diff options
| author |   Emmanuel Grumbach <emmanuel.grumbach@intel.com> | 2010-06-29 11:29:49 -0700 |
|---|---|---|
| committer |   Wey-Yi Guy <wey-yi.w.guy@intel.com> | 2010-07-09 10:17:24 -0700 |
| commit | 9726f347f82b0ce802530deb00ee2dde369e1d2f (patch) | |
| tree | c34f85766da18b444c08465b8c0bc96c6e2c8e68 /drivers/net | |
| parent | iwlagn: more generic description for iwlagn devices (diff) | |
| download | linux-dev-9726f347f82b0ce802530deb00ee2dde369e1d2f.tar.xz linux-dev-9726f347f82b0ce802530deb00ee2dde369e1d2f.zip | |
iwlagn: fix the bit mask of a FH register in stop Tx DMA flow
When we stop the Tx DMA channels, we poll bits 16:31 in
FH_TSSR_RX_STATUS_REG. From 4965 and up, only the bits 16:26 are legal.
Bits 27:31 are not used and are always unset.
Polling them will lead to fail on timeout but since the timeout is quite
small, the stall was not felt.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-agn-tx.c | 7 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-fh.h | 7 |
2 files changed, 6 insertions, 8 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-tx.c b/drivers/net/wireless/iwlwifi/iwl-agn-tx.c index 2573234e4db1..55a1b31fd09a 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn-tx.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn-tx.c @@ -950,9 +950,12 @@ void iwlagn_txq_ctx_stop(struct iwl_priv *priv) /* Stop each Tx DMA channel, and wait for it to be idle */ for (ch = 0; ch < priv->hw_params.dma_chnl_num; ch++) { iwl_write_direct32(priv, FH_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0); - iwl_poll_direct_bit(priv, FH_TSSR_TX_STATUS_REG, + if (iwl_poll_direct_bit(priv, FH_TSSR_TX_STATUS_REG, FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch), - 1000); + 1000)) + IWL_ERR(priv, "Failing on timeout while stopping" + " DMA channel %d [0x%08x]", ch, + iwl_read_direct32(priv, FH_TSSR_TX_STATUS_REG)); } spin_unlock_irqrestore(&priv->lock, flags); } diff --git a/drivers/net/wireless/iwlwifi/iwl-fh.h b/drivers/net/wireless/iwlwifi/iwl-fh.h index 113c3669b9ce..dd896f28c931 100644 --- a/drivers/net/wireless/iwlwifi/iwl-fh.h +++ b/drivers/net/wireless/iwlwifi/iwl-fh.h @@ -398,12 +398,7 @@ */ #define FH_TSSR_TX_ERROR_REG (FH_TSSR_LOWER_BOUND + 0x018) -#define FH_TSSR_TX_STATUS_REG_BIT_BUFS_EMPTY(_chnl) ((1 << (_chnl)) << 24) -#define FH_TSSR_TX_STATUS_REG_BIT_NO_PEND_REQ(_chnl) ((1 << (_chnl)) << 16) - -#define FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(_chnl) \ - (FH_TSSR_TX_STATUS_REG_BIT_BUFS_EMPTY(_chnl) | \ - FH_TSSR_TX_STATUS_REG_BIT_NO_PEND_REQ(_chnl)) +#define FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(_chnl) ((1 << (_chnl)) << 16) /* Tx service channels */ #define FH_SRVC_CHNL (9) |