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authorLinus Torvalds <torvalds@linux-foundation.org>2017-09-07 14:43:33 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-07 14:43:33 -0700
commit74fee4e88fd196c712abfdae89acfa272abf10f8 (patch)
tree942a2668830b36f5cf9bc9f2c77948f8b04c2742 /drivers/of/device.c
parent7d955656121f547ff9a708ed7ee4c86a08bf628a (diff)
parent84024468cf1612783e6ab317da5b72fa41487ac6 (diff)
Merge tag 'devicetree-for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull DeviceTree updates from Rob Herring: "There's a few orphans in the conversion to %pOF printf specifiers included here that no one else picked up. Summary: - Convert more DT code to use of_property_read_* API. - Improve DT overlay support when adding multiple overlays - Convert printk's to %pOF format specifiers. Most went via subsystem trees, but picked up the remaining orphans - Correct unittests to use preferred "okay" for "status" property value - Add a KASLR seed property - Vendor prefixes for Mellanox, Theobroma System, Adaptrum, Moxa - Fix modalias buffer handling - Clean-up of include paths for building dtbs - Add bindings for amc6821, isl1208, tsl2x7x, srf02, and srf10 devices - Add nvmem bindings for MediaTek MT7623 and MT7622 SoC - Add compatible string for Allwinner H5 Mali-450 GPU - Fix links to old OpenFirmware docs with new mirror on devicetree.org - Remove status property from binding doc examples" * tag 'devicetree-for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (45 commits) devicetree: Adjust status "ok" -> "okay" under drivers/of/ dt-bindings: Remove "status" from examples dt-bindings: pinctrl: sh-pfc: Use generic node name dt-bindings: Add vendor Mellanox dt-binding: net/phy: fix interrupts description virt: Convert to using %pOF instead of full_name macintosh: Convert to using %pOF instead of full_name ide: pmac: Convert to using %pOF instead of full_name microblaze: Convert to using %pOF instead of full_name dt-bindings: usb: musb: Grammar s/the/to/, s/is/are/ of: Use PLATFORM_DEVID_NONE definition of/device: Fix of_device_get_modalias() buffer handling of/device: Prevent buffer overflow in of_device_modalias() dt-bindings: add amc6821, isl1208 trivial bindings dt-bindings: add vendor prefix for Theobroma Systems of: search scripts/dtc/include-prefixes path for both CPP and DTC of: remove arch/$(SRCARCH)/boot/dts from include search path for CPP of: remove drivers/of/testcase-data from include search path for CPP of: return of_get_cpu_node from of_cpu_device_node_get if CPUs are not registered iio: srf08: add device tree binding for srf02 and srf10 ...
Diffstat (limited to 'drivers/of/device.c')
-rw-r--r--drivers/of/device.c75
1 files changed, 31 insertions, 44 deletions
diff --git a/drivers/of/device.c b/drivers/of/device.c
index e0a28ea341fe..17b66e9715d2 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -58,7 +58,7 @@ int of_device_add(struct platform_device *ofdev)
/* name and id have to be set so that the platform bus doesn't get
* confused on matching */
ofdev->name = dev_name(&ofdev->dev);
- ofdev->id = -1;
+ ofdev->id = PLATFORM_DEVID_NONE;
/*
* If this device has not binding numa node in devicetree, that is
@@ -196,8 +196,10 @@ EXPORT_SYMBOL(of_device_get_match_data);
static ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len)
{
const char *compat;
- int cplen, i;
- ssize_t tsize, csize, repend;
+ char *c;
+ struct property *p;
+ ssize_t csize;
+ ssize_t tsize;
if ((!dev) || (!dev->of_node))
return -ENODEV;
@@ -205,42 +207,28 @@ static ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len
/* Name & Type */
csize = snprintf(str, len, "of:N%sT%s", dev->of_node->name,
dev->of_node->type);
-
- /* Get compatible property if any */
- compat = of_get_property(dev->of_node, "compatible", &cplen);
- if (!compat)
- return csize;
-
- /* Find true end (we tolerate multiple \0 at the end */
- for (i = (cplen - 1); i >= 0 && !compat[i]; i--)
- cplen--;
- if (!cplen)
- return csize;
- cplen++;
-
- /* Check space (need cplen+1 chars including final \0) */
- tsize = csize + cplen;
- repend = tsize;
-
- if (csize >= len) /* @ the limit, all is already filled */
- return tsize;
-
- if (tsize >= len) { /* limit compat list */
- cplen = len - csize - 1;
- repend = len;
- }
-
- /* Copy and do char replacement */
- memcpy(&str[csize + 1], compat, cplen);
- for (i = csize; i < repend; i++) {
- char c = str[i];
- if (c == '\0')
- str[i] = 'C';
- else if (c == ' ')
- str[i] = '_';
+ tsize = csize;
+ len -= csize;
+ if (str)
+ str += csize;
+
+ of_property_for_each_string(dev->of_node, "compatible", p, compat) {
+ csize = strlen(compat) + 1;
+ tsize += csize;
+ if (csize > len)
+ continue;
+
+ csize = snprintf(str, len, "C%s", compat);
+ for (c = str; c; ) {
+ c = strchr(c, ' ');
+ if (c)
+ *c++ = '_';
+ }
+ len -= csize;
+ str += csize;
}
- return repend;
+ return tsize;
}
int of_device_request_module(struct device *dev)
@@ -274,6 +262,8 @@ ssize_t of_device_modalias(struct device *dev, char *str, ssize_t len)
ssize_t sl = of_device_get_modalias(dev, str, len - 2);
if (sl < 0)
return sl;
+ if (sl > len - 2)
+ return -ENOMEM;
str[sl++] = '\n';
str[sl] = 0;
@@ -288,25 +278,22 @@ void of_device_uevent(struct device *dev, struct kobj_uevent_env *env)
{
const char *compat;
struct alias_prop *app;
- int seen = 0, cplen, sl;
+ struct property *p;
+ int seen = 0;
if ((!dev) || (!dev->of_node))
return;
add_uevent_var(env, "OF_NAME=%s", dev->of_node->name);
- add_uevent_var(env, "OF_FULLNAME=%s", dev->of_node->full_name);
+ add_uevent_var(env, "OF_FULLNAME=%pOF", dev->of_node);
if (dev->of_node->type && strcmp("<NULL>", dev->of_node->type) != 0)
add_uevent_var(env, "OF_TYPE=%s", dev->of_node->type);
/* Since the compatible field can contain pretty much anything
* it's not really legal to split it out with commas. We split it
* up using a number of environment variables instead. */
- compat = of_get_property(dev->of_node, "compatible", &cplen);
- while (compat && *compat && cplen > 0) {
+ of_property_for_each_string(dev->of_node, "compatible", p, compat) {
add_uevent_var(env, "OF_COMPATIBLE_%d=%s", seen, compat);
- sl = strlen(compat) + 1;
- compat += sl;
- cplen -= sl;
seen++;
}
add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen);