diff options
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/pcie/trans.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/pcie/trans.c | 38 |
1 files changed, 29 insertions, 9 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c index 8a074a516fb2..7bfddce582ad 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c @@ -1927,18 +1927,38 @@ static int iwl_trans_pcie_read_mem(struct iwl_trans *trans, u32 addr, void *buf, int dwords) { unsigned long flags; - int offs, ret = 0; + int offs = 0; u32 *vals = buf; - if (iwl_trans_grab_nic_access(trans, &flags)) { - iwl_write32(trans, HBUS_TARG_MEM_RADDR, addr); - for (offs = 0; offs < dwords; offs++) - vals[offs] = iwl_read32(trans, HBUS_TARG_MEM_RDAT); - iwl_trans_release_nic_access(trans, &flags); - } else { - ret = -EBUSY; + while (offs < dwords) { + /* limit the time we spin here under lock to 1/2s */ + unsigned long end = jiffies + HZ / 2; + bool resched = false; + + if (iwl_trans_grab_nic_access(trans, &flags)) { + iwl_write32(trans, HBUS_TARG_MEM_RADDR, + addr + 4 * offs); + + while (offs < dwords) { + vals[offs] = iwl_read32(trans, + HBUS_TARG_MEM_RDAT); + offs++; + + if (time_after(jiffies, end)) { + resched = true; + break; + } + } + iwl_trans_release_nic_access(trans, &flags); + + if (resched) + cond_resched(); + } else { + return -EBUSY; + } } - return ret; + + return 0; } static int iwl_trans_pcie_write_mem(struct iwl_trans *trans, u32 addr, |