diff options
| author | Vijay Kumar <vijaykumar@bravegnu.org> | 2008-10-29 08:58:40 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-01-06 13:52:04 -0800 |
| commit | 1b8ee916f5e5f0de1367a5a437ba504a96953836 (patch) | |
| tree | e01797dc0f00166cd6bd66375300ddf1c03900c1 /drivers/staging/poch | |
| parent | bf437012503cc99519e20b4a8bddf830cdaae794 (diff) | |
Staging: poch: Fine grained locking
Lock only the portion of code that does register access.
Signed-off-by: Vijay Kumar <vijaykumar@bravegnu.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/poch')
| -rw-r--r-- | drivers/staging/poch/poch.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/staging/poch/poch.c b/drivers/staging/poch/poch.c index 3ecbd7c43c4..1f14792b917 100644 --- a/drivers/staging/poch/poch.c +++ b/drivers/staging/poch/poch.c @@ -485,27 +485,30 @@ static void channel_dma_init(struct channel_info *channel) /* The DMA address page register is shared between the RX and * TX channels, so acquire lock. */ - spin_lock(channel->iomem_lock); for (i = 0; i < channel->group_count; i++) { page = i / 32; group_in_page = i % 32; group_reg = group_regs_base + (group_in_page * 4); + spin_lock(channel->iomem_lock); iowrite32(page, fpga + FPGA_DMA_ADR_PAGE_REG); iowrite32(channel->groups[i].dma_addr, fpga + group_reg); + spin_unlock(channel->iomem_lock); } + for (i = 0; i < channel->group_count; i++) { page = i / 32; group_in_page = i % 32; group_reg = group_regs_base + (group_in_page * 4); + spin_lock(channel->iomem_lock); iowrite32(page, fpga + FPGA_DMA_ADR_PAGE_REG); printk(KERN_INFO PFX "%ld: read dma_addr: 0x%x\n", i, ioread32(fpga + group_reg)); + spin_unlock(channel->iomem_lock); } - spin_unlock(channel->iomem_lock); } |