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authorHauke Mehrtens <hauke@hauke-m.de>2015-08-02 20:26:52 +0200
committerKalle Valo <kvalo@codeaurora.org>2015-08-10 22:20:46 +0300
commit53cd2fdb00aab34f91762f6345f83625a30480f0 (patch)
treefd6d98807ed921b7e2ccdd7d2257bfc9dc7083f9 /drivers/bcma
parent78623bfb6f4cbdba3183621e8e0e781611217022 (diff)
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bcma: fix access to host_pdev for PCIe devices
bus->host_pdev is part of a union so bus->host_pdev != NULL is probably also true for PCIe devices, because there it accesses bus->host_pci. If we access the dev member at the offset defined in struct platform_device in struct pci_dev instead we probably get something else. This patch adds a new function which returns the host dev struct and NULL if we do not have a host dev. When this gets registered on MIPS brcm47xx we do not have a host dev in some situations. This function could also be used in other places. This problem was introduced in this commit: commit cae761b5a6bdc597ba476a040fdcd5b4bc559b85 Author: Rafa? Mi?ecki <zajec5@gmail.com> Date: Sun Jun 28 17:17:13 2015 +0200 bcma: populate bus DT subnodes as platform_device-s Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/bcma')
-rw-r--r--drivers/bcma/bcma_private.h1
-rw-r--r--drivers/bcma/main.c30
2 files changed, 28 insertions, 3 deletions
diff --git a/drivers/bcma/bcma_private.h b/drivers/bcma/bcma_private.h
index 15f2b2e242ea..38f156745d53 100644
--- a/drivers/bcma/bcma_private.h
+++ b/drivers/bcma/bcma_private.h
@@ -34,6 +34,7 @@ int __init bcma_bus_early_register(struct bcma_bus *bus);
int bcma_bus_suspend(struct bcma_bus *bus);
int bcma_bus_resume(struct bcma_bus *bus);
#endif
+struct device *bcma_bus_get_host_dev(struct bcma_bus *bus);
/* scan.c */
void bcma_detect_chip(struct bcma_bus *bus);
diff --git a/drivers/bcma/main.c b/drivers/bcma/main.c
index 8d973c4fc84e..24882c18fcbe 100644
--- a/drivers/bcma/main.c
+++ b/drivers/bcma/main.c
@@ -7,7 +7,9 @@
#include "bcma_private.h"
#include <linux/module.h>
+#include <linux/mmc/sdio_func.h>
#include <linux/platform_device.h>
+#include <linux/pci.h>
#include <linux/bcma/bcma.h>
#include <linux/slab.h>
#include <linux/of_address.h>
@@ -269,6 +271,28 @@ void bcma_prepare_core(struct bcma_bus *bus, struct bcma_device *core)
}
}
+struct device *bcma_bus_get_host_dev(struct bcma_bus *bus)
+{
+ switch (bus->hosttype) {
+ case BCMA_HOSTTYPE_PCI:
+ if (bus->host_pci)
+ return &bus->host_pci->dev;
+ else
+ return NULL;
+ case BCMA_HOSTTYPE_SOC:
+ if (bus->host_pdev)
+ return &bus->host_pdev->dev;
+ else
+ return NULL;
+ case BCMA_HOSTTYPE_SDIO:
+ if (bus->host_sdio)
+ return &bus->host_sdio->dev;
+ else
+ return NULL;
+ }
+ return NULL;
+}
+
void bcma_init_bus(struct bcma_bus *bus)
{
mutex_lock(&bcma_buses_mutex);
@@ -388,6 +412,7 @@ int bcma_bus_register(struct bcma_bus *bus)
{
int err;
struct bcma_device *core;
+ struct device *dev;
/* Scan for devices (cores) */
err = bcma_bus_scan(bus);
@@ -410,13 +435,12 @@ int bcma_bus_register(struct bcma_bus *bus)
bcma_core_pci_early_init(&bus->drv_pci[0]);
}
+ dev = bcma_bus_get_host_dev(bus);
/* TODO: remove check for IS_BUILTIN(CONFIG_BCMA) check when
* of_default_bus_match_table is exported or in some other way
* accessible. This is just a temporary workaround.
*/
- if (IS_BUILTIN(CONFIG_BCMA) && bus->host_pdev) {
- struct device *dev = &bus->host_pdev->dev;
-
+ if (IS_BUILTIN(CONFIG_BCMA) && dev) {
of_platform_populate(dev->of_node, of_default_bus_match_table,
NULL, dev);
}