48 lines
1.5 KiB
Diff
48 lines
1.5 KiB
Diff
From bb7e7aeb3d832059e33b1e76eb85d4680f77abf2 Mon Sep 17 00:00:00 2001
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From: Ben Hutchings <ben@decadent.org.uk>
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Date: Fri, 3 Jun 2016 01:08:36 +0100
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Subject: [PATCH] phram: Use memremap() to allow mapping of system RAM
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Using memremap() instead of ioremap() allows mapping a disk image in
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system RAM that has somehow been reserved. It should fall back
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to ioremap() where necessary.
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Entirely untested, and I'm not convinced this is a good idea at all.
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---
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drivers/mtd/devices/phram.c | 7 ++++---
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1 file changed, 4 insertions(+), 3 deletions(-)
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diff --git a/drivers/mtd/devices/phram.c b/drivers/mtd/devices/phram.c
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index 8b66e52ca3cc..0ea254e2ba51 100644
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--- a/drivers/mtd/devices/phram.c
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+++ b/drivers/mtd/devices/phram.c
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@@ -88,7 +88,7 @@ static void unregister_devices(void)
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list_for_each_entry_safe(this, safe, &phram_list, list) {
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mtd_device_unregister(&this->mtd);
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- iounmap(this->mtd.priv);
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+ memunmap(this->mtd.priv);
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kfree(this->mtd.name);
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kfree(this);
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}
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@@ -104,7 +104,8 @@ static int register_device(char *name, phys_addr_t start, size_t len)
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goto out0;
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ret = -EIO;
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- new->mtd.priv = ioremap(start, len);
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+ new->mtd.priv = memremap(start, len,
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+ MEMREMAP_WB | MEMREMAP_WT | MEMREMAP_WC);
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if (!new->mtd.priv) {
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pr_err("ioremap failed\n");
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goto out1;
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@@ -134,7 +135,7 @@ static int register_device(char *name, phys_addr_t start, size_t len)
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return 0;
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out2:
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- iounmap(new->mtd.priv);
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+ memunmap(new->mtd.priv);
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out1:
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kfree(new);
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out0:
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