linux-kernel - RE: [PATCH 3/5] drivers/infiniband: correct size computation

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Date:	Mon, 7 Dec 2009 09:17:14 -0700
From:	"Tung, Chien Tin" <chien.tin.tung@...el.com>
To:	Julia Lawall <julia@...u.dk>,
	"Latif, Faisal" <faisal.latif@...el.com>,
	Roland Dreier <rolandd@...co.com>,
	"Hefty, Sean" <sean.hefty@...el.com>,
	Hal Rosenstock <hal.rosenstock@...il.com>,
	"linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>
Subject: RE: [PATCH 3/5] drivers/infiniband: correct size computation

Thanks for pointing out the bug.  

> 	/* Remap the PCI registers in adapter BAR0 to kernel VA space */
>-	mmio_regs = ioremap_nocache(pci_resource_start(pcidev, BAR_0), sizeof(mmio_regs));
>+	mmio_regs = ioremap_nocache(pci_resource_start(pcidev, BAR_0),
>+				    sizeof(*mmio_regs));
> 	if (mmio_regs == NULL) {
> 		printk(KERN_ERR PFX "Unable to remap BAR0\n");
> 		ret = -EIO;

mmio_regs is initialized to NULL at the top of the function so *mmio_regs wouldn't be
a good idea.  Instead of sizeof(*mmio_regs) use pci_resource_len(pcidev, BAR_0).  If
you can recreate the patch with this change I will ack it.

Thanks,


Chien


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