Staging fixes for 3.11-rc3

Here are some tiny drivers/staging/ fixes for 3.11-rc3
 
 A number of bugfixes, all pretty tiny, but resolve issues that have been
 reported (the kstrtos32 change fixes a data corruption problem that Dan
 found.)  And a MAINTAINERS file update for the comedi drivers.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-3.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging fixes from Greg KH:
 "Here are some tiny drivers/staging/ fixes for 3.11-rc3

  A number of bugfixes, all pretty tiny, but resolve issues that have
  been reported (the kstrtos32 change fixes a data corruption problem
  that Dan found).  And a MAINTAINERS file update for the comedi
  drivers"

* tag 'staging-3.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  MAINTAINERS: Update the list of maintainers for staging/comedi driver.
  staging: tidspbridge: replace strict_strtol() with kstrtos32()
  staging: android: logger: Correct write offset reset on error
  staging: zram: protect zram_reset_device() call
  staging: gdm72xx: potential use after free in send_qos_list()
  staging: drm/imx: drop "select OF_VIDEOMODE"
  staging: frontier: use after free in disconnect()
  staging: comedi: fix a race between do_cmd_ioctl() and read/write
  staging: comedi: COMEDI_CANCEL ioctl should wake up read/write
This commit is contained in:
Linus Torvalds 2013-07-26 11:36:51 -07:00
commit f19e6c6939
9 changed files with 38 additions and 20 deletions

View file

@ -7818,7 +7818,7 @@ F: drivers/staging/asus_oled/
STAGING - COMEDI
M: Ian Abbott <abbotti@mev.co.uk>
M: Mori Hess <fmhess@users.sourceforge.net>
M: H Hartley Sweeten <hsweeten@visionengravers.com>
S: Odd Fixes
F: drivers/staging/comedi/

View file

@ -469,7 +469,7 @@ static ssize_t logger_aio_write(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t ppos)
{
struct logger_log *log = file_get_log(iocb->ki_filp);
size_t orig = log->w_off;
size_t orig;
struct logger_entry header;
struct timespec now;
ssize_t ret = 0;
@ -490,6 +490,8 @@ static ssize_t logger_aio_write(struct kiocb *iocb, const struct iovec *iov,
mutex_lock(&log->mutex);
orig = log->w_off;
/*
* Fix up any readers, pulling them forward to the first readable
* entry after (what will be) the new write offset. We do this now

View file

@ -9,4 +9,4 @@ TODO:
Please send patches to Greg Kroah-Hartman <greg@kroah.com> and
copy:
Ian Abbott <abbotti@mev.co.uk>
Frank Mori Hess <fmhess@users.sourceforge.net>
H Hartley Sweeten <hsweeten@visionengravers.com>

View file

@ -1413,22 +1413,19 @@ static int do_cmd_ioctl(struct comedi_device *dev,
DPRINTK("subdevice busy\n");
return -EBUSY;
}
s->busy = file;
/* make sure channel/gain list isn't too long */
if (cmd.chanlist_len > s->len_chanlist) {
DPRINTK("channel/gain list too long %u > %d\n",
cmd.chanlist_len, s->len_chanlist);
ret = -EINVAL;
goto cleanup;
return -EINVAL;
}
/* make sure channel/gain list isn't too short */
if (cmd.chanlist_len < 1) {
DPRINTK("channel/gain list too short %u < 1\n",
cmd.chanlist_len);
ret = -EINVAL;
goto cleanup;
return -EINVAL;
}
async->cmd = cmd;
@ -1438,8 +1435,7 @@ static int do_cmd_ioctl(struct comedi_device *dev,
kmalloc(async->cmd.chanlist_len * sizeof(int), GFP_KERNEL);
if (!async->cmd.chanlist) {
DPRINTK("allocation failed\n");
ret = -ENOMEM;
goto cleanup;
return -ENOMEM;
}
if (copy_from_user(async->cmd.chanlist, user_chanlist,
@ -1491,6 +1487,9 @@ static int do_cmd_ioctl(struct comedi_device *dev,
comedi_set_subdevice_runflags(s, ~0, SRF_USER | SRF_RUNNING);
/* set s->busy _after_ setting SRF_RUNNING flag to avoid race with
* comedi_read() or comedi_write() */
s->busy = file;
ret = s->do_cmd(dev, s);
if (ret == 0)
return 0;
@ -1705,6 +1704,7 @@ static int do_cancel_ioctl(struct comedi_device *dev, unsigned int arg,
void *file)
{
struct comedi_subdevice *s;
int ret;
if (arg >= dev->n_subdevices)
return -EINVAL;
@ -1721,7 +1721,11 @@ static int do_cancel_ioctl(struct comedi_device *dev, unsigned int arg,
if (s->busy != file)
return -EBUSY;
return do_cancel(dev, s);
ret = do_cancel(dev, s);
if (comedi_get_subdevice_runflags(s) & SRF_USER)
wake_up_interruptible(&s->async->wait_head);
return ret;
}
/*
@ -2053,11 +2057,13 @@ static ssize_t comedi_write(struct file *file, const char __user *buf,
if (!comedi_is_subdevice_running(s)) {
if (count == 0) {
mutex_lock(&dev->mutex);
if (comedi_is_subdevice_in_error(s))
retval = -EPIPE;
else
retval = 0;
do_become_nonbusy(dev, s);
mutex_unlock(&dev->mutex);
}
break;
}
@ -2156,11 +2162,13 @@ static ssize_t comedi_read(struct file *file, char __user *buf, size_t nbytes,
if (n == 0) {
if (!comedi_is_subdevice_running(s)) {
mutex_lock(&dev->mutex);
do_become_nonbusy(dev, s);
if (comedi_is_subdevice_in_error(s))
retval = -EPIPE;
else
retval = 0;
mutex_unlock(&dev->mutex);
break;
}
if (file->f_flags & O_NONBLOCK) {
@ -2198,9 +2206,11 @@ static ssize_t comedi_read(struct file *file, char __user *buf, size_t nbytes,
buf += n;
break; /* makes device work like a pipe */
}
if (comedi_is_subdevice_idle(s) &&
async->buf_read_count - async->buf_write_count == 0) {
do_become_nonbusy(dev, s);
if (comedi_is_subdevice_idle(s)) {
mutex_lock(&dev->mutex);
if (async->buf_read_count - async->buf_write_count == 0)
do_become_nonbusy(dev, s);
mutex_unlock(&dev->mutex);
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&async->wait_head, &wait);

View file

@ -827,11 +827,11 @@ static void usb_alphatrack_disconnect(struct usb_interface *intf)
mutex_unlock(&dev->mtx);
usb_alphatrack_delete(dev);
} else {
atomic_set(&dev->writes_pending, 0);
dev->intf = NULL;
mutex_unlock(&dev->mtx);
}
atomic_set(&dev->writes_pending, 0);
mutex_unlock(&disconnect_mutex);
dev_info(&intf->dev, "Alphatrack Surface #%d now disconnected\n",

View file

@ -250,8 +250,8 @@ static void send_qos_list(struct nic *nic, struct list_head *head)
list_for_each_entry_safe(entry, n, head, list) {
list_del(&entry->list);
free_qos_entry(entry);
gdm_wimax_send_tx(entry->skb, entry->dev);
free_qos_entry(entry);
}
}

View file

@ -33,7 +33,6 @@ config DRM_IMX_TVE
config DRM_IMX_LDB
tristate "Support for LVDS displays"
depends on DRM_IMX
select OF_VIDEOMODE
help
Choose this to enable the internal LVDS Display Bridge (LDB)
found on i.MX53 and i.MX6 processors.

View file

@ -1120,8 +1120,11 @@ static int dbll_rmm_alloc(struct dynamic_loader_allocate *this,
or DYN_EXTERNAL, then mem granularity information is present
within the section name - only process if there are at least three
tokens within the section name (just a minor optimization) */
if (count >= 3)
strict_strtol(sz_last_token, 10, (long *)&req);
if (count >= 3) {
status = kstrtos32(sz_last_token, 10, &req);
if (status)
goto func_cont;
}
if ((req == 0) || (req == 1)) {
if (strcmp(sz_sec_last_token, "DYN_DARAM") == 0) {

View file

@ -527,8 +527,11 @@ static void zram_reset_device(struct zram *zram)
size_t index;
struct zram_meta *meta;
if (!zram->init_done)
down_write(&zram->init_lock);
if (!zram->init_done) {
up_write(&zram->init_lock);
return;
}
meta = zram->meta;
zram->init_done = 0;
@ -549,6 +552,7 @@ static void zram_reset_device(struct zram *zram)
zram->disksize = 0;
set_capacity(zram->disk, 0);
up_write(&zram->init_lock);
}
static void zram_init_device(struct zram *zram, struct zram_meta *meta)