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| author |   Michael Zoran <mzoran@crowfest.net> | 2017-02-18 03:22:01 -0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-02-26 17:05:48 +0100 |
| commit | 6cf1bf636a067eb308cb3a8322b9d6b1844a075d (patch) | |
| tree | 9fb47bc5a7b9f29c6284c1c4017f1679c876d477 /drivers/staging | |
| parent | staging: bcm2835/mmal-vchiq: unlock on error in buffer_from_host() (diff) | |
| download | linux-dev-6cf1bf636a067eb308cb3a8322b9d6b1844a075d.tar.xz linux-dev-6cf1bf636a067eb308cb3a8322b9d6b1844a075d.zip | |
staging: vchiq_2835_arm: Make cache-line-size a required DT property
The original github source allowed for the cache-line-size property
to be missing. Since recent firmwares also require this property,
it makes sense to always require it in the driver as well.
If the cache-line-size property is missing, then the driver probe
should fail as no dev since the kernel and dt may be out of sync.
The fix is to add a check for the return value of of_property_read_u32.
Changes V2:
1. Add error message if cache-line-size is missing.
2. Simple check for non-zero return value from
of_property_read_u32.
Signed-off-by: Michael Zoran <mzoran@crowfest.net>
Acked-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging')
| -rw-r--r-- | drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c index e6241fb5cfa6..3aeffcb9c87e 100644 --- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c +++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c @@ -121,8 +121,14 @@ int vchiq_platform_init(struct platform_device *pdev, VCHIQ_STATE_T *state) if (err < 0) return err; - (void)of_property_read_u32(dev->of_node, "cache-line-size", + err = of_property_read_u32(dev->of_node, "cache-line-size", &g_cache_line_size); + + if (err) { + dev_err(dev, "Missing cache-line-size property\n"); + return -ENODEV; + } + g_fragments_size = 2 * g_cache_line_size; /* Allocate space for the channels in coherent memory */ |