diff options
| author | Emmanuel Grumbach <emmanuel.grumbach@intel.com> | 2012-12-31 13:46:42 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2013-01-03 15:34:11 +0100 |
| commit | abae2386d55aff1d395cdb665f03684c227a6a69 (patch) | |
| tree | dfa4d78c306f6a17d7c6b170531b760c17055af4 /drivers/net/wireless/iwlwifi/iwl-test.c | |
| parent | c8f9b0feab564e1ecf460b440e838673aced282c (diff) | |
| download | blackbird-op-linux-abae2386d55aff1d395cdb665f03684c227a6a69.tar.gz blackbird-op-linux-abae2386d55aff1d395cdb665f03684c227a6a69.zip | |
iwlwifi: always check that grab_nic_access succeeds
This allows to let sparse check that the NIC access is
always released.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-test.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-test.c | 44 |
1 files changed, 25 insertions, 19 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-test.c b/drivers/net/wireless/iwlwifi/iwl-test.c index f8d8df8f96c3..1a226114fe73 100644 --- a/drivers/net/wireless/iwlwifi/iwl-test.c +++ b/drivers/net/wireless/iwlwifi/iwl-test.c @@ -467,7 +467,10 @@ static int iwl_test_indirect_read(struct iwl_test *tst, u32 addr, u32 size) if (IWL_ABS_PRPH_START <= addr && addr < IWL_ABS_PRPH_START + PRPH_END) { spin_lock_irqsave(&trans->reg_lock, flags); - iwl_trans_grab_nic_access(trans, false); + if (!iwl_trans_grab_nic_access(trans, false)) { + spin_unlock_irqrestore(&trans->reg_lock, flags); + return -EIO; + } iwl_write32(trans, HBUS_TARG_PRPH_RADDR, addr | (3 << 24)); for (i = 0; i < size; i += 4) @@ -500,26 +503,29 @@ static int iwl_test_indirect_write(struct iwl_test *tst, u32 addr, if (IWL_ABS_PRPH_START <= addr && addr < IWL_ABS_PRPH_START + PRPH_END) { - /* Periphery writes can be 1-3 bytes long, or DWORDs */ - if (size < 4) { - memcpy(&val, buf, size); - spin_lock_irqsave(&trans->reg_lock, flags); - iwl_trans_grab_nic_access(trans, false); - iwl_write32(trans, HBUS_TARG_PRPH_WADDR, - (addr & 0x0000FFFF) | - ((size - 1) << 24)); - iwl_write32(trans, HBUS_TARG_PRPH_WDAT, val); - iwl_trans_release_nic_access(trans); - /* needed after consecutive writes w/o read */ - mmiowb(); + /* Periphery writes can be 1-3 bytes long, or DWORDs */ + if (size < 4) { + memcpy(&val, buf, size); + spin_lock_irqsave(&trans->reg_lock, flags); + if (!iwl_trans_grab_nic_access(trans, false)) { spin_unlock_irqrestore(&trans->reg_lock, flags); - } else { - if (size % 4) - return -EINVAL; - for (i = 0; i < size; i += 4) - iwl_write_prph(trans, addr+i, - *(u32 *)(buf+i)); + return -EIO; } + iwl_write32(trans, HBUS_TARG_PRPH_WADDR, + (addr & 0x0000FFFF) | + ((size - 1) << 24)); + iwl_write32(trans, HBUS_TARG_PRPH_WDAT, val); + iwl_trans_release_nic_access(trans); + /* needed after consecutive writes w/o read */ + mmiowb(); + spin_unlock_irqrestore(&trans->reg_lock, flags); + } else { + if (size % 4) + return -EINVAL; + for (i = 0; i < size; i += 4) + iwl_write_prph(trans, addr+i, + *(u32 *)(buf+i)); + } } else if (iwl_test_valid_hw_addr(tst, addr)) { iwl_trans_write_mem(trans, addr, buf, size / 4); } else { |
