From 04ac61d3b88fb4b168b889a3228c29a5bff3fac7 Mon Sep 17 00:00:00 2001 From: Sarveshwar Bandi Date: Tue, 25 May 2010 16:16:32 -0700 Subject: [PATCH] be2net: Bug fix to avoid disabling bottom half during firmware upgrade. Certain firmware commands/operations to upgrade firmware could take several seconds to complete. The code presently disables bottom half during these operations which could lead to unpredictable behaviour in certain cases. This patch now does all firmware upgrade operations asynchronously using a completion variable. Signed-off-by: Sarveshwar Bandi Signed-off-by: David S. Miller --- drivers/net/benet/be.h | 2 ++ drivers/net/benet/be_cmds.c | 19 +++++++++++++++++-- drivers/net/benet/be_main.c | 1 + 3 files changed, 20 insertions(+), 2 deletions(-) diff --git a/drivers/net/benet/be.h b/drivers/net/benet/be.h index 373c1a563474d..b46be490cd2aa 100644 --- a/drivers/net/benet/be.h +++ b/drivers/net/benet/be.h @@ -283,6 +283,8 @@ struct be_adapter { u8 port_type; u8 transceiver; u8 generation; /* BladeEngine ASIC generation */ + u32 flash_status; + struct completion flash_compl; bool sriov_enabled; u32 vf_if_handle[BE_MAX_VF]; diff --git a/drivers/net/benet/be_cmds.c b/drivers/net/benet/be_cmds.c index e79bf8b9af3bc..c911bfb55b195 100644 --- a/drivers/net/benet/be_cmds.c +++ b/drivers/net/benet/be_cmds.c @@ -59,6 +59,13 @@ static int be_mcc_compl_process(struct be_adapter *adapter, compl_status = (compl->status >> CQE_STATUS_COMPL_SHIFT) & CQE_STATUS_COMPL_MASK; + + if ((compl->tag0 == OPCODE_COMMON_WRITE_FLASHROM) && + (compl->tag1 == CMD_SUBSYSTEM_COMMON)) { + adapter->flash_status = compl_status; + complete(&adapter->flash_compl); + } + if (compl_status == MCC_STATUS_SUCCESS) { if (compl->tag0 == OPCODE_ETH_GET_STATISTICS) { struct be_cmd_resp_get_stats *resp = @@ -1417,6 +1424,7 @@ int be_cmd_write_flashrom(struct be_adapter *adapter, struct be_dma_mem *cmd, int status; spin_lock_bh(&adapter->mcc_lock); + adapter->flash_status = 0; wrb = wrb_from_mccq(adapter); if (!wrb) { @@ -1428,6 +1436,7 @@ int be_cmd_write_flashrom(struct be_adapter *adapter, struct be_dma_mem *cmd, be_wrb_hdr_prepare(wrb, cmd->size, false, 1, OPCODE_COMMON_WRITE_FLASHROM); + wrb->tag1 = CMD_SUBSYSTEM_COMMON; be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_COMMON, OPCODE_COMMON_WRITE_FLASHROM, cmd->size); @@ -1439,10 +1448,16 @@ int be_cmd_write_flashrom(struct be_adapter *adapter, struct be_dma_mem *cmd, req->params.op_code = cpu_to_le32(flash_opcode); req->params.data_buf_size = cpu_to_le32(buf_size); - status = be_mcc_notify_wait(adapter); + be_mcc_notify(adapter); + spin_unlock_bh(&adapter->mcc_lock); + + if (!wait_for_completion_timeout(&adapter->flash_compl, + msecs_to_jiffies(12000))) + status = -1; + else + status = adapter->flash_status; err: - spin_unlock_bh(&adapter->mcc_lock); return status; } diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c index 1c79c2009e40c..aa065c71ddd86 100644 --- a/drivers/net/benet/be_main.c +++ b/drivers/net/benet/be_main.c @@ -2319,6 +2319,7 @@ static int be_ctrl_init(struct be_adapter *adapter) spin_lock_init(&adapter->mcc_lock); spin_lock_init(&adapter->mcc_cq_lock); + init_completion(&adapter->flash_compl); pci_save_state(adapter->pdev); return 0; -- 2.39.5