From e8325ed87457e07b9ceeb1e7a31df787dd7ee106 Mon Sep 17 00:00:00 2001 From: Nick Kossifidis Date: Tue, 23 Nov 2010 20:52:24 +0200 Subject: [PATCH] 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 Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath5k/ath5k.h | 2 +- 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; } -- 2.20.1