Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1034299AbcJ0XWC (ORCPT ); Thu, 27 Oct 2016 19:22:02 -0400 Received: from mail-qt0-f177.google.com ([209.85.216.177]:33212 "EHLO mail-qt0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030400AbcJ0XWA (ORCPT ); Thu, 27 Oct 2016 19:22:00 -0400 From: Laura Abbott To: Michael Turquette , Stephen Boyd , Loc Ho Cc: Laura Abbott , linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] clk: xgene: Don't call __pa on ioremaped address Date: Thu, 27 Oct 2016 16:21:48 -0700 Message-Id: <1477610508-7449-1-git-send-email-labbott@redhat.com> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1915 Lines: 55 ioremaped addresses are not linearly mapped so the physical address can not be figured out via __pa. More generally, there is no guarantee that backing value of an ioremapped address is a physical address at all. The value here is only used for debugging so just drop the call to __pa on the ioremapped address. Signed-off-by: Laura Abbott --- Found while working on virt_to_phys debugging for arm64 --- drivers/clk/clk-xgene.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/drivers/clk/clk-xgene.c b/drivers/clk/clk-xgene.c index 3433132..4697bf9 100644 --- a/drivers/clk/clk-xgene.c +++ b/drivers/clk/clk-xgene.c @@ -243,22 +243,20 @@ static int xgene_clk_enable(struct clk_hw *hw) struct xgene_clk *pclk = to_xgene_clk(hw); unsigned long flags = 0; u32 data; - phys_addr_t reg; if (pclk->lock) spin_lock_irqsave(pclk->lock, flags); if (pclk->param.csr_reg != NULL) { pr_debug("%s clock enabled\n", clk_hw_get_name(hw)); - reg = __pa(pclk->param.csr_reg); /* First enable the clock */ data = xgene_clk_read(pclk->param.csr_reg + pclk->param.reg_clk_offset); data |= pclk->param.reg_clk_mask; xgene_clk_write(data, pclk->param.csr_reg + pclk->param.reg_clk_offset); - pr_debug("%s clock PADDR base %pa clk offset 0x%08X mask 0x%08X value 0x%08X\n", - clk_hw_get_name(hw), ®, + pr_debug("%s clk offset 0x%08X mask 0x%08X value 0x%08X\n", + clk_hw_get_name(hw), pclk->param.reg_clk_offset, pclk->param.reg_clk_mask, data); @@ -269,7 +267,7 @@ static int xgene_clk_enable(struct clk_hw *hw) xgene_clk_write(data, pclk->param.csr_reg + pclk->param.reg_csr_offset); pr_debug("%s CSR RESET PADDR base %pa csr offset 0x%08X mask 0x%08X value 0x%08X\n", - clk_hw_get_name(hw), ®, + clk_hw_get_name(hw), pclk->param.reg_csr_offset, pclk->param.reg_csr_mask, data); } -- 2.7.4