Hello.
On 06/20/2014 08:48 PM, Himangi Saraogi wrote:
This patch introduces the use of managed interface devm_ioremap_resource
for ioremap_nocache and request_mem_region and removes the corresponding
free functions in the probe and remove functions.
Signed-off-by: Himangi Saraogi <himangi774@xxxxxxxxx>
---
drivers/usb/host/xhci-plat.c | 25 +++++--------------------
1 file changed, 5 insertions(+), 20 deletions(-)
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 29d8adb..31d14a5 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -140,18 +140,11 @@ static int xhci_plat_probe(struct platform_device *pdev)
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
- if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
- driver->description)) {
- dev_dbg(&pdev->dev, "controller already in use\n");
- ret = -EBUSY;
- goto put_hcd;
- }
-
- hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
- if (!hcd->regs) {
+ hcd->regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(hcd->regs)) {
dev_dbg(&pdev->dev, "error mapping memory\n");
This line is worth removing -- devm_ioremap_resource() complains loudly on
errors.
- ret = -EFAULT;
- goto release_mem_region;
+ ret = PTR_ERR(hcd->regs);
+ goto put_hcd;
}
WBR, Sergei
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