Re: [PATCH] rtlwifi: Fix PCI probe error path orphaned memory

From: Tim Gardner
Date: Thu Feb 02 2012 - 18:59:30 EST

On 02/02/2012 04:26 PM, Larry Finger wrote:
On 02/02/2012 02:48 PM, Tim Gardner wrote:
Memory allocated by ieee80211_alloc_hw() will get orphaned
if any subsequent initializations fail.

Also don't pci_set_drvdata(pdev, NULL) until just before disabling
the PCI device. Functions called by rtl_deinit_core(hw) may eventually
the context (when its actually implemented).

Cc: Larry Finger<Larry.Finger@xxxxxxxxxxxx>
Cc: Chaoming Li<chaoming_li@xxxxxxxxxxxxxx>
Cc: John W. Linville<linville@xxxxxxxxxxxxx>
Cc: linux-wireless@xxxxxxxxxxxxxxx
Cc: netdev@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Tim Gardner<tim.gardner@xxxxxxxxxxxxx>
drivers/net/wireless/rtlwifi/pci.c | 19 ++++++++++++-------
1 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/drivers/net/wireless/rtlwifi/pci.c
index 5cb2199..6b18063 100644
--- a/drivers/net/wireless/rtlwifi/pci.c
+++ b/drivers/net/wireless/rtlwifi/pci.c
@@ -1760,8 +1760,8 @@ int __devinit rtl_pci_probe(struct pci_dev *pdev,
if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) {
"Unable to obtain 32bit DMA for consistent allocations\n");
- pci_disable_device(pdev);
- return -ENOMEM;
+ err = -ENOMEM;
+ goto fail1;

I would probably added a new label after the ieee80211_free_hw() and
used it here to avoid the "if (hw)" test, but that is a matter of
choice. In any case this patch is correct.

ACKed-by: Larry Finger <Larry.Finger@xxxxxxxxxxxx>



Actually, I started doing that but it turned into a huge patch, so I just decided to solved the immediate issue (discovered by inspection). There are some other setup/teardown nonorthogonalities that need fixing first (which I'm pursuing as time allows).

Tim Gardner tim.gardner@xxxxxxxxxxxxx
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