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-spear.c | 13 +++----------
1 file changed, 3 insertions(+), 10 deletions(-)
diff --git a/drivers/usb/host/ehci-spear.c b/drivers/usb/host/ehci-spear.c
index 8bd915b..1d59958 100644
--- a/drivers/usb/host/ehci-spear.c
+++ b/drivers/usb/host/ehci-spear.c
@@ -106,16 +106,9 @@ static int spear_ehci_hcd_drv_probe(struct platform_device *pdev)
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
- if (!devm_request_mem_region(&pdev->dev, hcd->rsrc_start, hcd->rsrc_len,
- driver->description)) {
- retval = -EBUSY;
- goto err_put_hcd;
- }
-
- hcd->regs = devm_ioremap(&pdev->dev, hcd->rsrc_start, hcd->rsrc_len);
- if (hcd->regs == NULL) {
- dev_dbg(&pdev->dev, "error mapping memory\n");
- retval = -ENOMEM;
+ hcd->regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(hcd->regs)) {
+ retval = PTR_ERR(hcd->regs);
goto err_put_hcd;
}
--
1.7.10.4
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