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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-02-21 17:12:17 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-02-21 17:12:17 +0100
commit7f2b8af282fb73e808fa0e7743f51b8632130d33 (patch)
treed07b705e9228cfdcfbe99cb32c9597709fbd3d39 /drivers/hwtracing
parent37fd0b623023484ef6df79ed46f21f06ecc611ff (diff)
parentbf7cbaae0831252b416f375ca9b1027ecd4642dd (diff)
downloadlinux-stericsson-7f2b8af282fb73e808fa0e7743f51b8632130d33.tar.gz
Merge tag 'intel_th-stm-for-greg-20190221' of git://git.kernel.org/pub/scm/linux/kernel/git/ash/stm into char-misc-next
Alexander writes: stm class/intel_th: Updates for v5.1 These are: * 2 bugfixes in stm class * one bugfix in intel_th * a few minor cleanups * tag 'intel_th-stm-for-greg-20190221' of git://git.kernel.org/pub/scm/linux/kernel/git/ash/stm: stm class: Prevent division by zero stm class: Fix an endless loop in channel allocation intel_th: Don't reference unassigned outputs intel_th: pti: Use sysfs_match_string() helper intel_th: Only create useful device nodes intel_th: Mark expected switch fall-throughs intel_th: Update ABI documentation
Diffstat (limited to 'drivers/hwtracing')
-rw-r--r--drivers/hwtracing/intel_th/core.c6
-rw-r--r--drivers/hwtracing/intel_th/gth.c4
-rw-r--r--drivers/hwtracing/intel_th/pti.c16
-rw-r--r--drivers/hwtracing/intel_th/sth.c4
-rw-r--r--drivers/hwtracing/stm/core.c11
5 files changed, 28 insertions, 13 deletions
diff --git a/drivers/hwtracing/intel_th/core.c b/drivers/hwtracing/intel_th/core.c
index fc6b7f8b62fb..7c1acc2f801c 100644
--- a/drivers/hwtracing/intel_th/core.c
+++ b/drivers/hwtracing/intel_th/core.c
@@ -422,6 +422,7 @@ static const struct intel_th_subdevice {
unsigned nres;
unsigned type;
unsigned otype;
+ bool mknode;
unsigned scrpd;
int id;
} intel_th_subdevices[] = {
@@ -456,6 +457,7 @@ static const struct intel_th_subdevice {
.name = "msc",
.id = 0,
.type = INTEL_TH_OUTPUT,
+ .mknode = true,
.otype = GTH_MSU,
.scrpd = SCRPD_MEM_IS_PRIM_DEST | SCRPD_MSC0_IS_ENABLED,
},
@@ -476,6 +478,7 @@ static const struct intel_th_subdevice {
.name = "msc",
.id = 1,
.type = INTEL_TH_OUTPUT,
+ .mknode = true,
.otype = GTH_MSU,
.scrpd = SCRPD_MEM_IS_PRIM_DEST | SCRPD_MSC1_IS_ENABLED,
},
@@ -635,7 +638,8 @@ intel_th_subdevice_alloc(struct intel_th *th,
}
if (subdev->type == INTEL_TH_OUTPUT) {
- thdev->dev.devt = MKDEV(th->major, th->num_thdevs);
+ if (subdev->mknode)
+ thdev->dev.devt = MKDEV(th->major, th->num_thdevs);
thdev->output.type = subdev->otype;
thdev->output.port = -1;
thdev->output.scratchpad = subdev->scrpd;
diff --git a/drivers/hwtracing/intel_th/gth.c b/drivers/hwtracing/intel_th/gth.c
index 8426b7970c14..cc287cf6eb29 100644
--- a/drivers/hwtracing/intel_th/gth.c
+++ b/drivers/hwtracing/intel_th/gth.c
@@ -607,6 +607,7 @@ static void intel_th_gth_unassign(struct intel_th_device *thdev,
{
struct gth_device *gth = dev_get_drvdata(&thdev->dev);
int port = othdev->output.port;
+ int master;
if (thdev->host_mode)
return;
@@ -615,6 +616,9 @@ static void intel_th_gth_unassign(struct intel_th_device *thdev,
othdev->output.port = -1;
othdev->output.active = false;
gth->output[port].output = NULL;
+ for (master = 0; master < TH_CONFIGURABLE_MASTERS; master++)
+ if (gth->master[master] == port)
+ gth->master[master] = -1;
spin_unlock(&gth->gth_lock);
}
diff --git a/drivers/hwtracing/intel_th/pti.c b/drivers/hwtracing/intel_th/pti.c
index 56694339cb06..0da6b787f553 100644
--- a/drivers/hwtracing/intel_th/pti.c
+++ b/drivers/hwtracing/intel_th/pti.c
@@ -272,19 +272,17 @@ static ssize_t lpp_dest_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t size)
{
struct pti_device *pti = dev_get_drvdata(dev);
- ssize_t ret = -EINVAL;
int i;
- for (i = 0; i < ARRAY_SIZE(lpp_dest_str); i++)
- if (sysfs_streq(buf, lpp_dest_str[i]))
- break;
+ i = sysfs_match_string(lpp_dest_str, buf);
+ if (i < 0)
+ return i;
- if (i < ARRAY_SIZE(lpp_dest_str) && pti->lpp_dest_mask & BIT(i)) {
- pti->lpp_dest = i;
- ret = size;
- }
+ if (!(pti->lpp_dest_mask & BIT(i)))
+ return -EINVAL;
- return ret;
+ pti->lpp_dest = i;
+ return size;
}
static DEVICE_ATTR_RW(lpp_dest);
diff --git a/drivers/hwtracing/intel_th/sth.c b/drivers/hwtracing/intel_th/sth.c
index 4b7ae47789d2..3a1f4e650378 100644
--- a/drivers/hwtracing/intel_th/sth.c
+++ b/drivers/hwtracing/intel_th/sth.c
@@ -84,8 +84,12 @@ static ssize_t notrace sth_stm_packet(struct stm_data *stm_data,
/* Global packets (GERR, XSYNC, TRIG) are sent with register writes */
case STP_PACKET_GERR:
reg += 4;
+ /* fall through */
+
case STP_PACKET_XSYNC:
reg += 8;
+ /* fall through */
+
case STP_PACKET_TRIG:
if (flags & STP_PACKET_TIMESTAMPED)
reg += 4;
diff --git a/drivers/hwtracing/stm/core.c b/drivers/hwtracing/stm/core.c
index 93ce3aa740a9..c7ba8acfd4d5 100644
--- a/drivers/hwtracing/stm/core.c
+++ b/drivers/hwtracing/stm/core.c
@@ -244,6 +244,9 @@ static int find_free_channels(unsigned long *bitmap, unsigned int start,
;
if (i == width)
return pos;
+
+ /* step over [pos..pos+i) to continue search */
+ pos += i;
}
return -1;
@@ -732,7 +735,7 @@ static int stm_char_policy_set_ioctl(struct stm_file *stmf, void __user *arg)
struct stm_device *stm = stmf->stm;
struct stp_policy_id *id;
char *ids[] = { NULL, NULL };
- int ret = -EINVAL;
+ int ret = -EINVAL, wlimit = 1;
u32 size;
if (stmf->output.nr_chans)
@@ -760,8 +763,10 @@ static int stm_char_policy_set_ioctl(struct stm_file *stmf, void __user *arg)
if (id->__reserved_0 || id->__reserved_1)
goto err_free;
- if (id->width < 1 ||
- id->width > PAGE_SIZE / stm->data->sw_mmiosz)
+ if (stm->data->sw_mmiosz)
+ wlimit = PAGE_SIZE / stm->data->sw_mmiosz;
+
+ if (id->width < 1 || id->width > wlimit)
goto err_free;
ids[0] = id->id;