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RDMA/nes: Fix adapter reset after PXE boot
After PXE boot, the iw_nes driver does a full reset to ensure the card is in a clean state. However, it doesn't wait for firmware to complete its work before issuing a port reset to enable the ports, which leads to problems bringing up the ports. The solution is to wait for firmware to complete its work before proceeding with port reset. This bug was flagged by Roland Dreier <rolandd@cisco.com>. Cc: <stable@kernel.org> Signed-off-by: Chien Tung <ctung@neteffect.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
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@ -1849,8 +1849,10 @@ static int mini_cm_recv_pkt(struct nes_cm_core *cm_core, struct nes_vnic *nesvni
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nfo.rem_addr = ntohl(iph->saddr);
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nfo.rem_port = ntohs(tcph->source);
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nes_debug(NES_DBG_CM, "Received packet: dest=0x%08X:0x%04X src=0x%08X:0x%04X\n",
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iph->daddr, tcph->dest, iph->saddr, tcph->source);
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nes_debug(NES_DBG_CM, "Received packet: dest=" NIPQUAD_FMT
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":0x%04X src=" NIPQUAD_FMT ":0x%04X\n",
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NIPQUAD(iph->daddr), tcph->dest,
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NIPQUAD(iph->saddr), tcph->source);
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/* note: this call is going to increment cm_node ref count */
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cm_node = find_node(cm_core,
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@ -636,6 +636,15 @@ static unsigned int nes_reset_adapter_ne020(struct nes_device *nesdev, u8 *OneG_
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nes_debug(NES_DBG_INIT, "Did not see full soft reset done.\n");
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return 0;
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}
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i = 0;
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while ((nes_read_indexed(nesdev, NES_IDX_INT_CPU_STATUS) != 0x80) && i++ < 10000)
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mdelay(1);
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if (i >= 10000) {
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printk(KERN_ERR PFX "Internal CPU not ready, status = %02X\n",
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nes_read_indexed(nesdev, NES_IDX_INT_CPU_STATUS));
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return 0;
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}
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}
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/* port reset */
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@ -684,17 +693,6 @@ static unsigned int nes_reset_adapter_ne020(struct nes_device *nesdev, u8 *OneG_
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}
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}
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i = 0;
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while ((nes_read_indexed(nesdev, NES_IDX_INT_CPU_STATUS) != 0x80) && i++ < 10000)
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mdelay(1);
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if (i >= 10000) {
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printk(KERN_ERR PFX "Internal CPU not ready, status = %02X\n",
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nes_read_indexed(nesdev, NES_IDX_INT_CPU_STATUS));
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return 0;
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}
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return port_count;
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}
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