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Date: Fri, 20 Oct 2017 18:14:11 +0200
From: SF Markus Elfring <elfring@...rs.sourceforge.net>
To: linux-ia64@...r.kernel.org, Fenghua Yu <fenghua.yu@...el.com>,
Oleg Nesterov <oleg@...hat.com>,
Tony Luck <tony.luck@...el.com>
Cc: LKML <linux-kernel@...r.kernel.org>,
kernel-janitors@...r.kernel.org
Subject: [PATCH] ia64/kernel/ptrace: Use common error handling code in two
functions
From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Fri, 20 Oct 2017 18:00:52 +0200
* Add a jump target so that a bit of exception handling can be better
reused at the end of these functions.
This issue was detected by using the Coccinelle software.
* Adjust the indentation for six if statements.
Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
arch/ia64/kernel/ptrace.c | 63 +++++++++++++++++++++++++----------------------
1 file changed, 33 insertions(+), 30 deletions(-)
diff --git a/arch/ia64/kernel/ptrace.c b/arch/ia64/kernel/ptrace.c
index 3f8293378a83..447e3f353014 100644
--- a/arch/ia64/kernel/ptrace.c
+++ b/arch/ia64/kernel/ptrace.c
@@ -1537,11 +1537,10 @@ void do_gpregs_get(struct unw_frame_info *info, void *arg)
(dst->pos + dst->count) : ELF_GR_OFFSET(16);
for (i = dst->pos; i < min_copy; i += sizeof(elf_greg_t),
index++)
- if (access_elf_reg(dst->target, info, i,
- &tmp[index], 0) < 0) {
- dst->ret = -EIO;
- return;
- }
+ if (access_elf_reg(dst->target, info, i, &tmp[index], 0)
+ < 0)
+ goto e_io;
+
dst->ret = user_regset_copyout(&dst->pos, &dst->count,
&dst->u.get.kbuf, &dst->u.get.ubuf, tmp,
ELF_GR_OFFSET(1), ELF_GR_OFFSET(16));
@@ -1566,11 +1565,10 @@ void do_gpregs_get(struct unw_frame_info *info, void *arg)
(dst->pos + dst->count) : ELF_CR_IIP_OFFSET;
for (i = dst->pos; i < min_copy; i += sizeof(elf_greg_t),
index++)
- if (access_elf_reg(dst->target, info, i,
- &tmp[index], 0) < 0) {
- dst->ret = -EIO;
- return;
- }
+ if (access_elf_reg(dst->target, info, i, &tmp[index], 0)
+ < 0)
+ goto e_io;
+
dst->ret = user_regset_copyout(&dst->pos, &dst->count,
&dst->u.get.kbuf, &dst->u.get.ubuf, tmp,
ELF_NAT_OFFSET, ELF_CR_IIP_OFFSET);
@@ -1587,15 +1585,19 @@ void do_gpregs_get(struct unw_frame_info *info, void *arg)
(dst->pos + dst->count) : ELF_AR_END_OFFSET;
for (i = dst->pos; i < min_copy; i += sizeof(elf_greg_t),
index++)
- if (access_elf_reg(dst->target, info, i,
- &tmp[index], 0) < 0) {
- dst->ret = -EIO;
- return;
- }
+ if (access_elf_reg(dst->target, info, i, &tmp[index], 0)
+ < 0)
+ goto e_io;
+
dst->ret = user_regset_copyout(&dst->pos, &dst->count,
&dst->u.get.kbuf, &dst->u.get.ubuf, tmp,
ELF_CR_IIP_OFFSET, ELF_AR_END_OFFSET);
}
+
+ return;
+
+e_io:
+ dst->ret = -EIO;
}
void do_gpregs_set(struct unw_frame_info *info, void *arg)
@@ -1628,11 +1630,10 @@ void do_gpregs_set(struct unw_frame_info *info, void *arg)
if (dst->ret)
return;
for ( ; i < dst->pos; i += sizeof(elf_greg_t), index++)
- if (access_elf_reg(dst->target, info, i,
- &tmp[index], 1) < 0) {
- dst->ret = -EIO;
- return;
- }
+ if (access_elf_reg(dst->target, info, i, &tmp[index], 1)
+ < 0)
+ goto e_io;
+
if (dst->count == 0)
return;
}
@@ -1657,11 +1658,10 @@ void do_gpregs_set(struct unw_frame_info *info, void *arg)
if (dst->ret)
return;
for (; i < dst->pos; i += sizeof(elf_greg_t), index++)
- if (access_elf_reg(dst->target, info, i,
- &tmp[index], 1) < 0) {
- dst->ret = -EIO;
- return;
- }
+ if (access_elf_reg(dst->target, info, i, &tmp[index], 1)
+ < 0)
+ goto e_io;
+
if (dst->count == 0)
return;
}
@@ -1678,12 +1678,15 @@ void do_gpregs_set(struct unw_frame_info *info, void *arg)
if (dst->ret)
return;
for ( ; i < dst->pos; i += sizeof(elf_greg_t), index++)
- if (access_elf_reg(dst->target, info, i,
- &tmp[index], 1) < 0) {
- dst->ret = -EIO;
- return;
- }
+ if (access_elf_reg(dst->target, info, i, &tmp[index], 1)
+ < 0)
+ goto e_io;
}
+
+ return;
+
+e_io:
+ dst->ret = -EIO;
}
#define ELF_FP_OFFSET(i) (i * sizeof(elf_fpreg_t))
--
2.14.2
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