| From | Greg Kroah-Hartman <> | Subject | [ 21/58] b43: Increase number of RX DMA slots | Date | Mon, 25 Feb 2013 14:19:17 -0800 |
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3.7-stable review patch. If anyone has any objections, please let me know.
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From: Larry Finger <Larry.Finger@lwfinger.net>
commit ccae0e50c16a7f7adb029c169147400d1ce9f703 upstream.
Bastian Bittorf reported that some of the silent freezes on a Linksys WRT54G were due to overflow of the RX DMA ring buffer, which was created with 64 slots. That finding reminded me that I was seeing similar crashed on a netbook, which also has a relatively slow processor. After increasing the number of slots to 128, runs on the netbook that previously failed now worked; however, I found that 109 slots had been used in one test. For that reason, the number of slots is being increased to 256.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net> Cc: Bastian Bittorf <bittorf@bluebottle.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/net/wireless/b43/dma.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/wireless/b43/dma.h +++ b/drivers/net/wireless/b43/dma.h @@ -169,7 +169,7 @@ struct b43_dmadesc_generic { /* DMA engine tuning knobs */ #define B43_TXRING_SLOTS 256 -#define B43_RXRING_SLOTS 64 +#define B43_RXRING_SLOTS 256 #define B43_DMA0_RX_FW598_BUFSIZE (B43_DMA0_RX_FW598_FO + IEEE80211_MAX_FRAME_LEN) #define B43_DMA0_RX_FW351_BUFSIZE (B43_DMA0_RX_FW351_FO + IEEE80211_MAX_FRAME_LEN)
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