diff options
| author | Laxman Dewangan <ldewangan@nvidia.com> | 2012-03-06 14:22:14 +0530 |
|---|---|---|
| committer | Simone Willett <swillett@nvidia.com> | 2012-03-06 20:08:38 -0800 |
| commit | 091ea4f9c2cfdba2e72bd2c1ccf4a67df159d1be (patch) | |
| tree | e648a86cb88392e529cb78906bd7ce13cfc64065 /arch/arm/mach-tegra/dma.c | |
| parent | 86373a7e882d9ce6d45964701ff13c7a2d8b02f5 (diff) | |
ARM: tegra: dma: Check request size before enqueuing requests
The request size should be multiple of 4 bytes in ONE_SHOT and
CONTINUOUS_SINGLE mode and multiple of 8 bytes in case of
CONTINUOUS_DOUBLE mode.
Change-Id: Iedb7a75eedda58f4f9b5c6d072ef2edb7ee657d4
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/87994
Reviewed-by: Bitan Biswas <bbiswas@nvidia.com>
Diffstat (limited to 'arch/arm/mach-tegra/dma.c')
| -rw-r--r-- | arch/arm/mach-tegra/dma.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/dma.c b/arch/arm/mach-tegra/dma.c index 9882366fb8c7..f882d4293bec 100644 --- a/arch/arm/mach-tegra/dma.c +++ b/arch/arm/mach-tegra/dma.c @@ -427,6 +427,14 @@ int tegra_dma_enqueue_req(struct tegra_dma_channel *ch, return -EINVAL; } + if ((req->size & 0x3) || + ((ch->mode & TEGRA_DMA_MODE_CONTINUOUS_DOUBLE) && (req->size & 0x7))) + { + pr_err("Invalid DMA request size 0x%08x for channel %d\n", + req->size, ch->id); + return -EINVAL; + } + spin_lock_irqsave(&ch->lock, irq_flags); list_for_each_entry(_req, &ch->list, node) { |