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>
diff --git a/drivers/staging/brcm80211/brcmsmac/hnddma.c b/drivers/staging/brcm80211/brcmsmac/hnddma.c
index 962010f..f607315 100644
--- a/drivers/staging/brcm80211/brcmsmac/hnddma.c
+++ b/drivers/staging/brcm80211/brcmsmac/hnddma.c
@@ -728,16 +728,7 @@
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);
diff --git a/drivers/staging/brcm80211/include/hnddma.h b/drivers/staging/brcm80211/include/hnddma.h
index 5d079e7..fbbcb9b5 100644
--- a/drivers/staging/brcm80211/include/hnddma.h
+++ b/drivers/staging/brcm80211/include/hnddma.h
@@ -204,4 +204,23 @@
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_ */