[PATCH v1] efi/apple-properties: Use memremap() instead of ioremap()

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



The memory we are accessing through virtual address has no IO side
effects. Moreover, for IO memory we have to use special accessors,
which we don't use.

Due to above, convert the driver to use memremap() instead of ioremap().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
 drivers/firmware/efi/apple-properties.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/firmware/efi/apple-properties.c b/drivers/firmware/efi/apple-properties.c
index b9602e0d7b50..adaa9a3714b9 100644
--- a/drivers/firmware/efi/apple-properties.c
+++ b/drivers/firmware/efi/apple-properties.c
@@ -19,6 +19,7 @@
 
 #include <linux/bootmem.h>
 #include <linux/efi.h>
+#include <linux/io.h>
 #include <linux/platform_data/x86/apple.h>
 #include <linux/property.h>
 #include <linux/slab.h>
@@ -189,7 +190,7 @@ static int __init map_properties(void)
 
 	pa_data = boot_params.hdr.setup_data;
 	while (pa_data) {
-		data = ioremap(pa_data, sizeof(*data));
+		data = memremap(pa_data, sizeof(*data), MEMREMAP_WB);
 		if (!data) {
 			pr_err("cannot map setup_data header\n");
 			return -ENOMEM;
@@ -197,14 +198,14 @@ static int __init map_properties(void)
 
 		if (data->type != SETUP_APPLE_PROPERTIES) {
 			pa_data = data->next;
-			iounmap(data);
+			memunmap(data);
 			continue;
 		}
 
 		data_len = data->len;
-		iounmap(data);
+		memunmap(data);
 
-		data = ioremap(pa_data, sizeof(*data) + data_len);
+		data = memremap(pa_data, sizeof(*data) + data_len, MEMREMAP_WB);
 		if (!data) {
 			pr_err("cannot map setup_data payload\n");
 			return -ENOMEM;
@@ -229,7 +230,7 @@ static int __init map_properties(void)
 		 * to avoid breaking the chain of ->next pointers.
 		 */
 		data->len = 0;
-		iounmap(data);
+		memunmap(data);
 		free_bootmem_late(pa_data + sizeof(*data), data_len);
 
 		return ret;
-- 
2.16.1

--
To unsubscribe from this list: send the line "unsubscribe linux-efi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Security]     [Bugtraq]     [Linux OMAP]     [Linux MIPS]     [ECOS]     [Asterisk Internet PBX]     [Linux API]

  Powered by Linux