b43: fix regression in PIO case

This patch fixes the regression, introduced by

commit 17030f48e31adde5b043741c91ba143f5f7db0fd
From: Rafał Miłecki <zajec5@gmail.com>
Date: Thu, 11 Aug 2011 17:16:27 +0200
Subject: [PATCH] b43: support new RX header, noticed to be used in 598.314+ fw

in PIO case.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 13 insertions, 3 deletions

diff --git a/drivers/net/wireless/b43/pio.c b/drivers/net/wireless/b43/pio.c
index fcff923b3c18..279a53eae4c5 100644
--- a/drivers/net/wireless/b43/pio.c
+++ b/drivers/net/wireless/b43/pio.c
@@ -617,9 +617,19 @@ static bool pio_rx_frame(struct b43_pio_rxqueue *q)
         const char *err_msg = NULL;
         struct b43_rxhdr_fw4 *rxhdr =
                 (struct b43_rxhdr_fw4 *)wl->pio_scratchspace;
+        size_t rxhdr_size = sizeof(*rxhdr);
 
         BUILD_BUG_ON(sizeof(wl->pio_scratchspace) < sizeof(*rxhdr));
-        memset(rxhdr, 0, sizeof(*rxhdr));
+        switch (dev->fw.hdr_format) {
+        case B43_FW_HDR_410:
+        case B43_FW_HDR_351:
+                rxhdr_size -= sizeof(rxhdr->format_598) -
+                        sizeof(rxhdr->format_351);
+                break;
+        case B43_FW_HDR_598:
+                break;
+        }
+        memset(rxhdr, 0, rxhdr_size);
 
         /* Check if we have data and wait for it to get ready. */
         if (q->rev >= 8) {
@@ -657,11 +667,11 @@ data_ready:
 
         /* Get the preamble (RX header) */
         if (q->rev >= 8) {
-                b43_block_read(dev, rxhdr, sizeof(*rxhdr),
+                b43_block_read(dev, rxhdr, rxhdr_size,
                                q->mmio_base + B43_PIO8_RXDATA,
                                sizeof(u32));
         } else {
-                b43_block_read(dev, rxhdr, sizeof(*rxhdr),
+                b43_block_read(dev, rxhdr, rxhdr_size,
                                q->mmio_base + B43_PIO_RXDATA,
                                sizeof(u16));
         }