Do you have a link to the reported crash?
On Wed, Feb 15, 2012 at 07:31:20PM +0100, Felix Fietkau wrote:
> Duplicate the data for iniAddac early on, to avoid having to do redundant
> memcpy calls later. While we're at it, make AR5416 < v2.2 use the same
> codepath. Fixes a reported crash on x86.
>
> Signed-off-by: Felix Fietkau <nbd@xxxxxxxxxxx>
> Reported-by: Magnus Määttä <magnus.maatta@xxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
> ---
> drivers/net/wireless/ath/ath9k/ar5008_phy.c | 25 +------------------------
> drivers/net/wireless/ath/ath9k/ar9002_hw.c | 19 +++++++++++++++++++
> drivers/net/wireless/ath/ath9k/hw.h | 1 -
> 3 files changed, 20 insertions(+), 25 deletions(-)
>
> diff --git a/drivers/net/wireless/ath/ath9k/ar5008_phy.c b/drivers/net/wireless/ath/ath9k/ar5008_phy.c
> index f901a17..86a891f 100644
> --- a/drivers/net/wireless/ath/ath9k/ar5008_phy.c
> +++ b/drivers/net/wireless/ath/ath9k/ar5008_phy.c
> @@ -489,8 +489,6 @@ static int ar5008_hw_rf_alloc_ext_banks(struct ath_hw *ah)
> ATH_ALLOC_BANK(ah->analogBank6Data, ah->iniBank6.ia_rows);
> ATH_ALLOC_BANK(ah->analogBank6TPCData, ah->iniBank6TPC.ia_rows);
> ATH_ALLOC_BANK(ah->analogBank7Data, ah->iniBank7.ia_rows);
> - ATH_ALLOC_BANK(ah->addac5416_21,
> - ah->iniAddac.ia_rows * ah->iniAddac.ia_columns);
> ATH_ALLOC_BANK(ah->bank6Temp, ah->iniBank6.ia_rows);
>
> return 0;
> @@ -519,7 +517,6 @@ static void ar5008_hw_rf_free_ext_banks(struct ath_hw *ah)
> ATH_FREE_BANK(ah->analogBank6Data);
> ATH_FREE_BANK(ah->analogBank6TPCData);
> ATH_FREE_BANK(ah->analogBank7Data);
> - ATH_FREE_BANK(ah->addac5416_21);
> ATH_FREE_BANK(ah->bank6Temp);
>
> #undef ATH_FREE_BANK
> @@ -805,27 +802,7 @@ static int ar5008_hw_process_ini(struct ath_hw *ah,
> if (ah->eep_ops->set_addac)
> ah->eep_ops->set_addac(ah, chan);
>
> - if (AR_SREV_5416_22_OR_LATER(ah)) {
> - REG_WRITE_ARRAY(&ah->iniAddac, 1, regWrites);
> - } else {
> - struct ar5416IniArray temp;
> - u32 addacSize =
> - sizeof(u32) * ah->iniAddac.ia_rows *
> - ah->iniAddac.ia_columns;
> -
> - /* For AR5416 2.0/2.1 */
> - memcpy(ah->addac5416_21,
> - ah->iniAddac.ia_array, addacSize);
> -
> - /* override CLKDRV value at [row, column] = [31, 1] */
> - (ah->addac5416_21)[31 * ah->iniAddac.ia_columns + 1] = 0;
> -
> - temp.ia_array = ah->addac5416_21;
> - temp.ia_columns = ah->iniAddac.ia_columns;
> - temp.ia_rows = ah->iniAddac.ia_rows;
> - REG_WRITE_ARRAY(&temp, 1, regWrites);
> - }
> -
> + REG_WRITE_ARRAY(&ah->iniAddac, 1, regWrites);
> REG_WRITE(ah, AR_PHY_ADC_SERIAL_CTL, AR_PHY_SEL_INTERNAL_ADDAC);
>
> ENABLE_REGWRITE_BUFFER(ah);
> diff --git a/drivers/net/wireless/ath/ath9k/ar9002_hw.c b/drivers/net/wireless/ath/ath9k/ar9002_hw.c
> index 11f192a..d190411 100644
> --- a/drivers/net/wireless/ath/ath9k/ar9002_hw.c
> +++ b/drivers/net/wireless/ath/ath9k/ar9002_hw.c
> @@ -180,6 +180,25 @@ static void ar9002_hw_init_mode_regs(struct ath_hw *ah)
> INIT_INI_ARRAY(&ah->iniAddac, ar5416Addac,
> ARRAY_SIZE(ar5416Addac), 2);
> }
> +
> + /* iniAddac needs to be modified for these chips */
> + if (AR_SREV_9160(ah) || !AR_SREV_5416_22_OR_LATER(ah)) {
> + struct ar5416IniArray *addac = &ah->iniAddac;
> + u32 size = sizeof(u32) * addac->ia_rows * addac->ia_columns;
> + u32 *data;
> +
> + data = kmalloc(size, GFP_KERNEL);
> + if (!data)
> + return;
> +
> + memcpy(data, addac->ia_array, size);
> + addac->ia_array = data;
> +
> + if (!AR_SREV_5416_22_OR_LATER(ah)) {
> + /* override CLKDRV value */
> + INI_RA(addac, 31,1) = 0;
> + }
> + }
> }
>
> /* Support for Japan ch.14 (2484) spread */
> diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
> index 6a29004..c8261d4 100644
> --- a/drivers/net/wireless/ath/ath9k/hw.h
> +++ b/drivers/net/wireless/ath/ath9k/hw.h
> @@ -940,7 +940,6 @@ struct ath_hw {
> u32 *analogBank6Data;
> u32 *analogBank6TPCData;
> u32 *analogBank7Data;
> - u32 *addac5416_21;
> u32 *bank6Temp;
>
> u8 txpower_limit;
> --
> 1.7.3.2
>
>
--
John W. Linville Someday the world will need a hero, and you
linville@xxxxxxxxxxxxx might be all we have. Be ready.
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