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| author | Pavel Roskin <proski@gnu.org> | 2010-02-23 18:15:27 -0500 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2010-03-09 15:03:06 -0500 |
| commit | 74bad5cb497080514c4a945f38589bdb574fdfb7 (patch) | |
| tree | 769baaf1d6c61e2a1d69eb2af19cd813415321c6 /drivers/net/wireless/ath/ath9k/mac.c | |
| parent | b4d59a9317e41faec3d0b6a03f0454d1e8abb710 (diff) | |
| download | linux-stable-74bad5cb497080514c4a945f38589bdb574fdfb7.tar.gz linux-stable-74bad5cb497080514c4a945f38589bdb574fdfb7.tar.bz2 linux-stable-74bad5cb497080514c4a945f38589bdb574fdfb7.zip | |
ath9k: never read from the AR_IMR_S2 register
The AR_IMR_S2 register sometimes cannot be read correctly. Instead of a
valid value, 0xdeadbeef is returned. The driver has been observed
writing that value back to AR_IMR_S2 after changing a few bits.
Cache the register value in ah->imrs2_reg and always write chached value
to the register.
Signed-off-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/mac.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/mac.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/net/wireless/ath/ath9k/mac.c b/drivers/net/wireless/ath/ath9k/mac.c index efc420cd42bf..589490b69ddc 100644 --- a/drivers/net/wireless/ath/ath9k/mac.c +++ b/drivers/net/wireless/ath/ath9k/mac.c @@ -31,8 +31,10 @@ static void ath9k_hw_set_txq_interrupts(struct ath_hw *ah, REG_WRITE(ah, AR_IMR_S1, SM(ah->txerr_interrupt_mask, AR_IMR_S1_QCU_TXERR) | SM(ah->txeol_interrupt_mask, AR_IMR_S1_QCU_TXEOL)); - REG_RMW_FIELD(ah, AR_IMR_S2, - AR_IMR_S2_QCU_TXURN, ah->txurn_interrupt_mask); + + ah->imrs2_reg &= ~AR_IMR_S2_QCU_TXURN; + ah->imrs2_reg |= (ah->txurn_interrupt_mask & AR_IMR_S2_QCU_TXURN); + REG_WRITE(ah, AR_IMR_S2, ah->imrs2_reg); } u32 ath9k_hw_gettxbuf(struct ath_hw *ah, u32 q) |