From 525c1f9204928649eca475e61bfb21e0b6416dbf Mon Sep 17 00:00:00 2001
From: Kees Cook <keescook@chromium.org>
Date: Wed, 16 Jan 2013 18:54:16 -0800
Subject: lib: remove depends on CONFIG_EXPERIMENTAL
The CONFIG_EXPERIMENTAL config item has not carried much meaning for a
while now and is almost always enabled by default. As agreed during the
Linux kernel summit, remove it from any "depends on" lines in Kconfigs.
CC: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
CC: Dmitry Kasatkin <dmitry.kasatkin@intel.com>
CC: James Morris <james.l.morris@oracle.com>
CC: "Michael S. Tsirkin" <mst@redhat.com>
CC: Akinobu Mita <akinobu.mita@gmail.com>
CC: Ingo Molnar <mingo@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
lib/Kconfig | 2 +-
lib/Kconfig.debug | 2 +-
lib/Kconfig.kgdb | 2 +-
3 files changed, 3 insertions(+), 3 deletions(-)
(limited to 'lib')
diff --git a/lib/Kconfig b/lib/Kconfig
index 75cdb77fa49d..3958dc4389f9 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -322,7 +322,7 @@ config CPUMASK_OFFSTACK
config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS
- depends on EXPERIMENTAL && BROKEN
+ depends on BROKEN
config CPU_RMAP
bool
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 67604e599384..849ecaea2b43 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -455,7 +455,7 @@ config HAVE_DEBUG_KMEMLEAK
config DEBUG_KMEMLEAK
bool "Kernel memory leak detector"
- depends on DEBUG_KERNEL && EXPERIMENTAL && HAVE_DEBUG_KMEMLEAK
+ depends on DEBUG_KERNEL && HAVE_DEBUG_KMEMLEAK
select DEBUG_FS
select STACKTRACE if STACKTRACE_SUPPORT
select KALLSYMS
diff --git a/lib/Kconfig.kgdb b/lib/Kconfig.kgdb
index 43cb93fa2651..77439eb8528d 100644
--- a/lib/Kconfig.kgdb
+++ b/lib/Kconfig.kgdb
@@ -5,7 +5,7 @@ config HAVE_ARCH_KGDB
menuconfig KGDB
bool "KGDB: kernel debugger"
depends on HAVE_ARCH_KGDB
- depends on DEBUG_KERNEL && EXPERIMENTAL
+ depends on DEBUG_KERNEL
help
If you say Y here, it will be possible to remotely debug the
kernel using gdb. It is recommended but not required, that
--
cgit v1.2.2
From f657fd21e16e3ab7432c03008e19069c2ef8e150 Mon Sep 17 00:00:00 2001
From: Joe Perches <joe@perches.com>
Date: Wed, 5 Dec 2012 16:48:26 -0500
Subject: dynamic_debug: Fix vpr_<foo> logging styles
vpr_info_dq should be a function and vpr_info should have
a do {} while (0)
Add missing newlines to pr_<level>s.
Miscellaneous neatening too.
braces, coalescing formats, alignments, etc...
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
lib/dynamic_debug.c | 118 +++++++++++++++++++++++++++-------------------------
1 file changed, 62 insertions(+), 56 deletions(-)
(limited to 'lib')
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index 1db1fc660538..ac7d27737e42 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -59,7 +59,7 @@ struct ddebug_iter {
static DEFINE_MUTEX(ddebug_lock);
static LIST_HEAD(ddebug_tables);
-static int verbose = 0;
+static int verbose;
module_param(verbose, int, 0644);
/* Return the path relative to source root */
@@ -100,24 +100,32 @@ static char *ddebug_describe_flags(struct _ddebug *dp, char *buf,
return buf;
}
-#define vpr_info(fmt, ...) \
- if (verbose) do { pr_info(fmt, ##__VA_ARGS__); } while (0)
-
-#define vpr_info_dq(q, msg) \
+#define vpr_info(fmt, ...) \
do { \
- /* trim last char off format print */ \
- vpr_info("%s: func=\"%s\" file=\"%s\" " \
- "module=\"%s\" format=\"%.*s\" " \
- "lineno=%u-%u", \
- msg, \
- q->function ? q->function : "", \
- q->filename ? q->filename : "", \
- q->module ? q->module : "", \
- (int)(q->format ? strlen(q->format) - 1 : 0), \
- q->format ? q->format : "", \
- q->first_lineno, q->last_lineno); \
+ if (verbose) \
+ pr_info(fmt, ##__VA_ARGS__); \
} while (0)
+static void vpr_info_dq(const struct ddebug_query *query, const char *msg)
+{
+ /* trim any trailing newlines */
+ int fmtlen = 0;
+
+ if (query->format) {
+ fmtlen = strlen(query->format);
+ while (fmtlen && query->format[fmtlen - 1] == '\n')
+ fmtlen--;
+ }
+
+ vpr_info("%s: func=\"%s\" file=\"%s\" module=\"%s\" format=\"%.*s\" lineno=%u-%u\n",
+ msg,
+ query->function ? query->function : "",
+ query->filename ? query->filename : "",
+ query->module ? query->module : "",
+ fmtlen, query->format ? query->format : "",
+ query->first_lineno, query->last_lineno);
+}
+
/*
* Search the tables for _ddebug's which match the given `query' and
* apply the `flags' and `mask' to them. Returns number of matching
@@ -141,7 +149,7 @@ static int ddebug_change(const struct ddebug_query *query,
if (query->module && strcmp(query->module, dt->mod_name))
continue;
- for (i = 0 ; i < dt->num_ddebugs ; i++) {
+ for (i = 0; i < dt->num_ddebugs; i++) {
struct _ddebug *dp = &dt->ddebugs[i];
/* match against the source filename */
@@ -176,10 +184,10 @@ static int ddebug_change(const struct ddebug_query *query,
continue;
dp->flags = newflags;
vpr_info("changed %s:%d [%s]%s =%s\n",
- trim_prefix(dp->filename), dp->lineno,
- dt->mod_name, dp->function,
- ddebug_describe_flags(dp, flagbuf,
- sizeof(flagbuf)));
+ trim_prefix(dp->filename), dp->lineno,
+ dt->mod_name, dp->function,
+ ddebug_describe_flags(dp, flagbuf,
+ sizeof(flagbuf)));
}
}
mutex_unlock(&ddebug_lock);
@@ -213,12 +221,12 @@ static int ddebug_tokenize(char *buf, char *words[], int maxwords)
/* find `end' of word, whitespace separated or quoted */
if (*buf == '"' || *buf == '\'') {
int quote = *buf++;
- for (end = buf ; *end && *end != quote ; end++)
+ for (end = buf; *end && *end != quote; end++)
;
if (!*end)
return -EINVAL; /* unclosed quote */
} else {
- for (end = buf ; *end && !isspace(*end) ; end++)
+ for (end = buf; *end && !isspace(*end); end++)
;
BUG_ON(end == buf);
}
@@ -235,7 +243,7 @@ static int ddebug_tokenize(char *buf, char *words[], int maxwords)
if (verbose) {
int i;
pr_info("split into words:");
- for (i = 0 ; i < nwords ; i++)
+ for (i = 0; i < nwords; i++)
pr_cont(" \"%s\"", words[i]);
pr_cont("\n");
}
@@ -286,11 +294,11 @@ static char *unescape(char *str)
in += 2;
continue;
} else if (isodigit(in[1]) &&
- isodigit(in[2]) &&
- isodigit(in[3])) {
- *out++ = ((in[1] - '0')<<6) |
- ((in[2] - '0')<<3) |
- (in[3] - '0');
+ isodigit(in[2]) &&
+ isodigit(in[3])) {
+ *out++ = (((in[1] - '0') << 6) |
+ ((in[2] - '0') << 3) |
+ (in[3] - '0'));
in += 4;
continue;
}
@@ -308,8 +316,8 @@ static int check_set(const char **dest, char *src, char *name)
if (*dest) {
rc = -EINVAL;
- pr_err("match-spec:%s val:%s overridden by %s",
- name, *dest, src);
+ pr_err("match-spec:%s val:%s overridden by %s\n",
+ name, *dest, src);
}
*dest = src;
return rc;
@@ -345,17 +353,17 @@ static int ddebug_parse_query(char *words[], int nwords,
/* support $modname.dyndbg=<multiple queries> */
query->module = modname;
- for (i = 0 ; i < nwords ; i += 2) {
- if (!strcmp(words[i], "func"))
+ for (i = 0; i < nwords; i += 2) {
+ if (!strcmp(words[i], "func")) {
rc = check_set(&query->function, words[i+1], "func");
- else if (!strcmp(words[i], "file"))
+ } else if (!strcmp(words[i], "file")) {
rc = check_set(&query->filename, words[i+1], "file");
- else if (!strcmp(words[i], "module"))
+ } else if (!strcmp(words[i], "module")) {
rc = check_set(&query->module, words[i+1], "module");
- else if (!strcmp(words[i], "format"))
+ } else if (!strcmp(words[i], "format")) {
rc = check_set(&query->format, unescape(words[i+1]),
- "format");
- else if (!strcmp(words[i], "line")) {
+ "format");
+ } else if (!strcmp(words[i], "line")) {
char *first = words[i+1];
char *last = strchr(first, '-');
if (query->first_lineno || query->last_lineno) {
@@ -410,7 +418,7 @@ static int ddebug_parse_flags(const char *str, unsigned int *flagsp,
}
vpr_info("op='%c'\n", op);
- for ( ; *str ; ++str) {
+ for (; *str ; ++str) {
for (i = ARRAY_SIZE(opt_array) - 1; i >= 0; i--) {
if (*str == opt_array[i].opt_char) {
flags |= opt_array[i].flag;
@@ -459,7 +467,7 @@ static int ddebug_exec_query(char *query_string, const char *modname)
/* actually go and implement the change */
nfound = ddebug_change(&query, flags, mask);
- vpr_info_dq((&query), (nfound) ? "applied" : "no-match");
+ vpr_info_dq(&query, nfound ? "applied" : "no-match");
return nfound;
}
@@ -488,8 +496,9 @@ static int ddebug_exec_queries(char *query, const char *modname)
if (rc < 0) {
errs++;
exitcode = rc;
- } else
+ } else {
nfound += rc;
+ }
i++;
}
vpr_info("processed %d queries, with %d matches, %d errs\n",
@@ -765,7 +774,7 @@ static void *ddebug_proc_next(struct seq_file *m, void *p, loff_t *pos)
struct _ddebug *dp;
vpr_info("called m=%p p=%p *pos=%lld\n",
- m, p, (unsigned long long)*pos);
+ m, p, (unsigned long long)*pos);
if (p == SEQ_START_TOKEN)
dp = ddebug_iter_first(iter);
@@ -791,14 +800,14 @@ static int ddebug_proc_show(struct seq_file *m, void *p)
if (p == SEQ_START_TOKEN) {
seq_puts(m,
- "# filename:lineno [module]function flags format\n");
+ "# filename:lineno [module]function flags format\n");
return 0;
}
seq_printf(m, "%s:%u [%s]%s =%s \"",
- trim_prefix(dp->filename), dp->lineno,
- iter->table->mod_name, dp->function,
- ddebug_describe_flags(dp, flagsbuf, sizeof(flagsbuf)));
+ trim_prefix(dp->filename), dp->lineno,
+ iter->table->mod_name, dp->function,
+ ddebug_describe_flags(dp, flagsbuf, sizeof(flagsbuf)));
seq_escape(m, dp->format, "\t\r\n\"");
seq_puts(m, "\"\n");
@@ -845,7 +854,7 @@ static int ddebug_proc_open(struct inode *inode, struct file *file)
kfree(iter);
return err;
}
- ((struct seq_file *) file->private_data)->private = iter;
+ ((struct seq_file *)file->private_data)->private = iter;
return 0;
}
@@ -1002,8 +1011,7 @@ static int __init dynamic_debug_init(void)
int verbose_bytes = 0;
if (__start___verbose == __stop___verbose) {
- pr_warn("_ddebug table is empty in a "
- "CONFIG_DYNAMIC_DEBUG build");
+ pr_warn("_ddebug table is empty in a CONFIG_DYNAMIC_DEBUG build\n");
return 1;
}
iter = __start___verbose;
@@ -1030,18 +1038,16 @@ static int __init dynamic_debug_init(void)
goto out_err;
ddebug_init_success = 1;
- vpr_info("%d modules, %d entries and %d bytes in ddebug tables,"
- " %d bytes in (readonly) verbose section\n",
- modct, entries, (int)( modct * sizeof(struct ddebug_table)),
- verbose_bytes + (int)(__stop___verbose - __start___verbose));
+ vpr_info("%d modules, %d entries and %d bytes in ddebug tables, %d bytes in (readonly) verbose section\n",
+ modct, entries, (int)(modct * sizeof(struct ddebug_table)),
+ verbose_bytes + (int)(__stop___verbose - __start___verbose));
/* apply ddebug_query boot param, dont unload tables on err */
if (ddebug_setup_string[0] != '\0') {
- pr_warn("ddebug_query param name is deprecated,"
- " change it to dyndbg\n");
+ pr_warn("ddebug_query param name is deprecated, change it to dyndbg\n");
ret = ddebug_exec_queries(ddebug_setup_string, NULL);
if (ret < 0)
- pr_warn("Invalid ddebug boot param %s",
+ pr_warn("Invalid ddebug boot param %s\n",
ddebug_setup_string);
else
pr_info("%d changes by ddebug_query\n", ret);
--
cgit v1.2.2
From 7a555613eb77c69eb6e48b61bc5f72dd42fa1780 Mon Sep 17 00:00:00 2001
From: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Date: Wed, 5 Dec 2012 16:48:27 -0500
Subject: dynamic_debug: dynamic hex dump
Introduce print_hex_dump_debug() that can be dynamically controlled, similar to
pr_debug.
Also, make print_hex_dump_bytes() dynamically controlled
Implement only 'p' flag (_DPRINTK_FLAGS_PRINT) to keep it simple since hex dump prints
multiple lines and long prefix would impact readability.
To provide line/file etc. information, use pr_debug or similar
before/after print_hex_dump_debug()
Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
lib/hexdump.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
(limited to 'lib')
diff --git a/lib/hexdump.c b/lib/hexdump.c
index 6540d657dca4..3f0494c9d57a 100644
--- a/lib/hexdump.c
+++ b/lib/hexdump.c
@@ -227,6 +227,7 @@ void print_hex_dump(const char *level, const char *prefix_str, int prefix_type,
}
EXPORT_SYMBOL(print_hex_dump);
+#if !defined(CONFIG_DYNAMIC_DEBUG)
/**
* print_hex_dump_bytes - shorthand form of print_hex_dump() with default params
* @prefix_str: string to prefix each line with;
@@ -246,4 +247,5 @@ void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
buf, len, true);
}
EXPORT_SYMBOL(print_hex_dump_bytes);
-#endif
+#endif /* !defined(CONFIG_DYNAMIC_DEBUG) */
+#endif /* defined(CONFIG_PRINTK) */
--
cgit v1.2.2
From 18c216c53b29f15b17c4c05a46395fc90ebb6f0c Mon Sep 17 00:00:00 2001
From: Jim Cromie <jim.cromie@gmail.com>
Date: Wed, 5 Dec 2012 16:48:27 -0500
Subject: dynamic_debug: add pr_errs before -EINVALs
Ma noted that dynamic-debug is silent about many query errors, so add
pr_err()s to explain those errors, and tweak a few others. Also parse
flags 1st, so that match-spec errs are slightly clearer.
CC: Jianpeng Ma <majianpeng@gmail.com>
CC: Joe Perches <joe@perches.com>
Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
Signed-off-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
lib/dynamic_debug.c | 47 +++++++++++++++++++++++++++++++++++------------
1 file changed, 35 insertions(+), 12 deletions(-)
(limited to 'lib')
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index ac7d27737e42..5276b99ca650 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -223,8 +223,10 @@ static int ddebug_tokenize(char *buf, char *words[], int maxwords)
int quote = *buf++;
for (end = buf; *end && *end != quote; end++)
;
- if (!*end)
+ if (!*end) {
+ pr_err("unclosed quote: %s\n", buf);
return -EINVAL; /* unclosed quote */
+ }
} else {
for (end = buf; *end && !isspace(*end); end++)
;
@@ -232,8 +234,10 @@ static int ddebug_tokenize(char *buf, char *words[], int maxwords)
}
/* `buf' is start of word, `end' is one past its end */
- if (nwords == maxwords)
+ if (nwords == maxwords) {
+ pr_err("too many words, legal max <=%d\n", maxwords);
return -EINVAL; /* ran out of words[] before bytes */
+ }
if (*end)
*end++ = '\0'; /* terminate the word */
words[nwords++] = buf;
@@ -265,7 +269,11 @@ static inline int parse_lineno(const char *str, unsigned int *val)
return 0;
}
*val = simple_strtoul(str, &end, 10);
- return end == NULL || end == str || *end != '\0' ? -EINVAL : 0;
+ if (end == NULL || end == str || *end != '\0') {
+ pr_err("bad line-number: %s\n", str);
+ return -EINVAL;
+ }
+ return 0;
}
/*
@@ -345,8 +353,10 @@ static int ddebug_parse_query(char *words[], int nwords,
int rc;
/* check we have an even number of words */
- if (nwords % 2 != 0)
+ if (nwords % 2 != 0) {
+ pr_err("expecting pairs of match-spec <value>\n");
return -EINVAL;
+ }
memset(query, 0, sizeof(*query));
if (modname)
@@ -367,18 +377,22 @@ static int ddebug_parse_query(char *words[], int nwords,
char *first = words[i+1];
char *last = strchr(first, '-');
if (query->first_lineno || query->last_lineno) {
- pr_err("match-spec:line given 2 times\n");
+ pr_err("match-spec: line used 2x\n");
return -EINVAL;
}
if (last)
*last++ = '\0';
- if (parse_lineno(first, &query->first_lineno) < 0)
+ if (parse_lineno(first, &query->first_lineno) < 0) {
+ pr_err("line-number is <0\n");
return -EINVAL;
+ }
if (last) {
/* range <first>-<last> */
if (parse_lineno(last, &query->last_lineno)
< query->first_lineno) {
- pr_err("last-line < 1st-line\n");
+ pr_err("last-line:%d < 1st-line:%d\n",
+ query->last_lineno,
+ query->first_lineno);
return -EINVAL;
}
} else {
@@ -414,6 +428,7 @@ static int ddebug_parse_flags(const char *str, unsigned int *flagsp,
op = *str++;
break;
default:
+ pr_err("bad flag-op %c, at start of %s\n", *str, str);
return -EINVAL;
}
vpr_info("op='%c'\n", op);
@@ -425,8 +440,10 @@ static int ddebug_parse_flags(const char *str, unsigned int *flagsp,
break;
}
}
- if (i < 0)
+ if (i < 0) {
+ pr_err("unknown flag '%c' in \"%s\"\n", *str, str);
return -EINVAL;
+ }
}
vpr_info("flags=0x%x\n", flags);
@@ -458,13 +475,19 @@ static int ddebug_exec_query(char *query_string, const char *modname)
char *words[MAXWORDS];
nwords = ddebug_tokenize(query_string, words, MAXWORDS);
- if (nwords <= 0)
+ if (nwords <= 0) {
+ pr_err("tokenize failed\n");
return -EINVAL;
- if (ddebug_parse_query(words, nwords-1, &query, modname))
+ }
+ /* check flags 1st (last arg) so query is pairs of spec,val */
+ if (ddebug_parse_flags(words[nwords-1], &flags, &mask)) {
+ pr_err("flags parse failed\n");
return -EINVAL;
- if (ddebug_parse_flags(words[nwords-1], &flags, &mask))
+ }
+ if (ddebug_parse_query(words, nwords-1, &query, modname)) {
+ pr_err("query parse failed\n");
return -EINVAL;
-
+ }
/* actually go and implement the change */
nfound = ddebug_change(&query, flags, mask);
vpr_info_dq(&query, nfound ? "applied" : "no-match");
--
cgit v1.2.2
From 75096579c3ac39ddc2f8b0d9a8924eba31f4d920 Mon Sep 17 00:00:00 2001
From: Thierry Reding <thierry.reding@avionic-design.de>
Date: Mon, 21 Jan 2013 11:08:54 +0100
Subject: lib: devres: Introduce devm_ioremap_resource()
The devm_request_and_ioremap() function is very useful and helps avoid a
whole lot of boilerplate. However, one issue that keeps popping up is
its lack of a specific error code to determine which of the steps that
it performs failed. Furthermore, while the function gives an example and
suggests what error code to return on failure, a wide variety of error
codes are used throughout the tree.
In an attempt to fix these problems, this patch adds a new function that
drivers can transition to. The devm_ioremap_resource() returns a pointer
to the remapped I/O memory on success or an ERR_PTR() encoded error code
on failure. Callers can check for failure using IS_ERR() and determine
its cause by extracting the error code using PTR_ERR().
devm_request_and_ioremap() is implemented as a wrapper around the new
API and return NULL on failure as before. This ensures that backwards
compatibility is maintained until all users have been converted to the
new API, at which point the old devm_request_and_ioremap() function
should be removed.
A semantic patch is included which can be used to convert from the old
devm_request_and_ioremap() API to the new devm_ioremap_resource() API.
Some non-trivial cases may require manual intervention, though.
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
lib/devres.c | 57 ++++++++++++++++++++++++++++++++++++++++++++-------------
1 file changed, 44 insertions(+), 13 deletions(-)
(limited to 'lib')
diff --git a/lib/devres.c b/lib/devres.c
index 80b9c76d436a..9c76b3a9cc72 100644
--- a/lib/devres.c
+++ b/lib/devres.c
@@ -86,22 +86,24 @@ void devm_iounmap(struct device *dev, void __iomem *addr)
EXPORT_SYMBOL(devm_iounmap);
/**
- * devm_request_and_ioremap() - Check, request region, and ioremap resource
- * @dev: Generic device to handle the resource for
+ * devm_ioremap_resource() - check, request region, and ioremap resource
+ * @dev: generic device to handle the resource for
* @res: resource to be handled
*
- * Takes all necessary steps to ioremap a mem resource. Uses managed device, so
- * everything is undone on driver detach. Checks arguments, so you can feed
- * it the result from e.g. platform_get_resource() directly. Returns the
- * remapped pointer or NULL on error. Usage example:
+ * Checks that a resource is a valid memory region, requests the memory region
+ * and ioremaps it either as cacheable or as non-cacheable memory depending on
+ * the resource's flags. All operations are managed and will be undone on
+ * driver detach.
+ *
+ * Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
+ * on failure. Usage example:
*
* res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- * base = devm_request_and_ioremap(&pdev->dev, res);
- * if (!base)
- * return -EADDRNOTAVAIL;
+ * base = devm_ioremap_resource(&pdev->dev, res);
+ * if (IS_ERR(base))
+ * return PTR_ERR(base);
*/
-void __iomem *devm_request_and_ioremap(struct device *dev,
- struct resource *res)
+void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res)
{
resource_size_t size;
const char *name;
@@ -111,7 +113,7 @@ void __iomem *devm_request_and_ioremap(struct device *dev,
if (!res || resource_type(res) != IORESOURCE_MEM) {
dev_err(dev, "invalid resource\n");
- return NULL;
+ return ERR_PTR(-EINVAL);
}
size = resource_size(res);
@@ -119,7 +121,7 @@ void __iomem *devm_request_and_ioremap(struct device *dev,
if (!devm_request_mem_region(dev, res->start, size, name)) {
dev_err(dev, "can't request region for resource %pR\n", res);
- return NULL;
+ return ERR_PTR(-EBUSY);
}
if (res->flags & IORESOURCE_CACHEABLE)
@@ -130,10 +132,39 @@ void __iomem *devm_request_and_ioremap(struct device *dev,
if (!dest_ptr) {
dev_err(dev, "ioremap failed for resource %pR\n", res);
devm_release_mem_region(dev, res->start, size);
+ dest_ptr = ERR_PTR(-ENOMEM);
}
return dest_ptr;
}
+EXPORT_SYMBOL(devm_ioremap_resource);
+
+/**
+ * devm_request_and_ioremap() - Check, request region, and ioremap resource
+ * @dev: Generic device to handle the resource for
+ * @res: resource to be handled
+ *
+ * Takes all necessary steps to ioremap a mem resource. Uses managed device, so
+ * everything is undone on driver detach. Checks arguments, so you can feed
+ * it the result from e.g. platform_get_resource() directly. Returns the
+ * remapped pointer or NULL on error. Usage example:
+ *
+ * res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ * base = devm_request_and_ioremap(&pdev->dev, res);
+ * if (!base)
+ * return -EADDRNOTAVAIL;
+ */
+void __iomem *devm_request_and_ioremap(struct device *device,
+ struct resource *res)
+{
+ void __iomem *dest_ptr;
+
+ dest_ptr = devm_ioremap_resource(device, res);
+ if (IS_ERR(dest_ptr))
+ return NULL;
+
+ return dest_ptr;
+}
EXPORT_SYMBOL(devm_request_and_ioremap);
#ifdef CONFIG_HAS_IOPORT
--
cgit v1.2.2
From f4a18312f46a6c6e0ba7b81776b01fc36edea9fc Mon Sep 17 00:00:00 2001
From: Thierry Reding <thierry.reding@avionic-design.de>
Date: Tue, 22 Jan 2013 22:24:46 +0100
Subject: lib: devres: Fix build breakage
The ERR_PTR() and IS_ERR() macros used by the devm_ioremap_resource()
function are defined in the linux/err.h header. On ARM this seems to be
pulled in by one of the other headers but the build fails at least on
OpenRISC.
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
lib/devres.c | 1 +
1 file changed, 1 insertion(+)
(limited to 'lib')
diff --git a/lib/devres.c b/lib/devres.c
index 9c76b3a9cc72..88ad75952a76 100644
--- a/lib/devres.c
+++ b/lib/devres.c
@@ -1,3 +1,4 @@
+#include <linux/err.h>
#include <linux/pci.h>
#include <linux/io.h>
#include <linux/gfp.h>
--
cgit v1.2.2