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| author | Hauke Mehrtens <hauke@hauke-m.de> | 2015-08-02 20:26:52 +0200 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2015-08-10 22:20:46 +0300 |
| commit | 53cd2fdb00aab34f91762f6345f83625a30480f0 (patch) | |
| tree | fd6d98807ed921b7e2ccdd7d2257bfc9dc7083f9 | |
| parent | 78623bfb6f4cbdba3183621e8e0e781611217022 (diff) | |
| download | linux-stable-53cd2fdb00aab34f91762f6345f83625a30480f0.tar.gz linux-stable-53cd2fdb00aab34f91762f6345f83625a30480f0.tar.bz2 linux-stable-53cd2fdb00aab34f91762f6345f83625a30480f0.zip | |
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>
| -rw-r--r-- | drivers/bcma/bcma_private.h | 1 | ||||
| -rw-r--r-- | drivers/bcma/main.c | 30 |
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); } |