Rename ohci1394's packet_swab to header_le32_to_cpu to better reflect
what it actually does. Also, define a constant array as 'const' and
check the array index properly.
Signed-off-by: Stefan Richter <[email protected]>
---
Index: linux/drivers/ieee1394/ohci1394.c
===================================================================
--- linux.orig/drivers/ieee1394/ohci1394.c 2006-09-07 15:48:15.000000000 +0200
+++ linux/drivers/ieee1394/ohci1394.c 2006-09-07 20:33:29.000000000 +0200
@@ -181,36 +181,35 @@ static int alloc_dma_trm_ctx(struct ti_o
static void ohci1394_pci_remove(struct pci_dev *pdev);
#ifndef __LITTLE_ENDIAN
-static unsigned hdr_sizes[] =
-{
+const static size_t hdr_sizes[] = {
3, /* TCODE_WRITEQ */
4, /* TCODE_WRITEB */
3, /* TCODE_WRITE_RESPONSE */
- 0, /* ??? */
+ 0, /* reserved */
3, /* TCODE_READQ */
4, /* TCODE_READB */
3, /* TCODE_READQ_RESPONSE */
4, /* TCODE_READB_RESPONSE */
- 1, /* TCODE_CYCLE_START (???) */
+ 1, /* TCODE_CYCLE_START */
4, /* TCODE_LOCK_REQUEST */
2, /* TCODE_ISO_DATA */
4, /* TCODE_LOCK_RESPONSE */
+ /* rest is reserved or link-internal */
};
-/* Swap headers */
-static inline void packet_swab(quadlet_t *data, int tcode)
+static inline void header_le32_to_cpu(quadlet_t *data, unsigned char tcode)
{
- size_t size = hdr_sizes[tcode];
+ size_t size;
- if (tcode > TCODE_LOCK_RESPONSE || hdr_sizes[tcode] == 0)
+ if (unlikely(tcode >= ARRAY_SIZE(hdr_sizes)))
return;
+ size = hdr_sizes[tcode];
while (size--)
- data[size] = swab32(data[size]);
+ data[size] = le32_to_cpu(data[size]);
}
#else
-/* Don't waste cycles on same sex byte swaps */
-#define packet_swab(w,x) do {} while (0)
+#define header_le32_to_cpu(w,x) do {} while (0)
#endif /* !LITTLE_ENDIAN */
/***********************************
@@ -705,7 +704,7 @@ static void insert_packet(struct ti_ohci
d->prg_cpu[idx]->data[2] = packet->header[2];
d->prg_cpu[idx]->data[3] = packet->header[3];
}
- packet_swab(d->prg_cpu[idx]->data, packet->tcode);
+ header_le32_to_cpu(d->prg_cpu[idx]->data, packet->tcode);
}
if (packet->data_size) { /* block transmit */
@@ -781,7 +780,7 @@ static void insert_packet(struct ti_ohci
d->prg_cpu[idx]->data[0] = packet->speed_code<<16 |
(packet->header[0] & 0xFFFF);
d->prg_cpu[idx]->data[1] = packet->header[0] & 0xFFFF0000;
- packet_swab(d->prg_cpu[idx]->data, packet->tcode);
+ header_le32_to_cpu(d->prg_cpu[idx]->data, packet->tcode);
d->prg_cpu[idx]->begin.control =
cpu_to_le32(DMA_CTL_OUTPUT_MORE |
@@ -2735,7 +2734,7 @@ static void dma_rcv_tasklet (unsigned lo
* bus reset. We always ignore it. */
if (tcode != OHCI1394_TCODE_PHY) {
if (!ohci->no_swap_incoming)
- packet_swab(d->spb, tcode);
+ header_le32_to_cpu(d->spb, tcode);
DBGMSG("Packet received from node"
" %d ack=0x%02X spd=%d tcode=0x%X"
" length=%d ctx=%d tlabel=%d",
-
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