[PATCH linux-next v2] staging/rtl8821ae: fix sparse address space warning

[PATCH linux-next v2] staging/rtl8821ae: fix sparse address space warning

[Anders Darander]

Change the definition of pci_mem_start|end from correct from pci_io(un)map's
point of view.

Signed-off-by: Anders Darander <anders.darander@gmail.com>
---

Changes v1 -> v2:
	* Change the struct definition instead of casting all
	  pci_iomap and pci_iounmap calls.

 drivers/staging/rtl8821ae/pci.c  | 14 +++++++-------
 drivers/staging/rtl8821ae/wifi.h |  4 ++--
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/staging/rtl8821ae/pci.c b/drivers/staging/rtl8821ae/pci.c
index a562aa6..5306e66 100644
--- a/drivers/staging/rtl8821ae/pci.c
+++ b/drivers/staging/rtl8821ae/pci.c
@@ -2313,16 +2313,16 @@ int __devinit rtl_pci_probe(struct pci_dev *pdev,
 
 	/*shared mem start */
 	rtlpriv->io.pci_mem_start =
-			(unsigned long)pci_iomap(pdev,
+			pci_iomap(pdev,
 			rtlpriv->cfg->bar_id, pmem_len);
-	if (rtlpriv->io.pci_mem_start == 0) {
+	if (rtlpriv->io.pci_mem_start == NULL) {
 		RT_ASSERT(false, ("Can't map PCI mem\n"));
 		goto fail2;
 	}
 
 	RT_TRACE(COMP_INIT, DBG_DMESG,
 		 ("mem mapped space: start: 0x%08lx len:%08lx "
-		  "flags:%08lx, after map:0x%08lx\n",
+		  "flags:%08lx, after map:0x%p\n",
 		  pmem_start, pmem_len, pmem_flags,
 		  rtlpriv->io.pci_mem_start));
 
@@ -2415,8 +2415,8 @@ fail3:
 	rtl_deinit_core(hw);
 	ieee80211_free_hw(hw);
 
-	if (rtlpriv->io.pci_mem_start != 0)
-		pci_iounmap(pdev, (void *)rtlpriv->io.pci_mem_start);
+	if (rtlpriv->io.pci_mem_start != NULL )
+		pci_iounmap(pdev, rtlpriv->io.pci_mem_start);
 
 fail2:
 	pci_release_regions(pdev);
@@ -2478,8 +2478,8 @@ void rtl_pci_disconnect(struct pci_dev *pdev)
 		pci_disable_msi(rtlpci->pdev);
 
 	list_del(&rtlpriv->list);
-	if (rtlpriv->io.pci_mem_start != 0) {
-		pci_iounmap(pdev, (void *)rtlpriv->io.pci_mem_start);
+	if (rtlpriv->io.pci_mem_start != NULL) {
+		pci_iounmap(pdev, rtlpriv->io.pci_mem_start);
 		pci_release_regions(pdev);
 	}
 
diff --git a/drivers/staging/rtl8821ae/wifi.h b/drivers/staging/rtl8821ae/wifi.h
index 17a9d9f..e8250da 100644
--- a/drivers/staging/rtl8821ae/wifi.h
+++ b/drivers/staging/rtl8821ae/wifi.h
@@ -1086,8 +1086,8 @@ struct rtl_io {
 	struct device *dev;
 
 	/*PCI MEM map */
-	unsigned long pci_mem_end;	/*shared mem end        */
-	unsigned long pci_mem_start;	/*shared mem start */
+	void __iomem *pci_mem_end;	/*shared mem end        */
+	void __iomem *pci_mem_start;	/*shared mem start */
 
 	/*PCI IO map */
 	unsigned long pci_base_addr;	/*device I/O address */
-- 
2.0.0.rc0

Re: [PATCH linux-next v2] staging/rtl8821ae: fix sparse address space warning

[Dan Carpenter]

On Wed, Apr 23, 2014 at 02:59:46PM +0200, Anders Darander wrote:
> Change the definition of pci_mem_start|end from correct from pci_io(un)map's
> point of view.
>

Terrific.  Thanks!

If you really wanted to then you could just delete pci_mem_end and also
you could remove all the casting of pci_mem_start in
drivers/staging/rtl8821ae/pci.h but this patch is an improvement on its
own so someone can do that later if they want.

Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>

regards,
dan carpenter