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staging: brcm80211: got rid of #ifdef __mips__ by new dma_spin_for_len() 

Code cleanup.

Cc: devel@linuxdriverproject.org
Cc: linux-wireless@vger.kernel.org
Reviewed-by: Henry Ptasinski <henryp@broadcom.com>
Reviewed-by: Brett Rudley <brudley@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Roland Vossen 2011-05-13 11:59:25 +02:00 committed by Greg Kroah-Hartman
parent de3170671a
commit f626574676
2 changed files with 20 additions and 10 deletions
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11
drivers/staging/brcm80211/brcmsmac/hnddma.c
View File

@ -728,16 +728,7 @@ static void *_dma_rx(dma_info_t *di)
len = le16_to_cpu(*(u16 *) (head->data));
DMA_TRACE(("%s: dma_rx len %d\n", di->name, len));
#if defined(__mips__)
#define OSL_UNCACHED(va) ((void *)KSEG1ADDR((va)))
if (!len) {
while (!(len = *(u16 *) OSL_UNCACHED(head->data)))
udelay(1);
*(u16 *) (head->data) = cpu_to_le16((u16) len);
}
#endif /* defined(__mips__) */
dma_spin_for_len(len, head);
/* set actual length */
pkt_len = min((di->rxoffset + len), di->rxbufsize);

19
drivers/staging/brcm80211/include/hnddma.h
View File

@ -204,4 +204,23 @@ extern const di_fcn_t dma64proc;
extern uint dma_addrwidth(si_t *sih, void *dmaregs);
void dma_walk_packets(struct hnddma_pub *dmah, void (*callback_fnc)
(void *pkt, void *arg_a), void *arg_a);
/*
* DMA(Bug) on some chips seems to declare that the packet is ready, but the
* packet length is not updated yet (by DMA) on the expected time.
* Workaround is to hold processor till DMA updates the length, and stay off
* the bus to allow DMA update the length in buffer
*/
static inline void dma_spin_for_len(uint len, struct sk_buff *head)
{
#if defined(__mips__)
if (!len) {
while (!(len = *(u16 *) KSEG1ADDR(head->data)))
udelay(1);
*(u16 *) (head->data) = cpu_to_le16((u16) len);
}
#endif /* defined(__mips__) */
}
#endif /* _hnddma_h_ */