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Commit 82eff9db authored by Kristian Høgsberg's avatar Kristian Høgsberg Committed by Stefan Richter
Browse files

firewire: Use dma_mapping_error() for checking for DMA mapping errors. 



Pointed out by Pete Zaitcev.

Signed-off-by: default avatarKristian Høgsberg <krh@redhat.com>
Signed-off-by: default avatarStefan Richter <stefanr@s5r6.in-berlin.de>
parent 27a15e50

drivers/firewire/fw-iso.c

+15 −6
Original line number Diff line number Diff line
@@ -33,7 +33,7 @@ setup_iso_buffer(struct fw_iso_context *ctx, size_t size, 
		 enum dma_data_direction direction)

{

	struct page *page;

	int i;

	int i, j;

	void *p;



	ctx->buffer_size = PAGE_ALIGN(size);
@@ -42,24 +42,33 @@ setup_iso_buffer(struct fw_iso_context *ctx, size_t size, 


	ctx->buffer = vmalloc_32_user(ctx->buffer_size);

	if (ctx->buffer == NULL)

		return -ENOMEM;

		goto fail_buffer_alloc;



	ctx->page_count = ctx->buffer_size >> PAGE_SHIFT;

	ctx->pages =

	    kzalloc(ctx->page_count * sizeof(ctx->pages[0]), GFP_KERNEL);

	if (ctx->pages == NULL) {

		vfree(ctx->buffer);

		return -ENOMEM;

	}

	if (ctx->pages == NULL)

		goto fail_pages_alloc;



	p = ctx->buffer;

	for (i = 0; i < ctx->page_count; i++, p += PAGE_SIZE) {

		page = vmalloc_to_page(p);

		ctx->pages[i] = dma_map_page(ctx->card->device,

					     page, 0, PAGE_SIZE, direction);

		if (dma_mapping_error(ctx->pages[i]))

			goto fail_mapping;

	}



	return 0;



 fail_mapping:

	for (j = 0; j < i; j++)

		dma_unmap_page(ctx->card->device, ctx->pages[j],

			       PAGE_SIZE, DMA_TO_DEVICE);

 fail_pages_alloc:

	vfree(ctx->buffer);

 fail_buffer_alloc:

	return -ENOMEM;

}



static void destroy_iso_buffer(struct fw_iso_context *ctx)

drivers/firewire/fw-ohci.c

+15 −8
Original line number Diff line number Diff line
@@ -431,7 +431,7 @@ at_context_setup_packet(struct at_context *ctx, struct list_head *list) 
						     packet->payload,

						     packet->payload_length,

						     DMA_TO_DEVICE);

		if (packet->payload_bus == 0) {

		if (dma_mapping_error(packet->payload_bus)) {

			complete_transmission(packet, RCODE_SEND_ERROR, list);

			return;

		}
@@ -590,7 +590,7 @@ at_context_init(struct at_context *ctx, struct fw_ohci *ohci, u32 regs) 
	ctx->descriptor_bus =

		dma_map_single(ohci->card.device, &ctx->d,

			       sizeof ctx->d, DMA_TO_DEVICE);

	if (ctx->descriptor_bus == 0)

	if (dma_mapping_error(ctx->descriptor_bus))

		return -ENOMEM;



	ctx->regs = regs;
@@ -1159,16 +1159,14 @@ static struct fw_iso_context *ohci_allocate_iso_context(struct fw_card *card, 
	tasklet_init(&ctx->tasklet, tasklet, (unsigned long)ctx);



	ctx->buffer = kmalloc(ISO_BUFFER_SIZE, GFP_KERNEL);

	if (ctx->buffer == NULL) {

		spin_lock_irqsave(&ohci->lock, flags);

		*mask |= 1 << index;

		spin_unlock_irqrestore(&ohci->lock, flags);

		return ERR_PTR(-ENOMEM);

	}

	if (ctx->buffer == NULL)

		goto buffer_alloc_failed;



	ctx->buffer_bus =

	    dma_map_single(card->device, ctx->buffer,

			   ISO_BUFFER_SIZE, DMA_TO_DEVICE);

	if (dma_mapping_error(ctx->buffer_bus))

		goto buffer_map_failed;



	ctx->head_descriptor      = ctx->buffer;

	ctx->prev_descriptor      = ctx->buffer;
@@ -1187,6 +1185,15 @@ static struct fw_iso_context *ohci_allocate_iso_context(struct fw_card *card, 
	ctx->head_descriptor++;



	return &ctx->base;



 buffer_map_failed:

	kfree(ctx->buffer);

 buffer_alloc_failed:

	spin_lock_irqsave(&ohci->lock, flags);

	*mask |= 1 << index;

	spin_unlock_irqrestore(&ohci->lock, flags);



	return ERR_PTR(-ENOMEM);

}



static int ohci_send_iso(struct fw_iso_context *base, s32 cycle)

drivers/firewire/fw-sbp2.c

+17 −11
Original line number Diff line number Diff line
@@ -411,13 +411,13 @@ sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation, 
	orb->base.request_bus =

		dma_map_single(device->card->device, &orb->request,

			       sizeof orb->request, DMA_TO_DEVICE);

	if (orb->base.request_bus == 0)

	if (dma_mapping_error(orb->base.request_bus))

		goto out;



	orb->response_bus =

		dma_map_single(device->card->device, &orb->response,

			       sizeof orb->response, DMA_FROM_DEVICE);

	if (orb->response_bus == 0)

	if (dma_mapping_error(orb->response_bus))

		goto out;



	orb->request.response.high    = 0;
@@ -963,22 +963,20 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) 
	 * transfer direction not handled. */

	if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) {

		fw_error("Cannot handle DMA_BIDIRECTIONAL - rejecting command");

		cmd->result = DID_ERROR << 16;

		done(cmd);

		return 0;

		goto fail_alloc;

	}



	orb = kzalloc(sizeof *orb, GFP_ATOMIC);

	if (orb == NULL) {

		fw_notify("failed to alloc orb\n");

		cmd->result = DID_NO_CONNECT << 16;

		done(cmd);

		return 0;

		goto fail_alloc;

	}



	orb->base.request_bus =

		dma_map_single(device->card->device, &orb->request,

			       sizeof orb->request, DMA_TO_DEVICE);

	if (dma_mapping_error(orb->base.request_bus))

		goto fail_mapping;



	orb->unit = unit;

	orb->done = done;
@@ -1009,9 +1007,7 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) 
		 * could we get the scsi or blk layer to do that by

		 * reporting our max supported block size? */

		fw_error("command > 64k\n");

		cmd->result = DID_ERROR << 16;

		done(cmd);

		return 0;

		goto fail_bufflen;

	} else if (cmd->request_bufflen > 0) {

		sbp2_command_orb_map_buffer(orb);

	}
@@ -1028,6 +1024,16 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) 
		      sd->command_block_agent_address + SBP2_ORB_POINTER);



	return 0;



 fail_bufflen:

	dma_unmap_single(device->card->device, orb->base.request_bus,

			 sizeof orb->request, DMA_TO_DEVICE);

 fail_mapping:

	kfree(orb);

 fail_alloc:

	cmd->result = DID_ERROR << 16;

	done(cmd);

	return 0;

}



static int sbp2_scsi_slave_alloc(struct scsi_device *sdev)