Commit 4dcaf472 authored by Philip J Kelleher's avatar Philip J Kelleher Committed by Jens Axboe
Browse files

rsxx: enable error return of rsxx_eeh_save_issued_dmas() 



Commit d8d595df introduced a bug where we did not check for a NULL
return from kmalloc(). Make rsxx_eeh_save_issued_dmas() return an
error for that case, and make the callers handle that.

Signed-off-by: default avatarPhilip J Kelleher <pjk1939@linux.vnet.ibm.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent d8d595df

drivers/block/rsxx/core.c

+16 −3
Original line number Diff line number Diff line
@@ -323,10 +323,11 @@ static int card_shutdown(struct rsxx_cardinfo *card) 
	return 0;

}



static void rsxx_eeh_frozen(struct pci_dev *dev)

static int rsxx_eeh_frozen(struct pci_dev *dev)

{

	struct rsxx_cardinfo *card = pci_get_drvdata(dev);

	int i;

	int st;



	dev_warn(&dev->dev, "IBM FlashSystem PCI: preparing for slot reset.\n");
@@ -342,7 +343,9 @@ static void rsxx_eeh_frozen(struct pci_dev *dev) 


	pci_disable_device(dev);



	rsxx_eeh_save_issued_dmas(card);

	st = rsxx_eeh_save_issued_dmas(card);

	if (st)

		return st;



	rsxx_eeh_save_issued_creg(card);
@@ -356,6 +359,8 @@ static void rsxx_eeh_frozen(struct pci_dev *dev) 
					    card->ctrl[i].cmd.buf,

					    card->ctrl[i].cmd.dma_addr);

	}



	return 0;

}



static void rsxx_eeh_failure(struct pci_dev *dev)
@@ -399,6 +404,8 @@ static int rsxx_eeh_fifo_flush_poll(struct rsxx_cardinfo *card) 
static pci_ers_result_t rsxx_error_detected(struct pci_dev *dev,

					    enum pci_channel_state error)

{

	int st;



	if (dev->revision < RSXX_EEH_SUPPORT)

		return PCI_ERS_RESULT_NONE;
@@ -407,7 +414,13 @@ static pci_ers_result_t rsxx_error_detected(struct pci_dev *dev, 
		return PCI_ERS_RESULT_DISCONNECT;

	}



	rsxx_eeh_frozen(dev);

	st = rsxx_eeh_frozen(dev);

	if (st) {

		dev_err(&dev->dev, "Slot reset setup failed\n");

		rsxx_eeh_failure(dev);

		return PCI_ERS_RESULT_DISCONNECT;

	}



	return PCI_ERS_RESULT_NEED_RESET;

}

drivers/block/rsxx/dma.c

+5 −1
Original line number Diff line number Diff line
@@ -980,7 +980,7 @@ void rsxx_dma_destroy(struct rsxx_cardinfo *card) 
	}

}



void rsxx_eeh_save_issued_dmas(struct rsxx_cardinfo *card)

int rsxx_eeh_save_issued_dmas(struct rsxx_cardinfo *card)

{

	int i;

	int j;
@@ -990,6 +990,8 @@ void rsxx_eeh_save_issued_dmas(struct rsxx_cardinfo *card) 


	issued_dmas = kzalloc(sizeof(*issued_dmas) * card->n_targets,

			      GFP_KERNEL);

	if (!issued_dmas)

		return -ENOMEM;



	for (i = 0; i < card->n_targets; i++) {

		INIT_LIST_HEAD(&issued_dmas[i]);
@@ -1030,6 +1032,8 @@ void rsxx_eeh_save_issued_dmas(struct rsxx_cardinfo *card) 
	}



	kfree(issued_dmas);



	return 0;

}



void rsxx_eeh_cancel_dmas(struct rsxx_cardinfo *card)

drivers/block/rsxx/rsxx_priv.h

+1 −1
Original line number Diff line number Diff line
@@ -381,7 +381,7 @@ int rsxx_dma_queue_bio(struct rsxx_cardinfo *card, 
			   rsxx_dma_cb cb,

			   void *cb_data);

int rsxx_hw_buffers_init(struct pci_dev *dev, struct rsxx_dma_ctrl *ctrl);

void rsxx_eeh_save_issued_dmas(struct rsxx_cardinfo *card);

int rsxx_eeh_save_issued_dmas(struct rsxx_cardinfo *card);

void rsxx_eeh_cancel_dmas(struct rsxx_cardinfo *card);

int rsxx_eeh_remap_dmas(struct rsxx_cardinfo *card);