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| author | Felix Fietkau <nbd@openwrt.org> | 2015-04-12 22:10:40 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2015-04-12 22:10:40 +0000 |
| commit | afafbc0d7454cb3271477698782cdf3197d06295 (patch) | |
| tree | 0cf5aeb23108f087330c144a02e97f0aa48d2bae /target/linux/generic/patches-3.18/077-09-bgmac-increase-rx-ring-size-from-511-to-512.patch | |
| parent | 09722d0bdcce6a021ec20bdefc158878ce49b8dc (diff) | |
| download | upstream-afafbc0d7454cb3271477698782cdf3197d06295.tar.gz upstream-afafbc0d7454cb3271477698782cdf3197d06295.tar.bz2 upstream-afafbc0d7454cb3271477698782cdf3197d06295.zip | |
kernel: bgmac: add more DMA related fixes
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
SVN-Revision: 45407
Diffstat (limited to 'target/linux/generic/patches-3.18/077-09-bgmac-increase-rx-ring-size-from-511-to-512.patch')
| -rw-r--r-- | target/linux/generic/patches-3.18/077-09-bgmac-increase-rx-ring-size-from-511-to-512.patch | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.18/077-09-bgmac-increase-rx-ring-size-from-511-to-512.patch b/target/linux/generic/patches-3.18/077-09-bgmac-increase-rx-ring-size-from-511-to-512.patch new file mode 100644 index 0000000000..4888cc32af --- /dev/null +++ b/target/linux/generic/patches-3.18/077-09-bgmac-increase-rx-ring-size-from-511-to-512.patch @@ -0,0 +1,23 @@ +From: Felix Fietkau <nbd@openwrt.org> +Date: Sun, 12 Apr 2015 22:36:16 +0200 +Subject: [PATCH] bgmac: increase rx ring size from 511 to 512 + +Limiting it to 511 looks like a failed attempt at leaving one descriptor +empty to allow the hardware to stop processing a buffer that has not +been prepared yet. However, this doesn't work because this affects the +total ring size as well + +Signed-off-by: Felix Fietkau <nbd@openwrt.org> +--- + +--- a/drivers/net/ethernet/broadcom/bgmac.h ++++ b/drivers/net/ethernet/broadcom/bgmac.h +@@ -356,7 +356,7 @@ + #define BGMAC_MAX_RX_RINGS 1 + + #define BGMAC_TX_RING_SLOTS 128 +-#define BGMAC_RX_RING_SLOTS 512 - 1 /* Why -1? Well, Broadcom does that... */ ++#define BGMAC_RX_RING_SLOTS 512 + + #define BGMAC_RX_HEADER_LEN 28 /* Last 24 bytes are unused. Well... */ + #define BGMAC_RX_FRAME_OFFSET 30 /* There are 2 unused bytes between header and real data */ |