netdev - [patch 2.6.35 19/25] wimax/i2400m: SDIO specific TX queue's minimum buffer room for new message

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Date:	Fri, 14 May 2010 14:45:18 -0700
From:	Inaky Perez-Gonzalez <inaky@...ux.intel.com>
To:	netdev@...r.kernel.org, wimax@...uxwimax.org
Cc:	"Prasanna S. Panchamukhi" <prasannax.s.panchamukhi@...el.com>
Subject: [patch 2.6.35 19/25] wimax/i2400m: SDIO specific TX queue's minimum buffer room for new message

From: Prasanna S. Panchamukhi <prasannax.s.panchamukhi@...el.com>

This patch specifies the TX queue's minimum buffer room required to
accommodate one smallest SDIO payload.
Please refer the documentation in the code.

Signed-off-by: Prasanna S. Panchamukhi <prasannax.s.panchamukhi@...el.com>
---
 drivers/net/wimax/i2400m/sdio.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/net/wimax/i2400m/sdio.c b/drivers/net/wimax/i2400m/sdio.c
index 7632f80..9bfc26e 100644
--- a/drivers/net/wimax/i2400m/sdio.c
+++ b/drivers/net/wimax/i2400m/sdio.c
@@ -483,6 +483,13 @@ int i2400ms_probe(struct sdio_func *func,
 	sdio_set_drvdata(func, i2400ms);

 	i2400m->bus_tx_block_size = I2400MS_BLK_SIZE;
+	/*
+	 * Room required in the TX queue for SDIO message to accommodate
+	 * a smallest payload while allocating header space is 224 bytes,
+	 * which is the smallest message size(the block size 256 bytes)
+	 * minus the smallest message header size(32 bytes).
+	 */
+	i2400m->bus_tx_room_min = I2400MS_BLK_SIZE - I2400M_PL_ALIGN * 2;
 	i2400m->bus_pl_size_max = I2400MS_PL_SIZE_MAX;
 	i2400m->bus_setup = i2400ms_bus_setup;
 	i2400m->bus_dev_start = i2400ms_bus_dev_start;
-- 
1.6.6.1

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