Re: [PATCH 5/6] usb: host: ehci-tegra: Use devm_ioremap_resource instead of devm_ioremap

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Hello.

On 05/10/2014 01:57 PM, Vivek Gautam wrote:

Using devm_ioremap_resource() API should actually be preferred over
devm_ioremap(), since the former request the mem region first and then
gives back the ioremap'ed memory pointer.
devm_ioremap_resource() calls request_mem_region(), therby preventing
other drivers to make any overlapping call to the same region.

Signed-off-by: Vivek Gautam <gautam.vivek@xxxxxxxxxxx>
---
  drivers/usb/host/ehci-tegra.c |    3 +--
  1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index 572634c..ccc6433 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -411,9 +411,8 @@ static int tegra_ehci_probe(struct platform_device *pdev)
  	}
  	hcd->rsrc_start = res->start;
  	hcd->rsrc_len = resource_size(res);
-	hcd->regs = devm_ioremap(&pdev->dev, res->start, resource_size(res));
+	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
  	if (!hcd->regs) {

This has to be changed as well as devm_ioremap_resource() returns error, not NULL.

-		dev_err(&pdev->dev, "Failed to remap I/O memory\n");
  		err = -ENOMEM;

This needs to be changed as well, to pass up the error code devm_ioremap_resource() returned.

WBR, Sergei

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