diff options
| author | Nick Kossifidis <mickflemm@gmail.com> | 2010-11-23 20:52:24 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2010-11-30 13:52:32 -0500 |
| commit | e8325ed87457e07b9ceeb1e7a31df787dd7ee106 (patch) | |
| tree | f41b8ea9c3a12fa8fe3ed881fba74e06890b6d39 /drivers | |
| parent | f7317ba2d669c1b54fb31ed7834361a700a79217 (diff) | |
| download | lwn-e8325ed87457e07b9ceeb1e7a31df787dd7ee106.tar.gz lwn-e8325ed87457e07b9ceeb1e7a31df787dd7ee106.zip | |
ath5k: Check RXE when setting RXDP
* Make sure we are not trying to set RXDP while RX is active,
for now ignore the return value.
Signed-off-by: Nick Kossifidis <mickflemm@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/ath/ath5k/ath5k.h | 2 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/ath5k/dma.c | 11 |
2 files changed, 10 insertions, 3 deletions
diff --git a/drivers/net/wireless/ath/ath5k/ath5k.h b/drivers/net/wireless/ath/ath5k/ath5k.h index 629a5eebe302..b36d3a530258 100644 --- a/drivers/net/wireless/ath/ath5k/ath5k.h +++ b/drivers/net/wireless/ath/ath5k/ath5k.h @@ -1168,7 +1168,7 @@ void ath5k_hw_set_clockrate(struct ath5k_hw *ah); void ath5k_hw_start_rx_dma(struct ath5k_hw *ah); int ath5k_hw_stop_rx_dma(struct ath5k_hw *ah); u32 ath5k_hw_get_rxdp(struct ath5k_hw *ah); -void ath5k_hw_set_rxdp(struct ath5k_hw *ah, u32 phys_addr); +int ath5k_hw_set_rxdp(struct ath5k_hw *ah, u32 phys_addr); int ath5k_hw_start_tx_dma(struct ath5k_hw *ah, unsigned int queue); int ath5k_hw_stop_tx_dma(struct ath5k_hw *ah, unsigned int queue); u32 ath5k_hw_get_txdp(struct ath5k_hw *ah, unsigned int queue); diff --git a/drivers/net/wireless/ath/ath5k/dma.c b/drivers/net/wireless/ath/ath5k/dma.c index bfdfcff42a1e..3fe634f588c2 100644 --- a/drivers/net/wireless/ath/ath5k/dma.c +++ b/drivers/net/wireless/ath/ath5k/dma.c @@ -95,11 +95,18 @@ u32 ath5k_hw_get_rxdp(struct ath5k_hw *ah) * @ah: The &struct ath5k_hw * @phys_addr: RX descriptor address * - * XXX: Should we check if rx is enabled before setting rxdp ? + * Returns -EIO if rx is active */ -void ath5k_hw_set_rxdp(struct ath5k_hw *ah, u32 phys_addr) +int ath5k_hw_set_rxdp(struct ath5k_hw *ah, u32 phys_addr) { + if (ath5k_hw_reg_read(ah, AR5K_CR) & AR5K_CR_RXE) { + ATH5K_DBG(ah->ah_sc, ATH5K_DEBUG_DMA, + "tried to set RXDP while rx was active !\n"); + return -EIO; + } + ath5k_hw_reg_write(ah, phys_addr, AR5K_RXDP); + return 0; } |