ssb: fix init regression of hostmode PCI core

Our workarounds seem to be clientmode PCI specific. Using SPROM
workaround on SoC resulted in Oops:

Data bus error, epc == 8017ed58, ra == 80225838
 Oops[#1]:
 Cpu 0
 $ 0   : 00000000 10008000 b8000000 00000001
 $ 4   : 80293b5c 00000caa ffffffff 00000000
 $ 8   : 0000000a 00000003 00000001 696d6d20
 $12   : ffffffff 00000000 00000000 ffffffff
 $16   : 802d0140 b8004800 802c0000 00000000
 $20   : 00000000 802c0000 00000000 802d04d4
 $24   : 00000018 80151a00
 $28   : 81816000 81817df8 8029bda0 80225838
 Hi    : 00000000
 Lo    : 00000000
 epc   : 8017ed58 ssb_ssb_read16+0x48/0x60
   Not tainted
 ra    : 80225838 ssb_pcicore_init+0x54/0x3b4

Reported-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Tested-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/ssb/driver_pcicore.c b/drivers/ssb/driver_pcicore.c
index 2a20dabec76d722d1c311aad9e1e34a13382b6d2..d6620ad309ce9489f35358cf6644bd20b8e96888 100644 (file)
--- a/drivers/ssb/driver_pcicore.c
+++ b/drivers/ssb/driver_pcicore.c
@@ -516,8 +516,17 @@ static void ssb_pcicore_pcie_setup_workarounds(struct ssb_pcicore *pc)
 
 static void ssb_pcicore_init_clientmode(struct ssb_pcicore *pc)
 {
+       ssb_pcicore_fix_sprom_core_index(pc);
+
        /* Disable PCI interrupts. */
        ssb_write32(pc->dev, SSB_INTVEC, 0);
+
+       /* Additional PCIe always once-executed workarounds */
+       if (pc->dev->id.coreid == SSB_DEV_PCIE) {
+               ssb_pcicore_serdes_workaround(pc);
+               /* TODO: ASPM */
+               /* TODO: Clock Request Update */
+       }
 }
 
 void ssb_pcicore_init(struct ssb_pcicore *pc)
@@ -529,8 +538,6 @@ void ssb_pcicore_init(struct ssb_pcicore *pc)
        if (!ssb_device_is_enabled(dev))
                ssb_device_enable(dev, 0);
 
-       ssb_pcicore_fix_sprom_core_index(pc);
-
 #ifdef CONFIG_SSB_PCICORE_HOSTMODE
        pc->hostmode = pcicore_is_in_hostmode(pc);
        if (pc->hostmode)
@@ -538,13 +545,6 @@ void ssb_pcicore_init(struct ssb_pcicore *pc)
 #endif /* CONFIG_SSB_PCICORE_HOSTMODE */
        if (!pc->hostmode)
                ssb_pcicore_init_clientmode(pc);
-
-       /* Additional PCIe always once-executed workarounds */
-       if (dev->id.coreid == SSB_DEV_PCIE) {
-               ssb_pcicore_serdes_workaround(pc);
-               /* TODO: ASPM */
-               /* TODO: Clock Request Update */
-       }
 }
 
 static u32 ssb_pcie_read(struct ssb_pcicore *pc, u32 address)