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Commit 1b8ee916 authored by Vijay Kumar's avatar Vijay Kumar Committed by Greg Kroah-Hartman
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Staging: poch: Fine grained locking 



Lock only the portion of code that does register access.

Signed-off-by: default avatarVijay Kumar <vijaykumar@bravegnu.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent bf437012

drivers/staging/poch/poch.c

+5 −2
Original line number Diff line number Diff line
@@ -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);

	}



}