiniband/ulp/srpt/ib_srpt.c +++ b/drivers/infiniband/ulp/srpt/ib_srpt.c @@ -1377,10 +1377,14 @@ static int srpt_abort_cmd(struct srpt_send_ioctx *ioctx) break; case SRPT_STATE_NEED_DATA: /* DMA_TO_DEVICE (write) - RDMA read error. */ + + /* XXX(hch): this is a horrible layering violation.. */ spin_lock_irqsave(&ioctx->cmd.t_state_lock, flags); ioctx->cmd.transport_state |= CMD_T_LUN_STOP; + ioctx->cmd.transport_state &= ~CMD_T_ACTIVE; spin_unlock_irqrestore(&ioctx->cmd.t_state_lock, flags); - transport_generic_handle_data(&ioctx->cmd); + + complete(&ioctx->cmd.transport_lun_stop_comp); break; case SRPT_STATE_CMD_RSP_SENT: /* @@ -1463,9 +1467,10 @@ static void srpt_handle_send_comp(struct srpt_rdma_ch *ch, /** * srpt_handle_rdma_comp() - Process an IB RDMA completion notification. * - * Note: transport_generic_handle_data() is asynchronous so unmapping the - * data that has been transferred via IB RDMA must be postponed until the - * check_stop_free() callback. + * XXX: what is now target_execute_cmd used to be asynchronous, and unmapping + * the data that has been transferred via IB RDMA had to be postponed until the + * check_stop_free() callback. None of this is nessecary anymore and needs to + * be cleaned up. */ static void srpt_handle_rdma_comp(struct srpt_rdma_ch *ch, struct srpt_send_ioctx *ioctx, @@ -1477,7 +1482,7 @@ static void srpt_handle_rdma_comp(struct srpt_rdma_ch *ch, if (opcode == SRPT_RDMA_READ_LAST) { if (srpt_test_and_set_cmd_state(ioctx, SRPT_STATE_NEED_DATA, SRPT_STATE_DATA_IN)) - transport_generic_handle_data(&ioctx->cmd); + target_execute_cmd(&ioctx->cmd); else printk(KERN_ERR "%s[%d]: wrong state = %d\n", __func__, __LINE__, srpt_get_cmd_state(ioctx)); -- 2.39.5