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Message-ID: <20130326160307.GD7136@oc6784271780.ibm.com>
Date: Tue, 26 Mar 2013 11:03:07 -0500
From: "Philip J. Kelleher" <pjk1939@...ux.vnet.ibm.com>
To: Jens Axboe <axboe@...nel.dk>
Cc: linux-kernel@...r.kernel.org, klebers@...ux.vnet.ibm.com
Subject: [PATCHv2 01/02] block: removes dynamic allocation on stack
From: Philip J Kelleher <pjk1939@...ux.vnet.ibm.com>
Removing the dynamic allocation on the stack.
Signed-off-by: Philip J Kelleher <pjk1939@...ux.vnet.ibm.com>
-------------------------------------------------------------------------------
o Version 2 consists of the error checking that was foolishly left out.
o Added error checking to multiple functions to support the dynamically
allocated list_head array.
diff -uprN -X linux-block/Documentation/dontdiff linux-block-vanilla/drivers/block/rsxx/core.c linux-block/drivers/block/rsxx/core.c
--- linux-block-vanilla/drivers/block/rsxx/core.c 2013-03-26 09:56:33.508217353 -0500
+++ linux-block/drivers/block/rsxx/core.c 2013-03-26 10:00:21.211964584 -0500
@@ -323,10 +323,11 @@ static int card_shutdown(struct rsxx_car
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_d
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_d
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(stru
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_detec
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;
}
diff -uprN -X linux-block/Documentation/dontdiff linux-block-vanilla/drivers/block/rsxx/dma.c linux-block/drivers/block/rsxx/dma.c
--- linux-block-vanilla/drivers/block/rsxx/dma.c 2013-03-26 09:57:10.071023932 -0500
+++ linux-block/drivers/block/rsxx/dma.c 2013-03-26 09:57:22.186976829 -0500
@@ -980,7 +980,7 @@ void rsxx_dma_destroy(struct rsxx_cardin
}
}
-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 rs
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 rs
}
kfree(issued_dmas);
+
+ return 0;
}
void rsxx_eeh_cancel_dmas(struct rsxx_cardinfo *card)
diff -uprN -X linux-block/Documentation/dontdiff linux-block-vanilla/drivers/block/rsxx/rsxx_priv.h linux-block/drivers/block/rsxx/rsxx_priv.h
--- linux-block-vanilla/drivers/block/rsxx/rsxx_priv.h 2013-03-26 09:56:33.531059843 -0500
+++ linux-block/drivers/block/rsxx/rsxx_priv.h 2013-03-26 09:57:22.192990813 -0500
@@ -381,7 +381,7 @@ int rsxx_dma_queue_bio(struct rsxx_cardi
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);
--
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