libertas: fix power save issue in libertas_sdio module
The problem: "iwconfig ethX power on" returns error
The cause: "ps_supported" flag was never set for SD8385/8686
The fix: check firmware capabilities returned by GET_HW_SPEC command.
Set "ps_supported" to 1 if FW_CAPINFO_PS bit is on. This fix applies
to SDIO interface only.
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/libertas/if_sdio.c b/drivers/net/wireless/libertas/if_sdio.c
index 4519d73..9878368 100644
--- a/drivers/net/wireless/libertas/if_sdio.c
+++ b/drivers/net/wireless/libertas/if_sdio.c
@@ -209,6 +209,9 @@
event = sdio_readb(card->func, IF_SDIO_EVENT, &ret);
if (ret)
goto out;
+
+ /* right shift 3 bits to get the event id */
+ event >>= 3;
} else {
if (size < 4) {
lbs_deb_sdio("event packet too small (%d bytes)\n",
@@ -921,6 +924,9 @@
if (ret)
goto err_activate_card;
+ if (priv->fwcapinfo & FW_CAPINFO_PS)
+ priv->ps_supported = 1;
+
out:
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);