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wimax/i2400m: limit the message size upto 16KiB [v1]

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According to Intel Wimax i3200, i5x50 and i6x50 specification
documents, the maximum size of each TX message can be upto 16KiB.
This patch modifies the i2400m_tx() routine to check that the
message size does not exceed the 16KiB limit.
Please refer the documentation in the code for details.

Signed-off-by: Prasanna S. Panchamukhi <prasannax.s.panchamukhi@intel.com>
This commit is contained in:
Prasanna S. Panchamukhi 2010-04-08 16:24:28 -07:00 committed by Inaky Perez-Gonzalez
parent e6dd789af1
commit a40242f2cd
1 changed files with 12 additions and 1 deletions
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13
drivers/net/wimax/i2400m/tx.c
View file

@ -282,6 +282,11 @@ enum {
I2400M_TX_PLD_SIZE = sizeof(struct i2400m_msg_hdr)
+ I2400M_TX_PLD_MAX * sizeof(struct i2400m_pld),
I2400M_TX_SKIP = 0x80000000,
/*
* According to Intel Wimax i3200, i5x50 and i6x50 specification
* documents, the maximum size of each message can be up to 16KiB.
*/
I2400M_TX_MSG_SIZE = 16384,
/*
* 16 byte aligned MAX_MTU + 4 byte payload prefix.
*/
@ -682,7 +687,13 @@ int i2400m_tx(struct i2400m *i2400m, const void *buf, size_t buf_len,
}
if (i2400m->tx_msg == NULL)
goto error_tx_new;
if (i2400m->tx_msg->size + padded_len > I2400M_TX_BUF_SIZE / 2) {
/*
* Check if this skb will fit in the TX queue's current active
* TX message. The total message size must not exceed the maximum
* size of each message I2400M_TX_MSG_SIZE. If it exceeds,
* close the current message and push this skb into the new message.
*/
if (i2400m->tx_msg->size + padded_len > I2400M_TX_MSG_SIZE) {
d_printf(2, dev, "TX: message too big, going new\n");
i2400m_tx_close(i2400m);
i2400m_tx_new(i2400m);