From: Martin Fuzzey <mfuzzey@gmail.com>
Date: Fri, 6 Nov 2009 20:21:27 +0000 (+0100)
Subject: ssb-pcmcia: Fix 32bit register access in early bus scanning
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d8e235227899474976302cf272e5c2b756eb32de;p=linux-beck.git

ssb-pcmcia: Fix 32bit register access in early bus scanning

The scan function was using 32 bit access which does not
work on 16bit CF cards.

This patch corrects this by doing two 16 bit reads like
ssb_pcmcia_read32 already does.

mb -- Removed locking. That early in init there's no need for locking.

Signed-off-by: Martin Fuzzey <mfuzzey@gmail.com>
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/drivers/ssb/scan.c b/drivers/ssb/scan.c
index b74212d698c7..e8b89e8ac9bd 100644
--- a/drivers/ssb/scan.c
+++ b/drivers/ssb/scan.c
@@ -162,6 +162,8 @@ static u8 chipid_to_nrcores(u16 chipid)
 static u32 scan_read32(struct ssb_bus *bus, u8 current_coreidx,
 		       u16 offset)
 {
+	u32 lo, hi;
+
 	switch (bus->bustype) {
 	case SSB_BUSTYPE_SSB:
 		offset += current_coreidx * SSB_CORE_SIZE;
@@ -174,7 +176,9 @@ static u32 scan_read32(struct ssb_bus *bus, u8 current_coreidx,
 			offset -= 0x800;
 		} else
 			ssb_pcmcia_switch_segment(bus, 0);
-		break;
+		lo = readw(bus->mmio + offset);
+		hi = readw(bus->mmio + offset + 2);
+		return lo | (hi << 16);
 	case SSB_BUSTYPE_SDIO:
 		offset += current_coreidx * SSB_CORE_SIZE;
 		return ssb_sdio_scan_read32(bus, offset);