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qlcnic: protect resoruce cleanup by rtnl lock

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o context resources can be in used, while resoruce cleanup is in progress,
  during fw recover.
o Null pointer execption can occur in send_cmd_desc, if fw recovery
  module frees tx ring without rtnl lock.
o Same applies to ethtool register dump and FW health registers should be dump
  in any case.

Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Amit Kumar Salecha 2010-02-01 05:24:57 +00:00 committed by David S. Miller
parent 1b95a83958
commit ce6684433f
2 changed files with 5 additions and 3 deletions
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6
drivers/net/qlcnic/qlcnic_ethtool.c
View File

@ -326,12 +326,12 @@ qlcnic_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *p)
regs->version = (1 << 24) | (adapter->ahw.revision_id << 16) | regs->version = (1 << 24) | (adapter->ahw.revision_id << 16) |
(adapter->pdev)->device; (adapter->pdev)->device;
if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
return;
for (i = 0; diag_registers[i] != -1; i++) for (i = 0; diag_registers[i] != -1; i++)
regs_buff[i] = QLCRD32(adapter, diag_registers[i]); regs_buff[i] = QLCRD32(adapter, diag_registers[i]);
if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
return;
regs_buff[i++] = 0xFFEFCDAB; /* Marker btw regs and ring count*/ regs_buff[i++] = 0xFFEFCDAB; /* Marker btw regs and ring count*/
regs_buff[i++] = 1; /* No. of tx ring */ regs_buff[i++] = 1; /* No. of tx ring */

2
drivers/net/qlcnic/qlcnic_main.c
View File

@ -2051,7 +2051,9 @@ qlcnic_detach_work(struct work_struct *work)
qlcnic_down(adapter, netdev); qlcnic_down(adapter, netdev);
rtnl_lock();
qlcnic_detach(adapter); qlcnic_detach(adapter);
rtnl_unlock();
status = QLCRD32(adapter, QLCNIC_PEG_HALT_STATUS1); status = QLCRD32(adapter, QLCNIC_PEG_HALT_STATUS1);