Re: [PATCH] drivers/ata: correct a wrong free function for sata_nvdriver

From: Jeff Garzik
Date: Wed May 16 2007 - 01:21:41 EST


Peer Chen wrote:
For sata_nv driver in kernel 2.6.21 onward, Inside nv_init_one(),use
'hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);' but
using the kfree(hpriv) to free that data struction in nv_remove_one(),
which will cause system hang when removing the sata_nv module.

Change the 'kfree()' function to 'devm_kfree' will fix this bug.

The patch base on kernel 2.6.22-rc1.

Signed-off-by: Peer Chen <pchen@xxxxxxxxxx>
=====================================
--- linux-2.6.22-rc1/drivers/ata/sata_nv.c.orig
+++ linux-2.6.22-rc1/drivers/ata/sata_nv.c
@@ -1619,7 +1619,7 @@ static void nv_remove_one (struct pci_de
struct nv_host_priv *hpriv = host->private_data;
ata_pci_remove_one(pdev);
- kfree(hpriv);
+ devm_kfree(&pci_dev->dev, hpriv);

This patch is complete crap. It doesn't even compile. There is no variable "pci_dev" in this function at all.

It is highly discouraging that you cannot even bother to compile your own submissions to the second (or third) most popular operating system in the world.

Jeff


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