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Message-Id: <1257389031-20429-1-git-send-email-dfeng@redhat.com>
Date: Thu, 5 Nov 2009 10:43:51 +0800
From: Xiaotian Feng <dfeng@...hat.com>
To: tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
x86@...nel.org, venkatesh.pallipadi@...el.com,
suresh.b.siddha@...el.com
Cc: linux-kernel@...r.kernel.org, Xiaotian Feng <dfeng@...hat.com>
Subject: [PATCH V2] x86: fix error return sequence in __ioremap_caller
kernel missed to free memtype if get_vm_area_caller failed in __ioremap_caller.
This patch introduces error path to fix this and cleanup the repetitive error
return sequence.
Signed-off-by: Xiaotian Feng <dfeng@...hat.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>
Cc: Suresh Siddha <suresh.b.siddha@...el.com>
---
arch/x86/mm/ioremap.c | 24 +++++++++++-------------
1 files changed, 11 insertions(+), 13 deletions(-)
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 334e63c..7574575 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -170,8 +170,7 @@ static void __iomem *__ioremap_caller(resource_size_t phys_addr,
(unsigned long long)phys_addr,
(unsigned long long)(phys_addr + size),
prot_val, new_prot_val);
- free_memtype(phys_addr, phys_addr + size);
- return NULL;
+ goto err_free_memtype;
}
prot_val = new_prot_val;
}
@@ -197,26 +196,25 @@ static void __iomem *__ioremap_caller(resource_size_t phys_addr,
*/
area = get_vm_area_caller(size, VM_IOREMAP, caller);
if (!area)
- return NULL;
+ goto err_free_memtype;
area->phys_addr = phys_addr;
vaddr = (unsigned long) area->addr;
- if (kernel_map_sync_memtype(phys_addr, size, prot_val)) {
- free_memtype(phys_addr, phys_addr + size);
- free_vm_area(area);
- return NULL;
- }
+ if (kernel_map_sync_memtype(phys_addr, size, prot_val))
+ goto err_free_area;
- if (ioremap_page_range(vaddr, vaddr + size, phys_addr, prot)) {
- free_memtype(phys_addr, phys_addr + size);
- free_vm_area(area);
- return NULL;
- }
+ if (ioremap_page_range(vaddr, vaddr + size, phys_addr, prot))
+ goto err_free_area;
ret_addr = (void __iomem *) (vaddr + offset);
mmiotrace_ioremap(unaligned_phys_addr, unaligned_size, ret_addr);
return ret_addr;
+err_free_area:
+ free_vm_area(area);
+err_free_memtype:
+ free_memtype(phys_addr, phys_addr + size);
+ return NULL;
}
/**
--
1.6.2.5
--
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