linux-kernel - [RFC] mips: ath79: clock:- Unmap region obtained by of

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Date:   Mon, 6 Feb 2017 21:24:35 +0100
From:   Marion & Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     antonynpavlov@...il.com, antonynpavlov@...il.com, albeu@...e.fr,
        hackpascal@...il.com, Stephen Boyd <sboyd@...eaurora.org>
Cc:     linux-mips@...ux-mips.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Kernel Janitors <kernel-janitors@...r.kernel.org>
Subject: [RFC] mips: ath79: clock:- Unmap region obtained by of_iomap

Hi,

I had a patch similar to:

https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/arch/mips/ath79/clock.c?id=b3d91db3f71d5f70ea60d900425a3f96aeb3d065

in my own tree.

However, mine was slightly different and was also freeing the memory 
mapping in the normal case, when 'pll_base' seems to be no more useful.

Best regards,

CJ

=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+

diff --git a/arch/mips/ath79/clock.c b/arch/mips/ath79/clock.c
index c1102cffe37d..b5d81acb2d7a 100644
--- a/arch/mips/ath79/clock.c
+++ b/arch/mips/ath79/clock.c
@@ -508,9 +508,11 @@ static void __init ath79_clocks_init_dt_ng(struct 
device_node *np)
          ar9330_clk_init(ref_clk, pll_base);
      else {
          pr_err("%s: could not find any appropriate clk_init()\n", dnfn);
-        goto err_clk;
+        goto err_unmap;
      }

+    iounmap(pll_base);
+
      if (of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data)) {
          pr_err("%s: could not register clk provider\n", dnfn);
          goto err_clk;
@@ -518,6 +520,8 @@ static void __init ath79_clocks_init_dt_ng(struct 
device_node *np)

      return;

+err_unmap:
+    iounmap(pll_base);
  err_clk:
      clk_put(ref_clk);